Rotary Stepping Actuators

Overview

The Master Flo Rotary Stepping Actuator is designed to operate our P2E through P10 choke and control valves. It mounts directly to the cover plate on bolted-bonnet valves, resulting in a compact sealed design and enabling fast and easy field conversion from manual to automated operation.

As a rotary actuator, incremental 36° steps position the valve in 1/10th of a turn rotations of the valve-stem nut. This delivers the precision and high torque essential for high pressure valves. Separate cylinders provide valve-open and valve-close operation, each with a spring to deliver linear thrust that is converted to rotary action through the actuator mechanism.

To enable the rotary stepping actuator to be used in a variety of applications for the entire range of our surface valves, three styles of operating cylinders are available: pneumatic, high-thrust pneumatic, and hydraulic.

Rotary Stepping Actuators

Control

The Master Flo Rotary Stepping Actuator is typically operated through solenoids in conjunction with position feedback supplied from a 4-20 mA position transmitter unit. Optional positioner control systems are also available. 
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