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Pneumatic rolling diaphragm actuator

Pneumatic rolling diaphragm actuator

Pneumatic diaphragm actuator Fisher 3025 Sizes P462, P460-200, and P900 Diaphragm Actuator

Description

Pneumatic diaphragm actuator

Fisher 3025 Sizes P462, P460-200, and P900 Diaphragm Actuator

Fisher 3025 diaphragm actuator Size P460-200, P462 and P900 spring opposed diaphragm actuators position the valve plug in the valve body in response to varying controller or valve positioner pneumatic output signals applied to the actuator diaphragm. They can be specified as either direct, e.g. air-to-close, or reverse acting e.g. air-to-open. These actuators are designed to provide dependable on-off or throttling operation of automatic control valves.
The size P462 is available for travels up to 120 mm, 4.75 inches with air-to-open and air-to-close action.
The size P460-200 is available for travels up to 200 mm, 8 inches with air-to-open and air-to-close action.
The size P900 is available for travels up to 120 mm, 4.75 inches with air-to-open and air-to-close action.

Features

1) Long Travel Capability–Suitable for valves with valve plug travels of up to 200mm(8 inches).
2) Application Versatility–Yoke boss mountings, travel stops, andmanual operators are available for nearly
any control valve requiring longer valve plug travels.
3) Positive Connections–Split block stem connection provides for a solid transfer of motion while allowing easymounting, and it includes no linkages to create lost motion and inaccurate valve positioning.
4) Reversible Construction–Actuator action can be easily changed on site without need of additional parts.
5) Long Service Life–Rugged steel construction provides stability and corrosion protection.

Specification

3025 pneumatic diaphragm Actuator
D102789X012

MaximumTravel

Sizes P462 and P900: 120mm(4.75 inches)

Size P460-200: 200mm(8 inches)

Output Indication

Stainless steel disc or pointer and graduated scale

Stroking Speed

Dependent on actuator size, travel, spring rate, initial spring compression, and supply pressure. If stroking speed is critical, consult your Emerson Process Management sales office. 

Operating Temperature Range

-30 to 80_C

Volumetric Displacement

See table 2

Signal Connection

1/2 NPT internal

Maximum Pressure

4 barg

Construction Materials

Diaphragm Casing: Steel

Diaphragm: Nitrile on nylon

Diaphragm Plate: Steel

Actuator Spring: Steel alloy

Actuator Stem: Steel alloy

Travel Indicator: Stainless steel

Yoke: Steel

If you have more interest, please send your valuable inquiry to this email: postmaster@wtindustrialeqpt.com

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