Positioner

ALIS Valves offers Valve Positioners designed to provide accurate positioning and control of pneumatically actuated control valves in industrial process systems. A positioner receives a control signal from a process controller and adjusts the air supply to the actuator so that the valve reaches the required opening position. This helps improve positioning accuracy, control response and stability when regulating flow, pressure, temperature or liquid level. Depending on the application, positioners may use pneumatic or electro-pneumatic operation, with common control signal options such as 4–20 mA for compatible electro-pneumatic models. Available features may include position feedback, adjustable calibration, mounting accessories and compatibility with different pneumatic actuators and control valve designs.

Valve Positioners are commonly used in chemical processing, oil and gas facilities, power generation, water treatment, pharmaceutical manufacturing and other industries requiring precise automatic process control. They are typically installed on compatible pneumatic control valves to help maintain the desired process conditions in response to changing operating demands. Important selection factors include the actuator type, valve travel or rotation, input signal, air supply pressure, mounting arrangement, operating temperature and environmental protection rating. Buyers should also verify whether a linear or rotary positioner is required, along with compatibility with the actuator’s operating direction and feedback mechanism. Correct installation, calibration and adjustment help ensure that the valve position corresponds accurately to the controller’s signal. Selecting the appropriate valve positioner helps improve control accuracy, process stability and reliable operation of compatible automated valve systems.