Serie 620
Serie 620
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL
INJURY AND PROPERTY DAMAGE.
This document and other information from Parker Hannifin Corporation, its subsidiaries and authorized distributors provide product and/or system options for further investigation by users
having technical expertise. It is important that you analyze all aspects of your application and review the information concerning the product or system in the current product catalog. Due
to the variety of operating conditions and applications for these products or systems, the user, through its own analysis and testing, is solely responsible for making the final selection of
the products and systems and assuring that all performance, safety and warning requirements of the application are met.
The products described herein, including without limitation, product features, specifications, designs, availability and pricing, are subject to change by Parker Hannifin Corporation and its
subsidiaries at any time without notice.
Offer of Sale
The items described in this document are hereby offered for sale by Parker Hannifin Corporation, its subsidiaries or its authorized distributors. This offer and its acceptance are governed
by the provisions stated in the “Offer of Sale”.
© Copyright 2003, Parker Hannifin Corporation, All Rights Reserved.
Table of Contents
SERIES 620 CAST IRON: Valve Options For Motors ........................................................... 20
Description and Characteristics ...................................................... 3 Single Pressure Relief Valve with Anti-Cavitaion ................... 20
Cross Port Pressure Relief Valve with Anti-Cavitation .......... 20
PGP/PGM 620
Solenoid Unloading Pressure Relief Valve for Motors ........... 21
Features of PGP620/PGM620 ........................................................ 4
Check Valve and Restrictor ......................................................... 21
Ordering Code .................................................................................. 5
Specifications .................................................................................. 6 Offer of Sale ..................................................................................... 22
Dimensions ....................................................................................... 7
Mounting Flange Options ............................................................... 8
Port Options ...................................................................................... 9
Drive Shaft Options ....................................................................... 11
Performance Data ......................................................................... 13
Pump/Motor Products
PGP/PGM 620
• 41 gpm @ 3,000 rpm
• Pressures to 275 bar
• Speeds to 3500 RPM
PGP/PGM 620
Parker Hydraulics has supplied gear pumps and motors
to worldwide mobile and industrial markets for many
years, especially material handling, turf care, and
construction equipment applications. Many Parker
pumps and motors have been developed and tested for
the specific needs of these industries. PGP 620
Characteristics
Product Features Description Product Features Description
Pump type Heavy-duty, cast iron, external gear. Fluid viscosity Range of operating viscosity
20 to 100 mm²/s.
Mounting SAE, Rectangular. Specials on request. Max. operating viscosity should
Ports SAE and metric split flanges and others. not exceed 1000 mm²/s.
Recommended min. viscosity 8 mm²/s.
Shaft style SAE splined, keyed, tapered, cylindrical.
Specials on request. Range of ambient
temperature -40°C - +70°C
Speed 500 - 3500 rpm, see tables.
Filtration According to ISO 4406 Cl. 16/13
Theor. displacem. See tables
Flow velocity See tables.
Drive Drive direct with flexible coupling
is recommended. Direction of rotation Clockwise, counter-clockwise or double.
Inlet pressure Operating range absolute pressure Multiple pump - Available in two or three section
0.8 to 2 bar. Absolute minimum inlet assemblies configurations.
pressure 0.5 bar, short time without load. - Max. shaft loading must conform to
Consultation is recommended. the limitations shown in the Shaft Load
Rating table in this catalog.
Outlet pressure See tables - The max. load is determined by adding
Axial / Radial load Axial or Radial loading is not allowed. the torque values for each pumping
section that will be simultaneously
Hydraulic fluids Mineral oil loaded.
Fire resistant fluids:
- water-oil emulsions 60/40, HFB Separate or common Separate Inlet configuration:
- water-glycol, HFC inlet capability - Each gear housing has individual inlet
- phosphate-esters, HFD and outlet ports.
Engineering approval is recommended. Common Inlet configuration:
- Two or more gear sets share
Fluid temperature Range of operating temperature a common inlet.
-15 to +80°C. Max. permissible
operating pressure dependent on fluid
temperature. Temperature for cold start
-20 to -15°C at speed ≤ 1500 rpm.
Max. permissible operating pressure
dependent on fluid temperature.
PG 620 620
Single Unit PGP/PGM 620 Inch equivalents for millimeter dimensions are shown in (**).
20.32
(0.8)
(5.6)
(0.8)
Tandem Unit PGP/PGM 620 Inch equivalents for millimeter dimensions are shown in (**).
20.32
(0.8)
(5.6)
PGP/PGM 620 Mounting Flange Inch equivalents for millimeter dimensions are shown in (**).
Code A3 Code A4
118
14 (4.65)
(0.55) 147
9.4 44.9 44.9 14
(5.79)
(0.37) (1.77) (1.77) 9.7 (0.55) 57.25 57.25
(0.38) (2.25) (2.25)
(1.77)
44.9
(4.76)
Ø 101.6 -0.05
121
(2.25)
57.25
(0.56)
(4.0)
Ø 14.3
Ø 127 -0.05
(4.61)
151.1
(1.77)
(5.9)
44.9
151
(6.54)
166.1
(5.0)
(0.8)
20.3
(0.56)
Ø 14.3
(2.25)
57.25
(0.80)
20.3
55.5 108
(2.19) (4.25)
55.5
(2.2)
Code D7 Code H2
132 max.
12 (5.2)
122
(4.8) 6.4 (0.47) 106.4
5.1 21.5 98.4 (0.25) (4.2)
(0.03) (0.85) (3.87)
(1.87)
47.5
Ø 82.55 -0.05
(2.16)
54.9
(1.68)
42.65
(3.25)
(5.54)
(0.43)
140.6
Ø 11
(5.03)
20.3
(0.8)
128
(5.98)
152
(0.8)
20.3
Ø 50.77 -0.05
(2.0)
55.5 108
(2.12) (4.25)
55.5 Ø 12.5
(2.19) (0.49)
Code H3
176.2 max.
14
(6.94)
5.1 (0.55) 146
(0.2) (5.75)
(2.38)
60.5
Ø 101.6 -0.05
(5.95)
151.1
(4.0)
Ø 14.3
(0.56)
(0.80)
20.3
108
55.5 (4.25)
(2.19)
PGP/PGM 620 Porting Inch equivalents for millimeter dimensions are shown in (**).
T2
T2
W W
ØB
ØB
C
C
Code D Code E
SAE straight thread BSP - thread
G1 G1
T1
T1
N1 5/16-18 UNC 12.7 38.10 17.48 15.0 E3 1/2-14 BSP 14.0 (0.55)
(0.5) (1.5) (0.69) (0.59)
E4 5/8-14 BSP 16.3 (0.64)
N2 3/8-16 UNC 19.0 47.63 22.23 14.0
(0.75) (1.88) (0.88) (0.55) E5 3/4-16 BSP 16.0 (0.63)
N3 3/8-16 UNC 25.4 52.37 26.19 20.6 E6 1-11 BSP 18.0 (0.71)
(1.0) (2.06) (1.03) (0.81)
E7 1 1/4-11 BSP 20.0 (0.79)
N4 7/16-14 UNC 31.8 58.72 30.17 20.6
E8 1 1/2-11 BSP 22.0 (0.87)
(1.25) (2.31) (1.19) (0.81)
N5 1/2-13 UNC 38.1 69.82 35.71 20.6
(1.5) (2.75) (1.4) (0.81)
N6 1/2-13 UNC 50.8 77.77 42.88 20.6
(2.0) (3.06) (1.69) (0.81)
P1 M8 12.7 38.10 17.48 15.0 Inch equivalents for millimeter dimensions are shown in (**).
(0.5) (1.5) (0.69) (0.59)
P2 M10 19.0 47.63 22.23 20.6
(0.75) (1.88) (0.88) (0.81)
P3 M10 25.4 52.37 26.19 21.4
(1.0) (2.06) (1.03) (0.84)
P4 M10 31.8 58.72 30.17 20.6
(1.25) (2.31) (1.19) (0.81)
P5 M12 38.1 69.82 35.71 20.6
(1.5) (2.75) (1.41) (0.81)
P6 M12 50.8 77.77 42.88 20.6
(2) (3.06) (1.69) (0.81)
PGP/PGM 620 Drive Shaft Inch equivalents for millimeter dimensions are shown in (**).
Code B1 Code C1
16.5 22.7
(0.65) (0.9)
(0.5)
Ø 25.4
Ø 13.5
(0.6)
Ø 25.4
Ø 15.0
(1.0)
32 38.2
(1.26) (1.5)
Code D1 Code E1
(0.85)
Ø 21.5
Ø 25.4
(1.0)
(0.72)
Ø 25.4
Ø 18.3
(1.0)
46
(1.8)
41.2
(1.62)
Code M3 Code M4
(1.06)
Ø 28.2 -0.2
Ø 27
(1.06)
Ø 25 -0.05
Ø 25.4
(1.0)
Ø 27
Ø 25.4
(1.0)
28.2 -0.2
Ø 25.4 -0.05
(1.11)
(0.98)
19
(0.05)
M8x1.25
M8x1.25
19
(1.11)
(0.75)
(1.0)
(0.75)
64.0
38.6
(2.5)
(1.5)
Circlip of 1.6
Circlip of 1.6
(0.06) 72
46
(2.8)
(1.8)
PGP/PGM 620 Drive Shaft Inch equivalents for millimeter dimensions are shown in (**).
Code M6 Code T1
(0.06)
(0.12)
1.5
Ø 25.4
(1.0)
M14x1.5
Ø 25.4
(1.0)
24.5 -0.2
Ø 22.23 -0.025
(0.96)
11.2
Ø 21.59
(0.85)
45.6 (0.44)
(1.8) Taper 1:8
47
(1.85)
53.8
(2.12)
Code T2
(1.06)
Ø 27
M16x1.5
(0.98)
Ø 25
11
(0.4)
Taper 1:5
51
(2.0)
Valve Options
VALVE TYPE PGP
620
Pressure Relief Valve X
Load Sensing Pressure Relief Valve X
Solenoid Unloading Pressure Relief Valve X
Pressure Unloading Relief Valve (Port Mounted) X
Solenoid Unloading Relief Valve (Port Mounted) X
Priority Flow Divider X
Priority Flow Divider (Port Mounted) X
Load Sensing Priority Valve X
Load Sensing Priority Valve (Port Mounted) X
Two - Stage Pump X
Single Accumulator Charge Valve X
Dual Accumulator Charge Valve X
Steering and Accumulator Charge Valve (STAC) X
Composite Priority and Accumulator Charge Valve X
P1
P1 P1
S T S T
P1
EF P1
EF
S S
T S T S
T S
Simplified Symbol
T S
P EF P EF
S S
Variations: Rear Mounted Versions: Press. Range: Priority Port Min. setting 35 bar
For PGP620 Priority Port Max. setting 210 bar
Without priority relief; With full flow Extended Flow Max. equal to max.
priority relief (not shown) rating of pump
With pilot priority relief valve Max. Flow: Valve for Port Mounted Version
Port Mounted Version: Priority Flow Max. 32 l/min
For PGP 620 Extended Flow Max. 70 l/min
Without priority relief Max. input flow 70 l/min
Valve for PGP 620 - Rear Mounted Version
Priority Flow Max. 45 l/min
PGP 620 + Valve Extended Flow Max. 100 l/min
Max. input flow 100 l/min
Comments:
The Priority Flow Divider provides a constant and specified flow for power steering or other
priority functions. The balance of the flow produced by the pump is available from the EF port
for additional functions such as open center directional control valves, fan drives, etc.
S S
With Priority Relief Valve and for Dynamic LS Signal Without Priority Relief Valve and for Dynamic LS Signal
Variations: Rear Mounted Versions: Press. Range: Priority Port Min. setting 35 bar
For PGP620 Priority Port Max. setting 210 ba
Without relief, static LS signal; Extended Flow Max. equal
With pilot relief, dynamic LS signal to max. rating of pump
Without relief, dynamic LS signal; Max. Flow: Valve for Port Mounted Version
With pilot relief, dynamic LS signal Priority Flow Max. 32 l/min
Port Mounted Version: Extended Flow Max. 70 l/min
For PGP620 Max. input flow 70 l/min
Without relief, static LS signal; Valve for PGP620
Without relief, dynamic LS signal Priority Flow Max. 45 l/min
Extended Flow Max. 100 l/min
Max. input flow 100 l/min
Comments:
The Load Sensing Priority Valve provides priority flow on demand, typically for LS power steering. The balance of the flow
produced by the pump is available from the EF port for additional functions such as open center directional control valves, fan
drives, etc. When the power steering is idle, full pump flow is available for these functions. The selection of pilot relief and static
or dynamic signal is dependent on the characteristics of the selected steering unit.
P P
S R S
With External Tank Port (recommended) With Internal Vent to Pump Inlet
Comments:
The Parker Two-Stage or High-Low pump is a tandem with equal or dissimilar displacements and a two position / two way valve in the
rear cover to allow unloading of the rear pump. This pump is applied when the prime mover (engine or electric motor) has limited power.
When high pressure is required, the rear section is unloaded to the pump inlet or the tank. When high flow is required at low or medium
pressure, the flow of both sections is combined at the outlet port P. In both cases, the displacements and pressures are selected to be
within the power limits of the prime mover.
Note: When the internal vent to the inlet is selected, caution is suggested to prevent operating in the unloading condition for extended
periods. The heat generated in doing so may lower the fluid viscosity below minimums required for the pump possibly damaging the pump.
Comments:
The Single Accumulator Charge Valve (SACV) provides priority flow to charge an accumulator for vehicle brakes or any
application requiring stored hydraulic energy. The SACV has an integral differential pilot relief valve to provide a wide variety
of cut-in/cut-out pressure ratios. Typical ratios are 80%, 70%, 60% and 50%. Custom ratios are available for OEM applications.
A variety of port locations and sizes are available. The balance of the pump flow at the EF port is available for an open circuit
directional control valve, fan drive or other ancillary functions.
Comments:
The Dual Accumulator Charge Valve provides priority flow to charge two accumulators for dual circuit vehicle brakes or any
application requiring stored hydraulic energy. The Dual Accumulator Charge Valve has an integral differential pilot relief valve
to provide a wide variety of cut-in/cut-out pressure ratios. Typical ratios are 80%, 70%, 60% and 50%. Custom ratios are
available for OEM applications. An inverse shuttle spool isolates the two circuits so that pressure and oil volume is maintained
in one circuit should the other experience a break in the hydraulic line. A variety of port locations and sizes is available.
Comments:
The combined LS Priority Valve and Accumulator Charge Valve provides equal priority flow to load sense power steering and
to charge one or more accumulators for hydraulic vehicle brakes. Excess pump flow is available from the EF port for the
implement hydraulics, fan drives or other services. The accumulator charge function has an differential pilot relief valve to
provide a wide variety of cut-in/cut-out pressure ratios. Typical ratios are 80%, 70%, 60% and 50%. Custom ratios are available
for OEM applications.Steering relief pressure (at P port) must be equal to or greater than maximum charge cut-out pressure.
Valve is available with inverse shuttle for dual circuit braking systems (above schematic) or without inverse shuttle for single
braking systems.
Comments:
The Composite Load Sense Priority and Accumulator Charge Valve provides first priority flow to charge one or two accumulators
for vehicle brakes and second priority to power steering. The balance of the pump flow at the EF port is available for an open
circuit directional control valve. The accumulator charge valve has an integral differential pilot relief valve to provide a wide
variety of cut-in/cut-out pressure ratios. Typical ratios are 80%, 70%, 60% and 50%. Custom ratios are available for OEM
applications. The combination is possible with Single and Dual Accumulator Charge Valves or Priority Flow Dividers. The
composite Valve is also available for remote mounting.
Motors
Valve type PGM
620
Single Pressure Relief Valve X
Single Pressure Relief Valve with Anti-Cavitation X
Cross Port Pressure Relief Valve X
Cross Port Pressure Relief Valve with Anti-Cavitation X
Solenoid Unloading Pressure Relief Valve for Motors X
Check Valve and Restrictor X
Comments:
Integral relief to protect motor. Motors fitted with this relief valve may be applied in series with the relief valve providing a limit
to the pressure differential, and hence, the output torque. The check valve allows the motor and driven load to “spool down” when
the fluid supply is shut off or reduced due to engine speed fluctuations. In series operation, the check valve permits the motor
to come to a controlled stop should the outlet flow be suddenly blocked. This check valve reduces the risk of damaging the motor
or blowing a hydraulic line. Motors fitted with this valve are available with side or rear facing ports.
Comments:
Motors fitted with this relief valve may be applied in series or in a hydrostatic transmission with the relief valve providing a limit
to the pressure differential, and hence, the output torque. The check valves allow flow to return to the inlet of the motor to prevent
cavitation. Available with side, rear, or combination of side and rear ports.
Comments:
This valve is similar to the solenoid unloading relief valve used on PGM 620. A small solenoid operated cartridge valve vents the
internal pilot to the motor outlet to unload the main spool. The outlet port is connected to tank via filter and heat exchanger (if installed).
The motor control can be set to provide low speed operation rather than coming to a full stop. This allows a quiet start for the fan as
it will start from approximately 100 rpm. The solenoid in the valve can be supplied for normally open or normally closed operation.
The anti-cavitation check valve allows motor spool-down, when the engine is shut down with the fan running.
Comments:
The Check Valve and Restrictor is used to control pressure spikes between motors in series circuit. The check valve allows the
motor and driven load to “spool down” when the fluid supply is shut off, or reduced due to engine speed fluctuations. In series
operation, the check valve permits the motor to come to a controlled stop should the outlet flow be suddenly blocked. This check
valve reduces the risk of damaging the motor or blowing a hydraulic line. The restrictor valve permits operation in reverse with
reduced efficiency for cleaning debris or backlapping of the cutters.