Pneumatic Piston Actuator

Our range of piston actuators are powerful, double-acting actuators that provide accurate control or on-off operation for control valves in our control valve range. The pneumatic piston actuator is a more suitable, cost-efficient option for higher pressure control valves such as the KT series. and compact alternatives to diaphragm actuators, especially when a balanced plug is not appropriate. Their reliability and accuracy makes them an effective choice for valve control.

  • Price Term: FOB/CIF/EXW/DAP
  • Package: Exported Wooden case or according to customer request
  • Delivery Time:  7 to 10 working days
  • Transports: By sea, by air, by high express
  • Shipment Port: Shanghai Port
  • Origin of Place: Jiangsu
  • Warranty: 12 Months

The company’s series of pneumatic piston actuators produced are pneumatic piston type linear-stroke actuators with spring return and adjustable zero proportion. Our pneumatic piston actuator is characterized by large output force, simple structure, reliability, light and small, fast action (up to 1.2-4.5s), and good earthquake resistance.  It can be assembled with a straight single-seat, angle type, sleeve, and other straight stroke regulating valves. It can be equipped with a positioner to become a pneumatic piston regulating valve. The allowable differential pressure can be obtained by selecting different spring ranges.

  1. SA type is a spring return piston actuator matched with the cut-off valve. It has the characteristics of quick and reliable action, light, and small volume.
  2. SN type is a two-way spring free-piston actuator, which can be combined with high-pressure differential, large caliber, high switch speed requirements, and high-temperature cut-off valve.
  3. SA and SN type actuators both can be equipped with top-mounted or side-mounted manual mechanisms.

Structure Pneumatic piston actuator

Structure Pneumatic piston actuator

Technical Parameters

Piston Actuator

Note: thrust calculation was to reverse the initial spring force shall prevail; spring range according to the 350-500KPa, valve closed valves with a relatively small range of spring.

Comparison Table of Rated Pressure and Saturated Steam Temperature

Temperature Pneumatic piston actuator


Dimesion Piston Actuator

Note: 1. The dimensions In the table are standard data without accessories. The dimensions of accessories are calculated according to the actual configuration. 2. Due to the technical innovation and improvement of the product, the size may change. Please contact the technical department of the Company for the latest information.


Part name  Material
Cylinder block Q235、A3
Piston LY12
Compression spring 60Si2MnA
 Push-rod 2Cr13
Sealing ring TPU、 EPDM
 Brackek ZG230-450

Note: Conventional material for carbon steel material, can be customized according to the user site conditions

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