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24 Series Lobe Pumps

02/03

User Benefits
The Jabsco 24 Series range of rotary lobe
pumps was originally designed in 1981 and
during the following years has been adapted
and modified to suit the demands of the
hygiene conscious industries eg: Food, Dairy,
Beverage, Cosmetic, Pharmaceutical and
Chemical. The pump design uses the industry
proven and well-accepted tri-lobe rotor
concept.

The key design concept of the 24 Series pump

range is adaptability. The main features of this
adaptability are:-

ï Interchangeable seal types

ï Interchangeable rotor designs
IMPROVED HYGIENE TECHNOLOGY has been
ï Interchangeable end cover options
ï Adaptable foot mounting an integral part of the pump development and is
achieved by using a fully swept pump chamber
together with sealed rotor splines, accessible
The RUGGED bearing frame design uses large seals and approved sealing components. All this
diameter shafts mounted in high specification ensures that the pump meets the stringent
taper roller bearings, fitted into rigid pillars which requirements of major international customers.
form an integral part of the high grade alloy
bearing frame. These ensure maximum shaft
stiffness and minimum shaft deflection in order The pump is designed to meet the requirements
of: -
to avoid premature pump failure due to over-
pressure or other abuse, without the use of
internal pump head bearings or bearing surfaces. ï US 3A Sanitary Standard for pumps for
Milk and milk products number 02-09
ï US 3A Sanitary Standard for Elastomers
number 18-03
LOW MAINTENANCE is achieved by immersing
the bearing and shaft assemblies in an oil bath ï US Department of Agriculture (USDA)
to give maximum life even at extremes of standards for Poultry
ï Fluid contact materials conform to US Food
operating conditions. The timing gears are easily
accessible at the rear of the pump in the unlikely & Drugs Administration (FDA) GRAS list
event that re-timing should become necessary. (Generally Regarded As Safe) and includes
Rotors are fully interchangeable avoiding the conformance to Title 21, Sections 177.2600
and 177.1550
need to re-time which is a problem associated
with so many other rotary lobe and circumferential
piston pumps.
Machine Translated by Google

24 Series Lobe Pumps

02/03

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0247
Machine Translated by Google

24 Series Lobe Pumps

02/03

Basic Principles of Design and Operation

Fig. 1
Jabsco 24 Series positive displacement rotary Lobe
Pumps are designed to pump delicate, viscous and Rotor Lengths
particle-laden fluids as well as thin liquids which
require an all stainless steel pump. The design of Being a positive displacement pump, flow is related
Jabsco Lobe Pumps is influenced by some not only to the rotor diameter but also the rotor length.
fundamental engineering principles and it is useful to A rotor length increased by 50% will displace 50%
understand these first to ensure their most effective more flow. The longer rotor also has a larger surface
selection and operation. area on which the fluid pressure acts trying to force
the rotor to one side (see Fig 2). Therefore longer
All 24 Series Lobe Pumps use the same principle of rotors put more load on the pump shafts and bearings
operation. Two rotors turn in opposite directions; fluid at any particular pressure, so the maximum working
enters the pump from the inlet port and fills the space pressure of a pump using a long rotor is lower than
between the rotors. This fluid is carried around the that of a short rotor, limited by the clearances provided
outside of the rotors and is forced out of the discharge and ultimately by the shaft strength.
port as the rotor lobes mesh together - see Fig 1. The
displaced flow rate of the pump is therefore directly
proportional to the diameter of the rotors and the
speed at which the pump rotates.

Overhung Rotors
Fig. 2
In Jabsco Lobe Pumps, each rotor is supported on its
own shaft and there are no bearings inside the pump
chamber, so all forces from the fluid pressure are Rotor Clearances
transmitted through the shafts to external bearings.
The rotors are therefore overhung, as the shafts are When the pump is running within its operating limits,
cantilevered and are designed to resist the fluid the rotors never touch each other and never touch
pressure without excessive bending. the case in which they rotate.
These clearances are typically only 0.05 to 0.50mm
The bearings are permanently lubricated and are (0.002 to 0.020 inches). This absence of contact
sealed from the pump head ensuring that: ensures that no material contaminates the pumped
ï No lubricant contaminates the pumped fluid. ï fluid and also makes Jabsco Lobe Pumps ideal for
No bearing material is worn away. ï abrasive fluids.
No pumped fluid (which may be corrosive or abrasive)
can enter the bearings. ï No
pumped fluid is trapped behind bearings from
where it cannot be cleaned out.
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24 Series Lobe Pumps

02/03

Separate timing gears exactly synchronize the rotation

of the two shafts to ensure that the pump head
components do not touch, unlike for example gear
pumps where one gear drives the other and can wear,
resulting in a loss of efficiency.
Fig. 5
Volumetric Efficiency
The clearances within the pump head must be large
enough to allow for shaft deflection under pressure
and for thermal expansion without rotor contact but
must also be kept as small as possible to maintain
pump efficiency. Volumetric efficiency is lost when
liquid ìslipsî from the discharge side back to the inlet
side through the rotor clearances. The amount of slip
is affected by the size of the clearances, the differential Fig. 6
pressure generated by the pump and the fluid
viscosity: Larger clearances result in higher slip; the
fluid can more easily leak back through the larger area (Fig 5).
Higher pressure results in higher slip; the pressure
forces more liquid back through the clearances (Fig 6).
Higher fluid viscosity results in lower slip; high-
viscosity liquids flow less easily through the pump
head clearances than thin liquids (Fig 7).

Therefore, especially when pumping thinner liquids,

Fig. 7
rotor clearances are kept as small as possible to
maintain efficiency. However, higher pressures force
the rotors sideways within the rotor case, towards the Pump Output
inlet port, also slightly tilting the rotors. Therefore for
higher pressures, more clearance is necessary to From the above, it can clearly be seen that the output
prevent rotor to rotor case contact, up to a maximum flow rate from a Lobe Pump is a function of:
allowable for a particular shaft and rotor configuration. ï Rotor diameter ï
Lastly, high operating temperatures and, especially, Rotor length ï
sudden changes in temperature eg during CIP result Speed of rotation ï
in different rates of expansion of the pump head Lost flow due to slip back through internal
components. Therefore sufficient clearance must be clearances
provided to allow for this.
The speed at which the pump runs is calculated to
displace the required flow, plus extra displacement to
compensate for any slip.

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0248
Machine Translated by Google

24 Series Lobe Pumps

02/03

Operating Data
Machine Translated by Google

24 Series Lobe Pumps

02/03

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USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0249
Machine Translated by Google

24 Series Lobe Pumps

02/03

Model Numbering System

Machine Translated by Google

24 Series Lobe Pumps

02/03

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0250
Machine Translated by Google

24 Series Lobe Pumps

02/03

Materials and Design

24 Series rotary lobe pumps are designed using the These materials have the following physical
latest technology Computer Aided Design (CAD) and properties:-
are manufactured from high grade materials to
exacting tolerances through the use of Computer Physical Properties - percent
Aided Manufacture on multi-axis numerical controlled Country
C Ci Mn Ni Cr Mo S.max P.max
requirements
machining centers and checked using computer min - - - 8.0 17 2.0
controlled tri-co-ordinate inspection equipment. UK 0.04 0.04
max 0.08 1.5 2 - 20 3.0
Every pump undergoes stringent testing prior to -
min - 9.0 18 2.0 -
USES 0.04 0.04
dispatch to ensure that only the highest quality max 0.08 1.5 1.5 12.0 21 3.0
min - - - 9.0 17 2.0
product reaches our demanding customers. German 0.03 0.045
max 0.12 2 1.5 11.0 19.5 2.5
min - - - 10.0 17 2.5
Swedish 0.03 0.045
max 0.06 1.5 2 13.5 20 3.2
Standard Pump Features min - 0.2 - 9.0 17 2.0
French 0.03 0.04
max 0.08 1 1.5 13.0 20 3.0
The following pump features are offered as standard
on all 24 Series rotary lobe pumps. The Rotor case is a one-piece shell molded casting
which is fully machined internally and externally. The
ï Traditional tri-lobe rotor design. rotor case design allows for fully swept cavities
ï Pump head in AISI 316 Stainless Steel - internally during operation with no crevices for microbial
and externally machined. entrapment. The casing internal shape is a 'figure - 8'
ï Bearing housing and pump head separated to to ensure maximum volumetric efficiency on low
avoid cross contamination of product or gearbox. viscosity products. Various options of shaft seal can
be accommodated without the need for extra
ï Ease of assembly with spigots and precision
dowels. machining to the standard casing.
ï Interchangeable key components. Rotors are manufactured from either extruded bar or
ï Comprehensive range of shaft sealing devices.
from casting and are precision profiled milled on the
ï Adaptable feet - optional mounting arrangements. latest CNC machinery. The standard rotors are tri-lobe
ï Externally mounted helical timing gears. profile computer designed for maximum
ï Dual rotation. volumetric efficiency and displacement. The
ï Range of ports to suit US and European accuracy of the profile ensures that rotors can be
standards. interchanged during repair, either shaft to shaft or
even new rotors without the need to re-time the pump
shafts. Jabsco was the first to achieve this and still
Pump Head remains at the forefront in this respect.

Pump Head (Rotor case, Rotors, Rotor retainers End Covers are of a heavy duty construction and on
and End Cover) manufactured from AISI 316 larger pump sizes has a stiffening boss on the
Stainless Steel, whose nearest equivalent is: - outside to ensure that it does not deflect under
pressure, thus maintaining the volumetric efficiency
UK BS 316 S16 and BS3100 316 C71 of the pump on low viscosity products, even at high
USES AISI 316 and ASTM A351 CF8M pressure. There are 4 slots machined into the sides
GERMANY WERKSTOFF No. 1.4401 of the cover to aid disassembly of the cover from the
SWEDEN SS-2347 & SIS 114.23.33.23.33.12 rotor case, even after sticky products have been
FRANCE NFA32-055 Z6 CND 1812-M pumped and have been allowed to 'glue' the cover to
the casing.
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24 Series Lobe Pumps

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Bearing Housing Assembly

Bearing Housing Assembly is made up of two

AISI 316 stainless steel shafts running in two
taper roller bearings at the front and a roller
bearing at the rear (S2 size pump uses needle
roller bearings at front and rear with the rear
one incorporating a thrust race) . These
bearings are housed in a high grade Aluminum
40E alloy housing (S2 and E2 use a cast iron
bearing housing). This grade of aluminum
was chosen for its lightness, exceptional
strength, machinability, attractive appearance,
accurate surfaces and sharply defined detail.
It also maintains its positional accuracy and
fine tolerances at extremes of temperature.
This housing is coated in an electrostatically
applied epoxy powder coating for maximum
corrosion resistance and durability.
2 (bottom fitting, deep) but with a modified spline
width to ensure minimum rotor movement thus
minimizing rotor clearances. S2 size pumps use a
Aluminum 40E specification - tight fitting Woodruff key to drive the rotor. ï
Chemical: All keyways are machined to BS4235, Part
Magnesium 0.5 to 0.7%
Zinc 4.75 to 6.0% 1(1972), similar to ISO R773 and R774. ï
Chromium 0.4 to 0.6% Drive shaft ends conform to BS4506 in both length and
Titanium 0.15 to 0.25%
diameter, approximately equivalent to ISO R775. ï
Manganese Not more than 0.1% Shaft
Physical: heights conform to BS5186, roughly equivalent to ISO
Tensile Strength 216-247 Mpa (14-16 tonf/in) 0.1% R496. ï Shaft diameter
proof stress 170-185 Mpa (11-12 tonf/in)
through the seal conforms to DIN
Elongation 4-5% 24960.

Mounting the two taper roller bearings at the front facing

Timing Gears are of a helical design in order to simplify
in a back-to-back configuration ensures that the actual
shaft synchronization (rotor timing) and also to reduce
load bearing point acts in one position so that the 2
noise from the gearbox. The gears are manufactured
bearings act as one unit. This also ensures that any from a 1% Nickel-Chrome Molybdenum steel conforming
temperature changes do not affect the rotor clearances
to BS970, Part 2: 1970 Spec 817M40 which has the
within the pump head but are simply transmitted through
following properties-
the rear bearing.

The Shafts are again made from AISI 316 Stainless

tensile strength 850-1000Mpa
Steel and have the following features- Yield stress 650-680Mpa
ï All bearing, gear, rotor and drive abutments are Hardness 248-302 Brinell
precision ground to a 1.6 µm Ra finished with seal
areas ground to 0.4 µm Ra.
ï Shaft rotor splines are machined to BS2059, Table
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24 Series Lobe Pumps

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The timing gears are situated at the rear of the pump

under a separate gear cover which can be easily
removed for access to the gears should re-timing
ever become necessary. This re-timing is simply
carried out by placing shims between the gear and
it's abutment with the bearing spacer. The helix angle
of approx. 30 degrees means that the ratio of shims
to rotor movement is 3:1 and so very accurate rotor

synchronization can be achieved.

Machine Translated by Google

24 Series Lobe Pumps

02/03

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0251
Machine Translated by Google

24 Series Lobe Pumps

02/03

Rotors
The 24 Series Lobe Pump range is designed to use the ï Standard Pressure (Code 1) for most application
well-proven TRI-LOBE rotor form. types.
ï High Efficiency (Code 0) for reduced slip on low
Design Features viscosity products, but with a reduced pressure
capability.
ï High Pressure (Code 4) for maximum pressure
The advantages of the 'LOBE' type rotor when compared capability on high viscosity products.
to the 'Scimitar' rotor, often referred to as
'Hammer Head', 'Bow Tie' or 'Bi-Wing' rotor and also the
'Circumferential Piston' type rotor are -

ï Fully swept rotor bore. ï

No 'carry back' of product. ï
Good self priming capability. ï
Good viscous product handling. ï
Large particulate handling. ï No
sharp edges or leading edges which could slice particles.

The Jabsco 24 Series rotor profile is accurately machined

on the latest 'state-of-the-art' CNC machinery to exacting These 3 rotor clearance groups are capable of achieving
tolerances and is checked on computer controlled tri-co- the full temperature capability of every pump, although
ordinate inspection equipment. This ensures complete at higher temperatures the pressure capability is reduced.
interchangeability between similar rotor types and also ï code 0 rotors can
achieve their maximum pressure capability at
between different rotor forms. The result is reduced
'down-time' for users and improved volumetric efficiency temperatures up to 65C (150F).
on low viscosity liquids.
ï code 1 & 4 rotors can achieve their maximum pressure
capability at temperatures up to 110C (230F).

Rotor Options (See individual Performance Charts for more detailed

information).
Most pumps can also accommodate 4 rotor types.
These are- Bi-Lobe Rotors

ï Tri-Lobe (3 lobe) rotors ï These have similar features to the Tri-lobe rotor but
Bi-Lobe (2 lobe) rotors ï having only 2 lobes per rotor they have the following
Rubber covered Tri-Lobe rotors advantages -
ï Gear form - 8 Lobed - rotors (S2 size pump
ïCan handle larger particle size. ï
only)
Can handle a higher concentration of solids
without damage to the solids.
Tri-Lobe Rotors
ï Improved NIPR (Net Inlet Pressure Requirement) on
very high viscosity products. ï
The Jabsco 24 Series pump Tri-lobe rotor manufactured
from AISI 316 Stainless Steel and are available to give Reduced shear damage to high viscosity products or
3 different pump head clearances, these are - those containing particulates.
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24 Series Lobe Pumps

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Typical products handled by Bi-Lobe rotors are - ï Allows small hard solids to be handled without
causing the rotors to 'block' which would result in
ï Yoghurts containing fruit pieces ï rotor and shaft damage.
Whole fruit preserves ï ï Can handle abrasive liquids with reduced wear to
Cottage cheese ï the rotor and casing.
Pie filling ï ï Copes with accidental over-pressure of the pump
Butter and margarine ï without causing rotor and casing damage.
Cake and bread mixes ï
Meat pastes ï
Pet food

Typical products handled are -

ï Meat and fish products - containing small bone

Particulate Handling Properties of particles
Tri-Lobe and Bi-Lobe Rotors: ï Ice cream and fruit concentrates - containing
Pump Tri-Lobe Bi-Lobe small ice crystals
Size Rotor Rotor ï Egg products - containing small pieces of eggs
3 shell
S2 5mm ( /16" ) Not Available

A1 18mm ( 11/16" ) 18mm ( 11/16" )

The technical specifications of this rotor type are -
1 9
A2 13mm ( /2" ) 15mm ( / /16" )
1
B1 13mm ( 2" ) 18mm ( 11/16" ) ï Nitrile conforming to the US 3A Sanitary Standard
B2 18mm ( 11/16" ) 18mm ( 11/16" )
for Elastomers number 18-03.
C1 18mm ( 11/16 " ) 32mm ( 1
1
/4" )
ï US FDA approved bonding agent. ï
3 1 Equivalent to Stainless Steel rotor code 0 in terms of
C2 20mm ( /4" ) 32mm ( 1 /4" )
1 1
performance and pressure capability. ï
D1 32mm ( 1 /4" ) 37mm ( 1 /2" )
Maximum 65C (150F) temperature capability for
1 1
D2 32mm ( 1 /4" ) 37mm ( 1 /2" ) continuous use.
1 5
E2 37mm ( 1 /2" ) 48mm ( 1 /8" ) ï Maximum 100C (212F) temperature capability
for intermittent use ie CIP.
Rubber Covered Rotors (A & B Size
Pumps Only)
These retain all the features of the Stainless Steel
Tri-Lobe Rotor but have a thick rubber coating bonded
to a Stainless Steel hub. This gives these additional
features -
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24 Series Lobe Pumps

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Gear Type - 8 Lobe - Rotor (S2 Only)

The advantage of this type of rotor is that it has more

sealing points between the suction (low pressure side)
and the discharge (high pressure side) and therefore
reduces the back flow (slip) of low viscosity product
(lower than 100 cP). This is only necessary on very
small pumps where the relationship between rotor
clearances and pump displacement is high. The
downside of this rotor form is its limitation in particulate
handling.

Conversions and
Interchangeability

All rotor types can be interchanged without the need

for re-shimming of front or rear clearances or the need
to re-time the pump except the Rubber Covered
Rotor. Rubber covered rotors require 0.3 mm of shim
to be removed from behind the rotor case to ensure
the correct rotor front and rear clearances. When
changing rotors of any type it is always wise to check
clearances after reassembly.

Spare Parts

All rotors are available in pairs, see parts listed in the

Installation, Operating, Maintenance and Spares
Manual supplied with each pump.
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24 Series Lobe Pumps

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USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0252
Machine Translated by Google

24 Series Lobe Pumps

02/03

Single Shaft Seals

24 Series pumps are fitted with high quality mechanical
shaft seals to prevent leakage of product from the
pump into the atmosphere and to prevent contamination
by airborne micro-organisms. All pumps are available
Fig. 1 Single
with single face seals, and with flushed seals as an Mechanical Seal
option; see separate data sheet.

ï Simple cartridge design and set-up. ï

Small section gives lower cost. ï
Unique 'pistoning' function avoids the need for large
spring forces. ï
Externally mounted for maximum cleanliness. ï
Anti-rotation pin in seal seat allows use on high
viscosity products.
ï Variety of seal face combinations with same set-up Materials and Applications
dimensions. ï
Uses proprietary O-rings enabling 'off-the-shelf' spares Single seals are available in three face material
availability. ï combinations:
Positive drive pins allow bi-directional rotation.
Carbon on Stainless Steel - pinned seat code 8
Carbon on Stainless Steel - unpinned seat code 3
Seal Position and Design Tungsten-Carbide on Tungsten-Carbide code 2

This seal design is externally mounted into the rear of Shaft seals are made from the following materials -
the rotor case which means that the drive collar,
Standard Code 8 Seal Options - Code 2 & 3 Seals
locating screws and wave spring are outside of the Unpinned Carbon
product, this ensures that good hygiene levels may be Static Seal Face 316 Stainless Steel Tungsten Carbide
Silicon Carbide (special request)
achieved. The rotary seal face is driven by 2 pins that Carbon face inserted 316 Stainless Steel
locate in slots in the drive collar. This means that the Rotary Seal Face into 316 Stainless Tungsten Carbide
Steel Carrier Silicon Carbide (special request)
signal can be run equally well in both directions of Drive Necklace 303 Stainless Steel 303 Stainless Steel
rotation. The seal faces are energized by a simple Wave Spring 301 Stainless Steel Hastelloy (special request)
FDA Grade Viton
wave spring, which is used to keep the rotary and Seal O-Rings 3A Grade Nitrile PTFE encapsulated (on Viton core)
static seal faces in contact at low pressures. At higher Perfluroelastomer (Kalrez)
Drive Collar Set Screws 303 Stainless Steel 303 Stainless Steel
pressures the static seal seat 'pistons' backwards and
forces the rotary face, mounted on the shaft, back The code 8 single carbon on stainless-steel seal is
against the drive collar. suitable for many clean fluids which do not require a
more sophisticated seal type ie those which:
This compresses the wave spring and eliminates
fatigue of the spring. See Fig 1. ï Are non-toxic and non hazardous ï
Have some lubricating properties ï
Are not highly abrasive ï
Have a viscosity less than 150,000 cp ï
Do not require steam or sterile fluid (aseptic) barrier ï
Do not change state in contact with air ie do not form
a film, dry out or precipitate solids ï Are
pumped at a temperature less than 180C
(356F)
ï Are not excessively temperature sensitive (do not
degrade when heated by the friction of the seal faces)
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24 Series Lobe Pumps

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The code 3 single carbon on stainless steel seal

with unpinned seat is used in place of the code 8 Conversions and
pinned seat single carbon on stainless steel seal Interchangeability
where viscosity is less than 1800 cP and a lower cost
option is necessary. Pumps built with single seals can be converted as
follows:
The code 2 single tungsten-carbide on tungsten-
carbide seal is used where viscosities are higher ï To other face materials eg from code 8 to code 2,
than 150,000 cP and also where carbon is not simply by changing seal faces
acceptable in fluid contact or where face wear would ï To other elastomer materials. See Elastomers
be unacceptable, ie data sheet
ï To flushed signals. See appropriate data sheet.
ï For abrasive fluids containing crystals, powders or Conversion kits are available which contain all the
particles which would rapidly wear away the parts necessary to convert a single-seal pump to
carbon of the standard seal flushed seals
ï Where shedding of particles into the fluid stream
must be avoided. The seal faces are the only Refer to Installation, Operating and Maintenance
area in the pump design where rubbing contact is Manual for instructions on seal removal and fitting.
unavoidable. Tungsten carbide is extremely hard,
so the seal does not wear ie, particles are NOT If a pump build specification is changed at any time, the
shed into the product model number must be changed on the pump name
plate to ensure that correct spare parts will be ordered.
Refer to Pump Selection data sheet for more
information on signal selection.
Spare Parts
Note that code 2 tungsten-carbide on tungsten-carbide
seals are not recommended for steam-purged Single seal spare parts are supplied as:
applications as the seal faces can bind ï Seal Face kits - 2 kits required per pump
together. ï Trim kits containing all the elastomer parts for the
complete seal - 2 kits required per pump
Installation Procedure ï Wave springs supplied individually
ï Housings supplied individually

Pumps fitted with single seals require no special Refer to Spare Parts data sheets for part numbers.
installation but pumps must never be run completely dry
for more than 30 seconds as this will cause excessive
heating of the signal faces. Use flushed seals in pumps
that need to run dry. For seal installation and repair, refer
to Installation, Operation and Maintenance manual.

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0253
Machine Translated by Google

24 Series Lobe Pumps

02/03

Flushed Single Shaft Seals (not S2)

The flushed seals fitted to 24 Series pumps retain all They are used when
the features of the single seals, but with the facility to
contain a low pressure fluid behind the primary seal. ï Pumped fluid changes state in contact with air, eg
This allows the pump to be used for applications where crystallises, forms a film, dries out or precipitates
the single seal alone is unsuitable. This seal type is solids. The flush dissolves and rinses away the
not available on the S2 size pump. small amount of residue which could build up on
the edges of the seal faces
Seal Position and Design ï Pumped fluid is hot, ie over 80°C (175°F). The
flushing fluid is used to cool the seal faces ï
Pumped fluid is temperature sensitive and degrades
when heated by the shearing action of the seal
faces. The flushing fluid is used to cool the seal
faces ï Pump
must run ìdryî for prolonged periods (over 30 seconds),
ie no liquid in pump chamber
Fig. 1 - Flushed ï Pump is under high vacuum ï
Mechanical Seal A low pressure sterile barrier is required

The code 7 flushed Tungsten-carbide on Tungsten-

carbide seal is used where face wear would be
unacceptable, ie

ï For abrasive fluids containing crystals, powders or

particles which would rapidly wear away the carbon
The flushed seal uses a lip seal mounted behind the of the code 5 or 9 seal
primary seal - Fig 1. This is fitted into the back of the ï Where shedding of particles into the fluid stream
seal housing and runs on the shaft. In use the space must be avoided
between the primary and lip seals is fed with fluid
supplied through pipes connected to drilled holes in Refer to Pump Selection data sheet for more
the seal housing. This seal type uses a removable information on seal selection.
shaft sleeve to avoid wearing of the shaft by the lip
seal. Installation Procedure
Materials and Applications A low-pressure flushing fluid system must be installed
as follows:-

Flushed seals are available in three face material ï Liquid must be compatible with the pumped fluid;
combinations: water is the most commonly used liquid
ï Pressure shall typically be 0.5 bar (7 psi) gauge ï
Carbon on Stainless Steel - unpinned seat code 5 Flush temperature shall be below its boiling point, ie
Tungsten-carbide on Tungsten-carbide code 7 maximum of 70C (160F) for water. ï
Carbon on Stainless steel code 9 Flow rate should preferably be 2 to 3 liters/min. (0.5
to 0.75 US gal/min) per seal
The lip seals are always nitrile. ï Flush fluid should be connected to flow in at the
lowest point on the seal housing and out at the
Flushed seals are run with a low-pressure liquid flush highest point to vent air pockets, as shown in Fig.
between the primary seal (mechanical face seal) and 2 (overleaf).
a lip seal to form a barrier between the pump and the
atmosphere.
Machine Translated by Google

24 Series Lobe Pumps

02/03

Spare Parts
Flushed Single Shaft Seal spare parts are supplied
ace:

ï Seal Face kits - 2 kits required per pump

ï Lip Seals - 2 required per pump
ï Seal trim kits containing all the elastomer parts for
the complete seal - 2 kits required per pump
ï Wave springs supplied individually
ï Housings supplied individually
ï Drive plates supplied individually

When servicing seals, it is not normally necessary to fit

new springs and housing. Drive plates should be
Fig. 2 inspected for wear and replaced as necessary.
Ensure that the correct elastomer trim kits are ordered
For seal installation and repair, refer to installation, for the application.
operation and maintenance manual.
Refer to Spare Parts data sheets for part numbers.

Conversions and
Interchangeability
Pumps built with flushed seals can be converted as
follows:

ï To other face materials eg from code 5 to code 7

ï To other elastomer materials, see Elastomers
data sheet
ï To single seals, simply by removing the lip seal

Refer to Installation, Operating and Maintenance

Manual for instructions on seal removal and fitting.

If a pump build specification is changed at any time, the

model number must be changed on the pump nameplate
to ensure that correct spare parts will be ordered.

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0254
Machine Translated by Google

24 Series Lobe Pumps

02/03

Packed Gland
The packed gland is the most economical and versatile Materials of Construction:-
sealing arrangement. Compression packing is used Packing ring - Aramid fiber impregnated
when handling a wide variety of products of differing with food grade grease
viscosities and other physical properties. Number of rings - S2 pump- 2 rings per shaft
A1 to D2 pumps - 3 rings per
shaft
Design E2 pump- 4 rings per shaft
Gland Follower - 316 Stainless Steel
The function of a packed gland is such that the Shaft Sleeve - Hard Chrome plated
compression of the packing rings in an axial direction stainless steel (not S2)
ie reduction in the axial width of each ring causes an
increase in the ring sections across their diameter thus
causing a sealing effect between the shaft and the
Applications
housing. The rings remain static in their housing due
to a lower torsional effect at their outer diameter ie the Typical products sealed with gland packing are those
shaft rotates within the packing rings. The compression where the alternative would be an expensive
of the rings is effected by the use of a gland follower mechanical seal and support systems eg:
that is clamped onto the rings by two clamping nuts.
ï Chocolate - requires double mechanical seal and
pressurized food grade oil flushing system
The rotation of the shaft within the packing rings ï Chemicals - often requires double mechanical seal
causes frictional heat to build up. It is necessary, and pressurized flushing system ï
therefore, to allow a small leakage of product between Chemicals - often requires exotic mechanical
the packing rings and the shaft to dissipate this heat seals and elastomer components
ie the product being pumped is used to 'lubricate' the
packing. This leakage should be small and can be Gland packing SHOULD NOT BE USED WHEN there
controlled by adjusting the clamping force from the are large variations in differential pressure across the
two nuts. The packing rings on A1 through to E2 size pump. This causes excessive leakage when pressures
pumps run on a hardened shaft-sleeve that is easily are high which can be countered by increasing the
removed and replaced when it becomes excessively clamping force on the gland follower.
worn. However, when the pressure drops the extra
compression created by the increased clamping force
causes a loss of lubrication of the packing rings and
subsequent 'burning up' of the rings (hardening) which
itself results in excessive leakage occurring.

Installation

No special installation or additional services are

required.

Fig. 1 - Packed Gland

Machine Translated by Google

24 Series Lobe Pumps

02/03

Conversions and
Interchangeability
It is not possible to easily convert mechanical seal
pumps to gland packing because the shafts need to
be changed to allow fitment of the shaft sleeves on
A1 to E2 size pumps. Removal of the shafts would
need to complete strip down of the pump
bearing housing, which would be uneconomical to
do. Further, on all pump types it is not possible to run
the packing directly on stainless steel shafts where a
mechanical seal has previously been fitted. This is
because the shaft is 'dimpled' for the set-screws in
the drive collar used to drive the mechanical shaft
signal. This dimple would tear up the packing rings.
Pumps fitted with Packed Gland can be converted to
mechanical seals provide that the shaft or shaft
sleeves are not worn on the area under the packing
rings. Simply remove the packed gland housing and
'dimple' the shafts or shaft sleeves (where fitted) in
the appropriate place (see instruction leaflet supplied
with the mechanical seals for position to 'dimple the
shaft/sleeve).

Spare Parts

ï Individual packing rings

ï Shaft sleeves (where used)
ï Gland housings
ï O-rings used to seal the housing to rotor case
ï Gland clamp nuts and studs

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0255
Machine Translated by Google

24 Series Lobe Pumps

02/03

Single ëOí Ring Seals (not for S2 or E2)

This seal is designed as a low cost shaft-sealing These seals must be used in conjunction with
device and uses a single Nitrile O-ring working under normal chemical resistance guidelines and
dynamic conditions. This seal is not available on S2 should not be allowed to run dry. ie without
or E2 Size Pumps. product in the pump.

Seal Position and Design Installation Procedure

The O-ring is housed in a removable housing mounted
to the rear of the rotor case in the same way as the The single O-ring can be installed very easily without
mechanical face type seals. A removable sleeve is any rotor case modification. (See Installation,
fitted onto the shaft and rotates with the shaft. The O- Operating and Maintenance manual). Once installed
ring remains static in the housing and the sleeve the primary sealing O-ring can be removed from the
rotates against the inner diameter of the O-ring. See rear of the pump. If it becomes necessary, the sleeve
Fig. 1 upon which the O-ring runs can also be removed and
replaced.
Materials and Applications
Conversion and
This type of seal can be used for products that are
non-abrasive and have some lubricating properties of Interchangeability
their own. eg oil based products. Because of the
narrow sealing surface that the O-ring presents The single O-ring seal is fully interchangeable with all
against the sleeve, it can also be used for products mechanical seal types without any modification to
that have a tendency to polymerize (ball up). This other components, eg rotor case. See spare parts list
polymerization occurs due to frictional heat generated for conversion kit. However, if the wear sleeve is
between the faces of a normal mechanical face type required this will necessitate new shafts being fitted.
seal and would require a double mechanical seal
system with an expensive pressurized flushing
system. The O-ring seal does not need this expensive flushing system.

Maximum Operating Conditions:-

PUMP A1 A2 B1 B2 C1 C2 D1 D2
Max. Pres. 7.5 6.0 6.7 6.0 6.0 6.0 5.0 5.0
- bar (psi) (110) (87) (97) (87) (87) (87) (73) (73)
Max. Pump 650 650 500 500 350 350 350 350
Speed - rpm
Temp.
0 to 100C (32 to 212F)
C (F)

Typical products are: -

ï Milk ï Fig. 1 - O-ring Seal
Yoghurt ï
Dairy creams ï
Latex
It has also been found to give excellent results
with:-
ï Jams (conserves) ï
Glucose solutions
Machine Translated by Google

24 Series Lobe Pumps

02/03

Spare Parts
It is important to establish O-ring lifetime by trials and
a planned O-ring replacement program initiated.
Due to the low costs and ease with which the O-rings
can be changed this replacement program can
easily be coordinated with regular manual cleaning
or inspection. Spare O-rings can be supplied. (See
spare parts list).

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0256
Machine Translated by Google

24 Series Lobe Pumps

02/03

Elastomers
In a 24 Series pump there are 11 sealing O-rings in Perfluoroelastomer - Often referred to as KalrezÆ,
contact with the pumped fluid (See Fig. 1). Great care this being the original version of this material. Others
is taken in the manufacture of the O-rings to ensure now available are ChemrazÆ and IsolastÆ.
that there are no imperfections on the surfaces which Perfluoroelastomer is resistant to virtually all chemicals
can harbor bacteria and the design of the molds is and is sometimes seen as an ìelastomeric version of
such that there is no molding flash on critical sealing PTFEî. Due to its superior chemical resistance and
edges. the difficult manufacturing techniques required to
manufacture it, it is also very expensive around 100
times the price of Nitrile and 10 times the price of
Materials and Standards PTFE. Never-the-less, in some circumstances it is the
only alternative. 24 Series pumps fitted with
24 Series pumps can be specified with up to 4 Perfluoroelastomer O-rings have a solid PTFE end
alternative sealing materials: cover O-ring due to its large size and therefore cost, it
is also the most easy to replace.
Nitrile - This 3A-grade nitrile has a good balance of Where absolutely necessary this end cover O-ring can
properties and is resistant to many chemicals as also be supplied in Perfluoroelastomer (by special
well as oil and fat-based products. request).

model
EPDM - This peroxide cured grade of EPDM conforms temperature Conformance
Material number
to the requirements of the US FDA Code of Federal Range to Standards
Suffix
Regulations Title 21 section 177.2600 ìRubber Nitrile
-30 to +110C
US 3-A 18-03 None
Articles Intended for Repeated Useî. This material -22 to +230F
-35 to +140C
is chosen for its excellent resistance to water-based EPDM
-31 to +285F
US FDA CFR 21 177.2600 E

solutions, and particularly to hot water and steam, VitonÆ

-25 to +180C
US FDA CFR 21 177.2600 V
-13 to +355F
and also for its acceptability in contact with
-20 to +180C
pharmaceutical products, foods etc. EPDM is not PTFE US FDA CFR 21 177.1550 P
-4 to +355F
suitable for contact with mineral oils. Perfluoroelastomer - 50 to + 280C
None K
(KalrezÆ or similar) - 58 to + 536F

For full details of material compatibility, refer to Jabsco

VitonÆ - generic name FPM This grade of VitonÆ Liquid Compatibility Guide, publication number SD932.
conforms to the requirements of the US FDA Code
of Federal Regulations Title 21 section 177.2600
ìRubber Articles Intended for Repeated Useî. This
VitonÆ has excellent resistance to many chemicals, Conversions and
oils and solvents and also has a wide operating
temperature range.
Interchangeability
Pumps can easily be converted to other elastomer
PTFE - often called TeflonÆ. PTFE has exceptional specifications by ordering a complete pump head trim
resistance to chemicals. 24 Series pumps use a kit. Refer to Installation, Operating and Maintenance
PTFE encapsulated VitonÆ O-ring to seal the static Manual for instructions on seal removal and fitting.
seal face to the rotor case and the rotors seal face
to the shaft. The end cover joint is a solid O-ring. If a pump build specification is changed at any time,
The shaft sleeve, rotor bolt and rotor O-rings are the model number must be changed on the pump
also made from solid PTFE. Note that PTFE nameplate to ensure that correct spare parts will be
components must be replaced regularly especially ordered.
if subjected to wide temperature variations. All solid
PTFE components conform to the US FDA Code
of Federal Regulations Title 21 section 177.1550,
See Fig. 3 overleaf.
Machine Translated by Google

24 Series Lobe Pumps

02/03

Spare Parts

Elastomer spares can be ordered as :

ï Pump Head trim kit - consists of all the elastomer
parts required for one complete pump.

All O-rings can be supplied individually.

Refer to spare parts data sheets for part numbers.

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0257
Machine Translated by Google

24 Series Lobe Pumps

02/03

End Covers
The 24 Series end cover is sealed to the rotor case by
an O-ring in a groove precisely-machined in the end-
cover which minimizes product retention and assists in
effective CIP - Fig. 1. The end cover is held in place by
bolts and can easily be removed for inspection of the
pump head and for servicing. There are 4 slots on the
sides of the cover to aid removal especially when sticky
products have been pumped.

Fig. 1

There are 3 other alternative end cover types

available, all of which are completely interchangeable
with the standard cover
These are :-
ï End cover relief valve ï
Temperature Control Jackets
- End cover jacket
- Pump head jackets

End Cover Relief Valve

See separate data sheet - Relief Valve.

End Cover Temperature

Control Jackets
See separate data sheet - Temperature Control
Jackets.
Machine Translated by Google

24 Series Lobe Pumps

02/03

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 989 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0258
Machine Translated by Google

24 Series Lobe Pumps

02/03

End Cover Relief Valve (not S2 or E2)

24 Series pumps can be fitted with an end cover relief
valve which can be set to protect the PUMP ONLY
from overpressure. This valve is not designed to
protect the system or to provide long term by-pass of
liquid. If this is required then an IN-LINE relief valve
should be fitted which can by-pass the liquid back to
the suction vessel during overpressure situations.
Features of the end cover relief valve include:

ï Simple pump protection device

ï Easy to fit and to set
ï No dead read or by-pass loops Fig. 1
ï 80% ëcrackí pressure, no seeing ï
Full by-pass of liquids up to 5,000 cP
Materials and Operation
Position and Design Parameters

The relief valve is simply fitted onto the rotor case

(pump body) in place of the standard end cover. In Diaphragm - Food grade 3A Nitrile
order to achieve the best operating parameters the - PTFE faced fluoroelastomer
valve is designed to operate in ONE DIRECTION
ONLY. Housing - 316 Stainless Steel
Spring -Stainless Steel
The function is as follows ñ a channel is connected
between the discharge side of the pump and the Max Temp - Nitrile +110 C
center of the diaphragm. Behind the diaphragm is a - PTFE +200 C
spring loaded piston. As the pressure on the discharge Max Pressure - 15 bar (215 PSI)
side of the pump increases it reaches a point where Max Viscosity - Dependent on flow through pump.
the spring load is overcome. At this point the Up to 5000 cP if full capacity of
diaphragm is lifted off of your seat. This exposes the pump required. Greater viscosities
full area of the diaphragm to the discharge pressure are possible at lower flow rates or
which in turn increases the load to the piston by a if product is shear thinning.
factor 5 or more. Due to this sudden increase in load Installation Procedure
the valve opens fully and allows the product to by-
pass back to the suction side of the pump via another
channel. The valve does not close again until the The valve will only work in one direction of flow, a
discharge pressure drops to approx 10% of the ëDirection of Flowí arrow is attached to the cover.
pressure required to crack open the valve. It may be The cover MUST be fitted with this arrow facing in the
necessary to stop the pump. correct direction. The procedure for setting the opening
pressure of the valve is shown in the Installation,
The spring load can be manually adjusted to give Operating and Maintenance Manual.
different opening pressures of the valve up to the
maximum pressure capability of the pump. See Fig. 1. Spare Parts

Parts are available as individual items or as a kit of

parts (O-ring and Diaphragm)
Refer to Spare Parts data sheets for part numbers.
Machine Translated by Google

24 Series Lobe Pumps

02/03

Pump A1 A2 B1 B2 C1 C2 D1 D2
Dim A (cm) 157 165 191 198 267 276 327 339
Dim A (inch) 6.2 6.5 7.5 7.8 10.5 11 12.9 13.5

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0259
Machine Translated by Google

24 Series Lobe Pumps

02/03

Port Connections
24 Series are available with a wide variety of port types. Port Connection types available for Ordering
S2 to D2 24 Series Pumps code
Tri-Clamp - BS 4825 : Part 3 1
Male screwed BS parallel pipe thread to 2
BS 2779 DIN 259, ISO 7/1:1982
ISS/IDF (International Dairy Federation) 3
to ISO 2853 - BS 4825: Part 4
RJT (British Milk) to BS 4825: Part 5 4
3A Acme Bevel Seat 5
DIN 11851 6
SMS 1146 7
NPT male screwed taper pipe thread - 9
ANSI B2.1

Fig. 1 - Standard Port

For E2 port types see over.
The S2 pump differs slightly in that the port connection
is a BSP INTERNAL THREADED design.
Where hygienic connections are required additional
port connectors are screwed into this BSP thread.
The port connector is sealed on its basis to ensure
that no product comes in contact with the BSP thread,
thus ensuring maximum cleanliness, See Fig.
2.

Fig. 2 - S2 Port

In many cases (A1 to D1 size pumps) a second size

of port is available. This is one size larger than the
standard port size and allows the pump to be coupled
to larger pipes without the need of adapter pieces.
Thus reducing the installed cost of the pump.
Machine Translated by Google

24 Series Lobe Pumps

02/03

Port types for S2 to D2 size pumps

code Size Port Size - Inch or millimeter as appropriate

Type
S2 A1 A2/B1 B2/C1 C2/D1 D2
standard 1 1 1 2 3 4
1 Tri-Clamp ~ ~
Enlarged 1 2 3 4
standard 1 1 1 2 3 4
2 BSP (male) ~ ~
Enlarged 1 2 3 4

3 IDF Standard 1 (25) 1 (25) 1 (38) 2 2 (51) 3 (76.1) 4 (101.6)

~ ~
Enlarged 1 (38) 1 (51) 1 3 (76.1) 4 (101.6) 2
RJT standard 1 1 334 4
4 ~ ~
(British Milk) Enlarged 2
standard 1 1 1 2 3 4
5 3A Bevel Seat ~ ~
Enlarged 1 2 3 4
standard 25 25 40 fifty 80 4
6 DIN ~ ~
Enlarged 40 fifty 80 100
standard 25 25 38 51 76 4
7 SMS ~ ~
Enlarged 38 51 76 108
standard 1 4
9 NPT (male) ~ ~
Enlarged eleven 12 23 3. 4

Port types for E2 pumps only

code Type Port Size

1 British Standard Flange to BS 10 Table E 6 inch
2 ASA 150lb Raised Face Flange 6 inch
3 DIN Flange to DIN 2566 (NP16) 150mm
6 DIN threaded connection to DIN 11851 150mm

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0260
Machine Translated by Google

24 Series Lobe Pumps

02/03

Temperature-Control Jackets (not E2)

Pumps are available with 2 different types of and this cover is drilled through to allow a suitable
Temperature Control Jackets. These allow hot water temperature controlled medium to be passed through
or steam to be piped to the pump to maintain product these channels.
temperature in the pump or to heat the pump prior to
starting. This is used to: Application limits are:

ï Prevent product from degrading, separating or Jacket Pressure: 2 bar (30 psi).
crystallizing due to cooling in the pump. Temperature: 130C (265F).
ï Protect the pump from the risk of starting up full of
solidified product. A1 A2 B1 B2 C1 C2 D1 D2
Pump Sizes
ï Maintain product viscosity in the process to avoid TO 50 (2") 58 (2.3") 62 (2.45") 69 (2.7") 84 (3.3") 96 (3.8") 102 (4") 114 (4.5")
32 (1.25") 32 (1.25") 37 (1.45") 37 (1.45") 57 (2.25") 57 (2.25") 65 (2.55") 65 (2.55")
excessive pressures. B (connection
º BSP º BSP º BSP º BSP º BSP º BSP º BSP º BSP
size)

Alternatively, cold liquid can be piped through the

jacket to counteract heating of product within the TO

c
pump. This is particularly useful for:

ï Steam or hot water aseptic barrier applications

where the barrier fluid will add heat to the process.
ï Continuous re-circulation applications where the
pumping action adds pressure energy to the liquid
b
every time it passes through the pump.

TYPES OF JACKET :- b

End Cover Jacket :-

Use for non-critical products

Pump Head Jackets :-

Fig. 1
Use for products where good temperature control
is required

End Cover Jacket (Fig. 1)

The jacket is manufactured from 316 grade stainless

steel. It is fitted to the center of the end cover and
offers a low cost option for a moderate control of the
pump head temperature. It can be used for products
that are of a non-critical nature: ie have a wide
temperature control band. The jacket does not give
good penetration to the shaft seals, this can be
accomplished by utilizing a flushed seal with a
Suitable temperature controlled flushing media.
Alternatively Pump Head Jackets can be used.
The jacket liquid never comes into contact with the
pumped product, so there is no risk of contamination.
The S2 size pump uses a different variation of end
cover jacket. In this case a thicker end cover is used
Machine Translated by Google

24 Series Lobe Pumps

02/03

Pump Size A1 A2 B1 B2 C1 C2
Pump Head Jackets (Fig. 2) TO 55 55 69 69 81 81
b 148 148 166.2 166.2 181.8 181.8
These are fitted to the top and bottom of the end c 53 59 59 67.5 74.9 95.5
Connection D º BSP º BSP º BSP º BSP º BSP º BSP
covered and sealed with Viton O-rings. They give good
*
temperature control of the entire pump head. Not available on D & E size pumps
Temperature penetration is higher than conventional
ësaddlesí mounted on the top and the bottom of the Installation Procedure
rotor case because the temperature is absorbed
directly into the rotor case and NOT into the bearing Pumps fitted with any type of jacket should be
housing (bearing frame). This type of temperature installed such that air pockets are avoided. This is
control device can be used for products which require best achieved by a) individual feed to the lowest point
moderately tight control of temperature band. The of each jacket, b) feed to the lowest jacket or
shaft seal is also temperature controlled to a connection from which feed into the highest jacket
moderate degree. However, if higher temperature should be applied.
control is required then additional seal flushing with a
suitable temperature controlled liquid should be
used. The design of the Pump Head Jacket allows
installation with an End Cover Relief Valve (if
available).

In a similar way to the end cover jackets used on

the S2 pump, the S2 pump also uses pump head
jackets which are not fitted to the end cover, but are
drillings through the rear of the rotor case.

Jacket Material 316 Stainless Steel

Material of O-rings Viton
temperature 130C (265F)
Pressure 2 bar (30psi)

Fig. 2

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0261
Machine Translated by Google

24 Series Lobe Pumps

02/03

Surface Finishes
24 Series pumps are available with three alternative
finishes for all fluid-contact surfaces ie rotors, internal
Mechanical Polish Option
surfaces of rotor case and end cover, port bores. Users requiring the very highest standards of purity can
specify mechanical polishing. All product contact
surfaces are polished to a surface finish of 0.5 microns
Finish Surface Approx grit Ordering Ra, (equivalent to 20 microinches Ra and approximating
Roughness equivalent suffix code to 240 grit finish) and then electropolished. The
Standard 0.8 µ Ra 150 Machined (32 none
advantages of this are:-
microinch)
Electropolish 0.8 µ Ra 180 AND
a) Improved cleanability. Due to the virtual elimination
(32 microinch) of crevices, even micro-biological particles cannot
Mechanical 0.5 µ Ra 240 Z
become trapped, ie "held up" on the surface during
Polish (20 microinch) cleaning

Standard Finish b) Less product damage. The removal of the small but
sharp surface peaks left by machining operations
Product contact surfaces are machined to 0.8 micron
reduces damage, particularly to cellular products
Ra (32 micro inch). This conforms to the current
requirements of US 3A Standard 02-09. This is accepted
by many users as adequate for hygienic applications. All product contact surfaces are polished with silicon
carbide abrasive. The last grit used is 240 grit or finer
and results in a surface roughness of 0.5 micron Ra.
The polishing process is controlled to remove the
Electropolish Option minimum amount of material from the component
surfaces consistent with achieving the above
Some users, particularly in the pharmaceutical requirements. Surface contours are maintained and
industries, specify electropolish and although the square corners are not rounded thus minimizing loss of
measurable change on surface roughness after pump performance. Following mechanical polishing,
electropolishing is small, the effects are:- components are electropolished on all surfaces.

a) Rounding and smoothing of surface imperfections -

thus reducing the ability of product to adhere to the Users should be aware that, although polishing
surface or be damaged by the sharp protrusions on improves the flow through valves, pipes, etc. it reduces
the surface. the output from a positive-displacement pump when
pumping low-viscosity liquids. Polishing increases
b) Cleaning and passivating the surface - improves slippage so the pump needs to be run faster to
corrosion resistance and prevents the release of compensate. This may be undesirable as it can result
surface impurities into the product. in greater shear stress and greater shear damage to
the liquid. It is possible that the additional shear damage
Components having product-contact surfaces are to delicate liquids resulting from the extra slippage can
electropolished all over and therefore give improved outweigh the benefits of polishing.
external cleanability. Also, an unnecessarily large pump may be needed to
compensate for the loss of output.
Machine Translated by Google

24 Series Lobe Pumps

02/03

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0262
Machine Translated by Google

24 Series Lobe Pumps

02/03

Manual Cleaning (COP) & Cleaning In Place (CIP)

Organic materials such as oils, fats, proteins need a
Cleaning of Process Equipment different system to inorganic materials such as
mineral salts. Detergent manufacturers can give
In many applications, not only in the hygienic advice on the correct use of chemicals and
industries (food, pharmaceutical etc) but also in temperature. CIP usually needs a velocity of 1.5
chemical and industrial duties, fast and effective m/sec (5 ft/sec) through the pipeline to achieve the
cleaning is important. Living contaminants such as turbulent flow required.
bacteria and other organisms must not be introduced
or allowed to multiply and all traces of fluid must be
removed at the end of a batch, process or at product Choice Of Cleaning
changeover to prevent any intermixing. Processes
Manual cleaning has the advantage that no special
How Clean Is Clean? pipework and CIP equipment (tank, heater etc) are
needed. But CIP is becoming much more common
In order to clean a pump or other piece of 'closed' as there are many advantages of CIP over manual
equipment, it must either be dismantled (manual cleaning. The 24 Series range of pumps is designed
cleaning or Clean Out of Place - COP), or cleaned in for manual cleaning and will also achieve Levels 1 &
place (CIP) as part of the procedure for cleaning the 2 of CIP (see chart opposite).
entire process. The higher the standard required, the
more sophisticated the cleaning process. The
standard (level) of cleaning required depends on the
Procedure For Manual
needs of the process. There are four generally Cleaning (COP)
recognized levels:
level
User's Level of See Installation, Operating and Maintenance Manual
Requirement Cleaning for procedures to dismantle and re-assemble fluid
To prevent intermixing of, for Visually Clean. Manual cleaning or simple
1 example, paints, dyes, inert CIP contact parts. 24 Series pumps are designed to be
chemicals at product change-over. stripped easily for cleaning manually.
Food processes for ingredients, Hygienic, with small but
2 pre-pasteurisation, stable foods acceptable levels of bacteria Take care not to scratch or damage pump parts
and short storage life. remaining. Rigorous manual
cleaning, or ordinary CIP. especially signal faces. Do not use steel abrasive wool
After pasteurisation, medicines, Semi (pseudo) sterile. No or or brushes on fluid wetted surfaces as particles may
unstable and long shelf-life foods, almost no micro-organisms
3
multi-product chemicals facilities. remaining in the pump. Can only become embedded in the surface and cause
be achieved with CIP. corrosion.
Sterile pharmaceuticals Truly sterile. Absolutely no living
4 manufacture, bio-technology. organisms remaining in the pump,
guaranteed every time. CIP Use suitable cleaning agents in accordance with their
followed by SIP (sterilise in place)
manufacturer's instructions regarding temperatures,
dilutions, skin contact precautions and other safety
Cleaning Systems information. Thoroughly clean all fluid contact
surfaces and rinse as required. As a minimum it will
The type of cleaning system used depends partly on be necessary to remove the end cover and rotors and
the level of cleaning required but also on what is to stationary seal faces. It should not be necessary to
be removed. Cleaning, whether mechanical or CIP, remove the seal rotating seats from the rotors during
depends on a combination of: routine cleaning.
Chemical Reaction Detergents, acid, alkalis
Scouring Action Turbulant flow, scrubbing
heat hot water
time Residence time for cleaning
liquids in contact
Machine Translated by Google

24 Series Lobe Pumps

02/03

If using a separate pump to circulate CIP fluids,

Procedures For the lobe pump may need to be rotated at a
Cleaning In Place (CIP) sufficiently high speed to allow the fluid to pass
freely through. If sufficient pipe velocity cannot be
Each pump is supplied in a generally clean condition achieved, fit a by-pass loop to divert excess flow
but it is the responsibility of the user to establish past pump.
suitable cleaning and sterilizing regimes appropriate
to the fluid and process. These should be implemented CIP fluid pressures must equal or exceed process
before the pump is first used and as often as required pressure at all points in the system to ensure fluid
thereafter. The following guidelines will help with reaches all contact surfaces. It may be necessary
effective cleaning of 24 Series pumps and minimize to restrict flow in discharge pipework to achieve
risk of damage to the pump. this but do not exceed differential pressure and
temperatures shown on pump Performance Data
1. Rinse through system with a suitable liquid, usually Sheet. A minimum differential pressure of 1 bar is
water at approximately 50C (120F), as soon as recommended for effective cleaning.
possible after completion of process to remove
bulk of residues before they dry onto surfaces. 5. After CIP, rinse through with neutralizers and clean
water to remove all traces of cleaning agents. Do
not pass cold liquid through pump immediately
2. If CIP will not be carried out immediately after after hot - allow temperature to change slowly.
rinsing, leave pump and system full of rinse liquid. Failure to observe can result in pump seizure.

3. Choose chemical cleaning agents to suit the nature

of the contamination to be removed and use them This information is provided for guidance only. It is
in accordance with manufacturer's recommended the responsibility of the pump user to satisfy himself
dilution, temperature and circulation time but do that the CIP protocol chosen is adequate to achieve
not exceed 90C (195F). the desired levels of cleanliness and Jabsco cannot
Confirm compatibility with pump materials of accept any responsibility for contamination or loss of
construction. pumped fluids.

4. CIP fluid flow should result in a mean pipeline

velocity of at least 1.5 m/sec. (5 ft/sec).

If using the lobe pump to circulate the CIP fluid,

refer to the Performance Data Sheet for pump
speed to give required flow, taking account of
pressure losses through pipework. Note that all
pumps are more susceptible to cavitation when
pumping hot liquids. Ensure adequate Net Inlet
Pressure available.

USES UK GERMANY

Jabsco Jabsco Jabsco GmbH

20 Icon Bingley Road Oststrasse 28
Foothill Ranch Hoddesdon 22844 Norderstedt
CA 92610 Hertfordshire, EN11 0BU

Tel: +1 949 859 4945 Tel: +44 (0) 1992 450 145 Tel: +49 (0) 40 53 53 73 0
Fax: +1 949 859 1153 Fax: +44 (0) 1992 467 132 Fax: +49 (0) 40 53 53 73 11

Warranty: All products of the company are sold and all services of the company are offered subject to the company's warranty and terms and conditions of sale, copies of which will be furnished upon request.
The information provided here is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2000 ITT Industries - Jabsco 43010-0263