China manufacturer rotary quarter turn pneumatic actuators for valves
Pneumatic Actuator:

• Rack and pinion Actuator design
• Spring return or double acting
• Open and closed adjustment stops
• True NAMUR accessory mounting

Pneumatic actuator feature
1,structure is compact rack and pinion pneumatic actuators

2,low friction,long service life and the switching frequency is up to 1000000 times
3,used for angular stroke valves, ball valves, butterfly valves and plug valves
4,mounting flange in accordance to DIN/ISO5211,DIN3337,control valve with NAMUR standard
5,high quality aluminum alloy, the surface hard anodized + Teflon
6,through a variety of certificate: ATEX, CE, MD, CQC certificate
7,all products in the factory, are to undergo a rigorous testing, each actuator are marked on the production code, easy identification and tracking service
8,high-end products, excellent quality, complete certification system

 

Pneumatic actuator Structure

1. Indicator  

Position indicator with NAMUR is convenient for mounting accessories such as Limit Switch box positioner and so on.

2. Pinion          

the pinion is high-precision and integrative, made from nickelled-alloy steel, full conform to the latest standards of ISO5211, DIN3337, NAMUR. the dimensions can be customized and the stainless steel is available.

3. Actuator Body

According to the different requirements, the extruded aluminum alloy ASTM6005 body can treated with hard anodized, powder polyester painted(different colours are available, such as blue, orange, yellow, etc.), PTFE or Nickel plated.

4.End Caps

Die-casting aluminum powder polyester painted in different colours, PTFE or Nickel plated.

5. Pistons

the twin rack pistons are made from Die-casting aluminum treated with hard anodized or made from cast steel with galvanization. Symmetric mounting position, long cycle life and fast operation, reversing rotation by simply inverting the pistons.

Adjustment

the two independent external travel stop adjustment bolts can adjust 5at both open and close directions easily and precisely

7. High Performance Springs

Preloaded coating spring are made from the high quality material for resistant to corrosion and longer service life, which can be demounted safely and conveniently to satisfy different requirements of torque by changing quantity of springs.

8. Bearings & Guides

Made from low friction, long-life compound material, to avoid the direct contact between metals. the maintenance and replacement are easy and convenient.

9. O-rings

Rubber o-rings provide trouble-free operation at standard temperature ranges. for high and low temperature applications viton or silicone.