Emerson Fisher 3025 User Manual

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Fisherr 3025 Sizes P462, P460-200, and P900
Diaphragm Actuator
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. They can be specified as
either direct, e.g. air-to-close, or reverse acting e.g.
air-to-open(seefigure1).Theseactuatorsare
designed to provide dependable on-off or throttling
operation of automatic control valves.
ThesizeP462is available for travels up to 120 mm,
4.75 inches with air-to-open and air-to-close action.
ThesizeP460-200is available for travels up to 200
mm,8incheswithair-to-openandair-to-closeaction.
ThesizeP900is available for travels up to 120 mm,
4.75 inches with air-to-open and air-to-close action.
Features
Long Travel Capability–Suitable for valves with
valve plug travels of up to 200 mm (8 inches).
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.
W9088-2
Fisher 3025 Actuator Air-to-Open Action
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.
3025 Actuator
D102789X012
Product Bulletin
61.1:3025
March 2012