Electric Actuator Valve Types

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.

Electric actuator valve types. Selection of the best actuator type for any application is dependent on many factors including. 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. The motor operates in both directions and drives the valve stem by means of gear couplings. Linear electric valve actuators are well suited for operating in tight tolerances.

Figure 2 typical electric motor valve actuator. More information on rotary and linear motion valves can be found on engineering360 s valve types page. Electric motors can be used to open close and position a valve manually automatically or semi automatically. 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. Position switches are utilized to indicate the open and closed position of the valve. Pneumatic actuators provide for automatic or semi automatic valve operation. They are rotary and linear.