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Quick Details

  • Type: Actuator
  • Place of Origin: Shanghai, China (Mainland)
  • Model Number: POASR20-4000
  • Brand Name: POV
  • Catalogue: Aluminum alloy single acting pneumatic actuator
  • Bore size: 50, 63, 75,88,100,125,145,160,190,210,240,300,340mm
  • Body material: Die-casting aluminum alloy
  • Working principle: Spring return, Single acting
  • Color: Siliver, black, red, orange, blue, etc
  • Indicator: NUMUR standard
  • Output shaft: Accod with NAMUR, ISO5211, DIN3337
  • Stroke adjustment: 0~90°
  • Piston: Dual piston rack-and-pinion design
  • Related product: POADA20 double acting mini pnuematic actuator

Packaging & Delivery

Packaging Details: Standard export packing:wooden and hardcard cartons,
Also can design and pack as your request.
Delivery Detail: Depends on custom's order quantity

 »  Aluminum alloy single acting pneumatic actuator


Summarize:           This series of product has experienced several decades of development and   technological improvement, It has many advantages such as operation reliability, operating life long, wide adjustable range, strong corrosion and specifications full rang with perfect functions and a strong marketing function. and widely used in petroleum, natural gas, chemical, electricity, papermaking, water treatment, heating, power plants, light industry and other industries.



General Specification:


1)   Linear torque output

2)   POASR: Spring return

3)   Wearing sliding bearing

4)   Dual piston rack-and-pinion design

5)   Use for long time and no maintenance



Operating temperature:

Standard product: -30°C to 100°C

FKM O-rings:15C° to 150°C

Silicon O-ring:-40° to 80°

Maximum working pressure: 8bar(116 PSIG)

Combined the spring seat load

Solenoid valve for the installation of NUMUR standard

According to NAMURVDI VDE 3845 standard installation each device

According to ISO 5211 and DIN 3337 standard connection

Position indicator can be also used to operate mechanical limit switches .


» Aluminum alloy single acting pneumatic actuator

Single acting working principle:




 When air pressure from the port (2) into two piston cylinder between midplane, make the two ends to the cylinder piston separation direction, forcing both ends of the spring compression, both ends air cavity air through the port (4) discharge, and at the same time, make the two live plug rack synchronous drive the output shaft (gear) counter-clockwise. In the air pressure after solenoid valve reversing, cylinder two piston in the spring under the stretch to intermediate direction, and the middle gas cavity air from port (2) exhaust out, at the same time make the two piston rack synchronous drive the output shaft (gear) clockwise. (if the piston relative inverse direction installation, spring reset output shaft that into reverse rotation)


Output torque for single acing pneumatic actuator:


Product processing and Inspecting:



 »Colorful pictures for your reference :


   Body material: Die-casting aluminum alloy,  

   Hard anodized, epoxy resin coating, can be costing as your requirement;




 » Don't hesitate, it is the time for you


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We promise the best product and serivefor you every time, all the time!


 Polovo valves (Shanghai) Co., Ltd  


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China (Mainland) | Manufacturer, Trading Company
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50 Transactions 110,000+
The supplier’s transactions conduted via Alibaba.com in the past 6 months.