P3300 Series Instruction Manual
Pneumatic Valve Positioners
1
1 MOUNTING
1.1 Mounting
1. Mount the positioner mounting plate to the actuator yoke
using two 5/16” UNC screws.
2. Mount the positioner to the mounting plate using three M6
screws.
3. Check the positioner action. (See Fig. 1.3)
Direct Action: Increasing input signal gives increasing
output
Reverse Action: Increasing input signal gives
decreasing output.
Switching between Direct and Reverse Action
For direct action ensure that the switch position on the
nozzle is set at ‘D’ – See Fig. 1.1.
For reverse action ensure that the switch position on
the nozzle is set at R’ – See Fig. 1.1.
4. Check Actuator Action – see Fig 1.3
Direct Action Reverse Action
Direct actuators (air to close/air fail open )
Cam should be positioned with side ‘A’ facing outwards. Fig. 1.1 Nozzle Positions
– See Fig. 1.2.
Reverse actuators (air to open/air fail closed)
Cam should be positioned with side B’ facing outwards
– See Fig. 1.2.
5. Check Cam Characteristic
A/B1 = Linear
A/B2 = Delayed
A/B3 = Advanced
6. Before piping positioner output to the output to the actuator
apply a pressure value to the actuator to stroke the
actuator to 50% of its rated travel.
7. With the positioner feedback arm horizontal fix the drive
pin from the stem coupling to the feedback arm, so that the
position of the pin corresponds to the valve travel on the
feedback arm graduations. Lock the pin in position.
8. The positioner supply and output connections should now
be made. The supply pressure to the positioner should be
constant and not exceed 4.0 Bar G. If the supply exceeds
this limit a filter regulator must be used to avoid damage to
the actuator diaphragm.
Fig. 1.2 Cam Positions
Act Type Instrument Action Switch Position Cam Position
Direct D B
A
Reverse R A
Direct D A
B
Reverse R B
Fig. 1.3 Actuator Action Table 1.3 Actuator Action
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2 OPERATION
2.1 Principle of Operation – Fig 2.1
A variation of the 4 to 20 mA input signal causes a variation in
the force generated by the bellows unit. This changes the state
of equilibrium of the mechanism and produces a change in the
modulated signal from the flapper/nozzle/capillary system.
This change in signal is amplified in flow and pressure and acts
on the diaphragm of the actuator to produce a movement of
the valve stem proportional to the change in value of the mA
signal. The cam transmits the movement of the stem to a
feedback spring.
The stem continues to move until the force generated by the
bellows unit is balanced by the force generated by the
feedback spring. A new equilibrium condition is thus
established as a relation between position of the stem and the
input signal. Fig. 2.1 Schematic Diagram
2.2 Adjustments – Fig 2.2
1. Supply the positioner with dry, clean air up to a maximum 2.3 By-pass Switching
pressure of 60 PSI (4.0 bar). If the positioner is fitted with a by-pass switch, the switch
2. Zero Adjustment – Apply minimum signal pressure to the should be set to 'Positioner' for automatic operation.
signal connection and adjust the zero adjustment screw
until the output gauge reads a slight positive pressure If the switch is set to 'By-pass', the input signal is fed directly to
(approx. 1/2 PSI). the actuator.
3. Span Adjustment – Apply maximum signal pressure and
adjust the toothed sector plate until the actuator fully
strokes.
4. Re-check zero and adjust if necessary.
5. Re-check span and adjust if necessary.
Fig 2.2 Positioner - Covers Removed
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4
P3300 Series Pneumatic Valve Positioner
Specification DataFile
■■ Sin gle actin g, for ce-balan ce oper atin g
pr in ciple
■■ Ex cellen t dyn amic r espon se, sh or t
position in g time an d n eglegible
position in g er r or
■■ Field adjustable for valve str okes
betw een 1 4 mm an d 1 02 mm (1 /2 in
an d 4 in )
■■ Sin gle feedback cam w ith th r ee
stan dar d ch ar acter istics
■■ Con ven ien t, n o r an ge spr in g
ch an gin g r equir ed an d accur ate
mean s of split-r an gin g th e sign al an d/
or th e valve action .
■■ Compatible w ith all spr in g an d
diaph r agm-oper ated con tr ol valves
■■ Set an d for get r eliability
■■ Complies w ith r elevan t in ter n ation al
stan dar ds for test pr ocedur es an d
en vir on men tal pr otection again st
h ar sh plan t con dition s
4
Introduction
Model W-PP, the pneumatic valve positioner of the P3300
Series of field mounting instruments, ensures that the control
valve plug position is always directly proportional to the
pneumatic input signal, regardless of diaphragm actuator
hysteresis, packing-box friction or off-balance force on the
valve plug.
The valve responds to infinitely small changes in the controller
output signal when process lags require the use of wide
proportional band.
Problems usually associated with plant instability due either to
oversized valves or non-linear trim characteristics are
minimized by selecting one of the three feedback cam
alternative positions.
By-pass option allows positioner to be removed without
disturbing the control valve operation.
Turn-down ratio 5 to 1 by a single controller output signal split
ranging for sequential operation of two or more control valves
is standard.
Functional Specifications
Input Pressure Range Cam Characteristics
0.2 - 1 bar, 20 - 100 kPa, 3 - 15 lb/in*
0.4 - 2 bar, 40 - 100 kPa, 6 - 30 lb/in* Physical Specifications
Auxiliary Supply Pressure Construction
1.4 - 4 bar, 140 - 400 kPa, 20 - 60 lb/in*
Case and by-pass assembly
Start Point and Span Adjustments Standard: die-case aluminium alloy (low copper and
Separate, internal, continuous. magnesium).
Split-range Optional: AISI 316 ss.
Any value down to 20% of specified input range. Case cover
Stroke Length Standard: P.B.T. 20, glass fibre reinforced
polibutilentereftalathe.
Any value between 14 mm and 102 mm (1/2 in and 4 in)
Impact-resistant self-extinguishing polyester.
providing feedback lever rotation is 50Q.
Epoxy-resin painted - RAL 1001.
Output to Actuator Optional: AISI 316 ss.
Up to 95% of auxiliary supply pressure, direct or reverse Input bellows
acting.
Standard: brass.
Flow capacity (dynamic) Optional: AISI 316 ss.
Auxiliary supply Nl/h (scfm)
Supply Flapper/Nozzle
consumption (static) as input pressure
bar
Nl/h (scfm) AISI 303 ss.
Increases Decreases
1.4 max. 350 (0.21) up to 9000 (5.54) 9000 (5.54 ) Cam and Feedback lever:
4 max. 600 (0.36) up to 15600 (9.6) 9000 (5.54 )
AISI 304 ss.
Environmental Conditions
Barometric Pressure Vibration
Auxiliary Supply (bar) Temperature °C Relative Humidity %
(mbar abs) (according IEC 654-3)
min. 1.4 ± 1 %
Reference +15 to +35 45 to 75 860 to 1080 None
max. 4 ± 1 %
f1 = 1 to 10 Hz
min. 1.4 ± 5 %
Normal -25 to +85 (Amp. 1.5 mm)
max. 4 ± 5 %
f2 = 10 to 60 Hz
700 to 1080
(Amp. 0.15 mm)
min. 1.4 ± 15 % 0 too 100
Extreme f3 = 60 to 500 Hz
max. 4 ± 15 % condensing
(Acc. 19.6 m/s2)
-43 to +120
f = 1 to 150 Hz
Transport to
— 660 to 1080 (Vel. 2300 mm/s)
Storage
accidental
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…Physical Specifications Performance Specifications
Spring Unless otherwise stated performance specifications are given
at reference environmental condition, 0.2 to 1 bar or 0.4 to
AISI 302 ss.
2 bar input pressure standard ranges, with standard linear
Internal connections cam and direct acting positioner. All errors are quoted as
AISI 316 ss. percentage of the associated actuator stroke. Test procedures
are in accordance with relevant international standards.
Identification tag
AISI 316 ss permanently mounted - 20 characters max.
Accuracy
(legend to be specified).
±1% (includes combined effects of non-linearity,
Gauges hysteresis and repeatability).
Brass with plastic case or AISI 316 ss, as specified.
Terminal based linearity
Pneumatic connection ±05%
Supply, output and instrument: 1/4in. NPT female.
Repeatability
Natural gas exhaust Better than 0.3%
1/2 in NPT female.
Hysteresis
Net Weight Better than 0.5%.
2.5 Kg approx. without optional extras
Indication accuracy
Optional Extras ±2% f.s.d.
Positioner by-pass switch Environmental protection
Externally operated. IP 55 according to IEC 529.
Gauges
Operating Influences
Supply and Output: 0 to 4 bar/0 to 60 PSI, 0 to 4 kg.cm2
Signal: 0 to 2 bar/0 to 30 PSI 0 to 2kg.cm2 Ambient temperature over the range –25 to +55° C:
Natural gas auxiliary supply Better than ±0.3%/10K
For applications where instrument air is not available. Auxiliary supply:
Tapped 1/2 in. NPT.
±0.65%/0.1 bar.
Humidity and barometric pressure:
No influence.
Outline Dimensions
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Ordering Information
Order no. P3300 X X X X X X X X X X
Materials of Construction
Input Bellows and Case Case Cover
Relevant Parts
Brass Aluminium Polyester 1
AISI 316 SS Aluminium Polyester 3
AISI 316 SS AISI 316 SS AISI 316 SS 5
Auxiliary Supply
Instrument Air 1
Dry Natural Gas 5
Use Code 1
By-Pass Switch (*)
Without 1
With 2
Pressure Gauges
Input Output Supply Material of Gauges
No No No — 1
Yes Yes No Brass 2
Yes Yes Yes Brass 3
Yes Yes No AISI 316 SS 4
Yes Yes Yes AISI 316 SS 5
Cam Characteristic
Standard 1
Special (**) 9
Use Code 1
Use Code 1
Input Pressure Range (***)
3 to 5 lb/in2 1
20 to 100 kPA/0.2 to 1 bar 2
6 to 30 lb/in2 5
40 to 200 kPA/0.4 to 2 bar 6
Split Range (*) 9
Use Code 0
(*) Not recommended for split range or reverse action applications.
(**) Percent of input pressure / percent of valve stem travel relationship must be specified with the order.
(***) Input pressure range must be specified with order.
Note. Unless otherwise stated the positioner will be pre-set for direct action.
Issue 1
SS/3300
