Fisher 3025 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. Fisher 3025 diaphragm actuators provide small to medium thrust output for Fisher sliding-stem valves, including the easy-e™, HP, EH, and 461 valves. 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.

Fisher 3025 Features

● Maximum thrusts of up to 76.3 kN (17,155 lbf) can be produced, depending on construction.

● Depending on size, strokes of up to 200 mm (8 in) are available.

● Application Versatility—Yoke boss mountings, travel stops, and manual operators are available for nearly any control valve requiring longer valve plug travels.

● Positive Connections—Split block stem connection provides for a solid transfer of motion while allowing easy mounting, and it includes no linkages to create lost motion and inaccurate valve positioning.

● Reversible Construction—Actuator action can be easily changed on site without need of additional parts.

● Long Service Life—Rugged steel construction provides stability and corrosion protection.

Fisher 3025 Specifications

Actuation: Spring-return, Linear

Certifications: PED, CUTR, ATEX

Control Type: On/Off, Throttling, Positioning

Operating Temperature: Standard Temperature

Power Source: Pneumatic

Process Control: On/Off, Throttling, Positioning

Valve Type: Angle Valve, Globe Valve