Valve Positioners

Siemens SIPART PS2 Positioner

The SIPART PS2 electropneumatic positioner is used to control the final control element of pneumatic linear or part-turn actuators. The electro-pneumatic positioner moves the actuator to a valve position corresponding to the set point. Additional function inputs can be used to block the valve or to set a safety position. A binary input is present as standard in the basic device for this purpose.


  • Simple installation and automatic commissioning (self-adjustment of zero and span)
  • Simple operation with
  • Local operation (manual operation) and configuration of the device using three buttons and a user-friendly two-line display
  • Parameterization via SIMATIC PDM
  • Very high-quality control thanks to an online adaptation procedure
  • Negligible air consumption in stationary operation
  • “Tight closing” function (ensures maximum positioning pressure on the valve seat)
  • “Fail in place” function: Current position is retained on failure of auxiliary electrical power and/or pneumatic failure (does not apply in conjunction with SIL). Example: For an actuator with a volume of 8 liters, the typical position stability of a SIPART PS2 with “Fail in Place” is 0.3 % per hour.
  • Numerous functions can be activated by simple configuring (e. characteristic curves and limits)
  • Extensive diagnostic functions for valve and actuator
  • Only one device version for linear and part-turn actuators
  • Few moving parts, hence insensitive to vibrations
  • External non contacting sensor as option for extreme ambient conditions
  • “Intelligent solenoid valve”: Partial Stroke Test and solenoid valve function in one device
  • Partial Stroke Test g. for safety valves
  • Full Stroke Test, Multi Step Response Test, Valve Performance Test for performance and maintenance evaluation of the valve
  • Can also be operated with purified natural gas, carbon diox- ide, nitrogen or noble gases
  • SIL (Safety Integrity Level) 2

YT-1000 Electro-Pneumatic Positioner

Electro-Pneumatic Positioner
The Electro-Pneumatic Positioner accurately controls valve stroke in response to an input signal of 4~20mA from the controller.


  • 2 million life cycle guaranteed
  • Response time is very fast and accurate
  • Simple part change can set 1/2 split range
  • Low air consumption
  • Simple Direct / Reverse Action change
  • Simple Zero & Span adjustment
  • Easy feedback connection
  • Internal options, such as position transmitter (PTM) and/or limit switch (L/S) is available (for non-explosion proof positioner – external options must be installed for explosion proof positioner)
  • A/M switch can be used to direct supply air to the actuator or to manually operate the positioner or valve.

YT-3300 Smart Positioner

Smart Positioner
YT-3300 series Smart Valve Positioner accurately controls valve stroke in response to an input signal of 4-20mA from the controller. Built-in micro-processor optimizes the positioner’s performance and provides unique functions such as Auto-Calibration, PID Control, Alarms, and HART Protocol Communications.


  • LCD display enables users to monitor the positioner status.
  • Positioner operates normally during sudden changes in supply pressure and / or high vibration environment.
  • Low air consumption level and low voltage use (8.5 V) yield to lower plant operating costs. The YT-3300 is compatible with most of controllers.
  • Variable orifice can be used to minimize the hunting occurrence and optimize operating conditions.
  • Valve system feedback is greatly improved by the accuracy and fast response of the YT-3300
  • Different valve characteristics can be adjusted – Linear, Quick Open, Equal Percentage, and Custom which user can make 16 points characterizations.
  • Tight Shut – Close and Shut-Open can be set.
  • PID parameters can be adjusted in the field without any additional communicator.
  • A/M switch can be used to direct supply air to the actuator or to manually operate the positioner or valve.
  • Split range 4-12mA or 12-20mA can be set.
  • Operating temperature is -40 ~ 85’C.
  • Manual Operation allows the user to operate the valve manually.