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Valve Positioning Systems


Positional control or proportional valve positioning systems are available using either a pneumatic impulse signal (e.g. 0.2 to 1 Barg) or an electrical signal (normally 4 to 20 mA). These systems are designed either to have customer defined pre-set positions or to have full control of the valve between the open and closed positions. Valve positioning systems can be used in conjunction with on/off production or ESD controls and can be utilised for a partial test system e.g. using digital controllers. PLC controllers can also be incorporated to provide complete automatic valve positioning control via input from pressure transmitters.


Precise positioning of quarter-turn and linear valves.

Operating Ranges

Electrical Supply (VAC)

  • 380/440V – 3 Phase – 50/60 Cycles
  • 110/240V – Single Phase 50/60 Cycles

Electrical Supply (VDC)

  • 24VDC 50W or 100W


  • Command signal: 4-20mA
  • Re-transmission Signal: 4-20mA
  • Protocol: 4-20mA HART or Foundation Fieldbus


  • Positional: Better than ±0.5%
  • Repeatability: Better than ±0.5%


  • Low: -60 to +60°C  (-76 to +140°F)
  • Standard: -20 to +60°C  (-4 to +140°F)

Key Features & Benefits

  • The same simplicity and low cost of installation as provided by electric actuators
  • Fail safe or fail last operation
  • The power, precision and compact size of high pressure hydraulic systems
  • Industry-leading  control options  and system diagnostics
  • Zero emissions
  • Environmentally responsible via low power, solar powered and biodegradable fluid options

Additional Resources

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