Pneumatic Valve Actuator

Pneumatic Valve Actuator (Rack and Pinion)

Rack-and-pinion pneumatic valve actuator

The actuator the positioners are most often shipped on: a cast-aluminium rack-and-pinion unit with hard-anodised body option, ±5° travel adjustment at both 0° and 90°, and standard, low- and high-temperature seal builds.

Supply pressure 2–8 bar, dry or lubricated air, particle size under 30 µm
Standard -20 to +80 °C; low-temperature -40 to +80 °C; high-temperature -20 to +160 °C
Travel adjustment ±5° at 0° and 90°
Cast aluminium cylinder body, hard anodising available; alloy steel pinion and cam
NBR seals standard, Viton or silicone rubber optional; indoor or outdoor duty

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Typical duty: Ball and butterfly valve automation packages, supplied with or without the positioner fitted.

Specification

Pneumatic valve actuator — operating conditions and materials (source product page)
Operating media	Dry or lubricated air, or non-corrosive gas; maximum particle diameter under 30 µm
Air supply pressure	Minimum 2 bar, maximum 8 bar
Operating temperature	Standard -20 to +80 °C; low temperature -40 to +80 °C; high temperature -20 to +160 °C
Travel adjustment	±5° at 0° and at 90°
Application	Indoor or outdoor
Cylinder body	Cast aluminium; hard anodising and other anti-corrosive finishes optional
Pinion and cam	Alloy steel; nickel plating or stainless steel optional on the pinion
O-rings and seals	NBR standard; Viton or silicone rubber optional
Bearings and gaskets	Engineering plastic
Fasteners	Stainless steel adjusting bolts, nuts and washers

Technical background

Operating Conditions: 1. Operating Media Dry or lubricated air, or the non- corrosive gases,The maximum particle dia meter must less than 30 μm. 2. Air Supply Pressure The minimum supply pressure is 2 Bar. The maximum supply pressure is 8 Bar. 3. Operation Temperature Standard:-20℃~+80℃, Low-temperature Type:-40℃~+80℃, High-temperature Type:-20℃~+160℃ 4.

Travel Adjustment: Have adjustment range of ±5° for the rotation at 0° and 90° 5. Application: Either indoor or outdoor No Parts Name Qty Material Anti-corrosive Optional Material 1 Indicator Screw 1 Plastic 2 Indicator 1 Plastic 3 Spring Clip 1 Stainless Steel 4 Washer 1 Stainless Steel 5 Outer Gasket 1 Engineering Plastic 6 Cylinder Body 1 Cast Aluminum Hard Anodizing etc.

7 Inner Gasket 1 Engineering Plastic 8 cam 1 Alloy Steel 9 upper shaft bearing 1 Engineering Plastic 10 upper shaft o-ring 1 NBR Viton/Silicone Rubber 11 Pinion 1 Alloy Steel Nickel Plating Stainless Steel 12 Bearing 1 Engineering Plastic 13 O Ring() 2 NBR Viton/Silicone Rubber 14 Plug 2 NBR Viton/Silicone Rubber 15 Adjusting Screw O Ring 2 NBR Viton/Silicone Rubber 16 Adjusting Screw Nut 2 Stainless Steel 17 Adjusting Bolt 2 Stainless Steel 18 Piston 2 Cast Aluminum/Cast Steel Oxidation/Zinc Plating stainless steel 19 Piston Guide Plate 2 Engineering Plastic 20 Piston Bearing 2 Engineering Plastic 21 Piston O Ring 2 NBR Fluoro/silicon rubber 22 Spring 0~12 Stainless Steel Dipping Paint 23 End Cover O Ring 2 NBR Fluoro/silicon rubber 24 End Cover 2 Cast Aluminum Powder Coating etc.

25 End Cover Bolt 2 Stainless Steel 26 Limit Bolt 2 Stainless Steel 27 Limit Nut 2 Stainless Steel Pneumatic actuators are actuators that use air pressure to drive open and close or adjust valves. They are also called pneumatic actuators or pneumatic devices, but they are generally called pneumatic heads. Pneumatic actuators are sometimes equipped with certain auxiliary devices.