Electric Actuator Valve Types

Figure 2 typical electric motor valve actuator.

Electric actuator valve types.

Linear electric valve actuators are well suited for operating in tight tolerances. This power source can be electric pneumatic compressed air or hydraulic the flow of oil. Pneumatic actuators provide for automatic or semi automatic valve operation. To protect the valve the torque sensing mechanism of the actuator turns off the electric motor when a safe torque level is exceeded.

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. 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. They are rotary and linear.

There are two main types of actuators one for each of the two main types of valves that require them. Selection of the best actuator type for any application is dependent on many factors including. Position switches are utilized to indicate the open and closed position of the valve. More information on rotary and linear motion valves can be found on engineering360 s valve types page.