SA/CL is an analog positioner available in a pneumatic and electro-pneumatic version. 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 UP-2 pneumatic version accepts a 3-15 psi (0.2-1 bar) signal and the electro-pneumatic version a 4-20 mA signal.

When using the electro-pneumatic version an I/P converter is installed on the pneumatic positioner which allows an electric signal to pilot the positioner. It is based on the balanced-forces principle; air distribution to actuator chambers is executed by an internal spool. The SA/CL is designed to be used for applications on linear actuators with a stroke length of over 70mm. This positioner is double acting but can also be used as single acting if required.


  • Action inversion without tubing inversion only for ND 1/4” version
  • Air purge version
  • Available full stainless steel spool valve for ND 1/4”
  • Heavy duty design
  • High reliability
  • Integrated bypass for ND 1/4” version
  • Sandstorm execution
  • Split range signal
  • Special characterisation/range
  • Full stainless steel spool valve for ND 1/2”
  • 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 = 0.34

ND 1/4” Outlet = 0.34

ND 1/2” Inlet = 0.637

ND 1/2” Outlet = 0.79

Air consumption

ND 1/4” 1.02 Nm3/h (0.6 SCFM) at 400 kPa

ND 1/2” 1.04 Nm3/h (0.8 SCFM) at 400 kPa

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


Feeding connection

ND 1/4”  Model SA/CL-2  

ND 1/2”  Model SA/CL-1

Electrical connection

 ND 1/2” NPTF


Supply pressure

2.5÷7 bar


0.5% of full stroke


1% of the full stroke


0.2% of signal range

Accessories available

Air-Lock ND 1/4” integrated

Change-over plate with by-pass valve

Customised cam

Intrinsically safe and explosion-proof electro-pneumatic version for ATEX execution

Pressure gauges

Special construction for corrosive environment

Contact us for more information