CRP-3/M is an analog positioner available in pneumatic and electro-pneumatic versions. The positioner has a heavy duty design making it suitable for use in very harsh conditions. It is used as the control part of the pneumatic valve set in oil and gas, refining, chemical, power, metal production and other fields with automated systems. The pneumatic versions accepts a 3-15 psi (0.2-1 bar) signal and the electro-pneumatic version a 4-20 mA signal.

The positioner is based on the balanced-forces principle with air distribution to the actuator chambers carried out by an internal spool. This positioner is designed for use on linear (minimum stroke 8mm) or rotary actuators using different feedback systems (e.g. lever or motion converter).

CRP-3/M is a double acting positioner but it can be used as single acting. The positioner is equipped with a different linear CAM (angle up to 270°) for use on actuators with different stroke lengths. The CAM operating angles and range adjustments are printed on the positioner. Special CAM profiles are available on request.


  • Available with a full stainless steel spool valve
  • Available with lever or with bare shaft, standard or Namur
  • Compact design
  • Heavy duty design
  • High reliability
  • Special characterisation/range
  • Split range signal
  • Suitable for:
    Standard, offshore, sandstorm, copper free ambient condition
    Single and double acting actuators
    Low and high ambient temperature

Technical data

Input Signal

3-15 psi

4-20 mA

Standard operating temperature

-20°C to 70°C

(lower or higher temperature on request)

CV max low flow

ND 1/4” Inlet = 0.12

ND 1/4” Outlet = 0.12

Air consumption

0.4 Nm3/h (0.25 SCFM) at 400kPa (60 psi)

+0.09 Nm3/h (0.06 SCFM) for version with I/P

Feeding connection

 ND 1/4”

Electrical connection

 ND 1/2” NPTF

Supply pressure

2.5÷7 bar


0.5% of full stroke


1% of the stroke with linear cam


0.15% of signal range

Accessories available

Customised cam

Intrinsically safe electro-pneumatic version for ATEX execution

Pressure gauges

VDI/VDE 3845 EN 15714-3 connections (NAMUR)

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