Electric Actuator Valve Types

They are rotary and linear.

Electric actuator valve types.

Electric motors can be used to open close and position a valve manually automatically or semi automatically. Position switches are utilized to indicate the open and closed position of the valve. There are two main types of actuators one for each of the two main types of valves that require them. More information on rotary and linear motion valves can be found on engineering360 s valve types page.

To protect the valve the torque sensing mechanism of the actuator turns off the electric motor when a safe torque level is exceeded. Typically a declutching mechanism and hand wheel are included so that the valve can be operated manually should a power failure occur. Figure 2 typical electric motor valve actuator. Linear electric valve actuators are used with gate globe diaphragm pinch and angle valves that feature a sliding stem that opens or closes the valve.

Linear electric valve actuators are well suited for operating in tight tolerances. They work by translating an instrument air signal into valve stem motion by air pressure acting on a diaphragm or piston connected to the stem. The motor operates in both directions and drives the valve stem by means of gear couplings. Selection of the best actuator type for any application is dependent on many factors including.