Actuator
A device that moves or controls a valve using an external power source - pneumatic (compressed air), electric (motor), or hydraulic (fluid pressure). Replaces manual operation for remote, automated, or fail-safe control.
What is Actuator?
A device that moves or controls a valve using an external power source - pneumatic (compressed air), electric (motor), or hydraulic (fluid pressure). Replaces manual operation for remote, automated, or fail-safe control.
Vajra Industrial Solutions is an engineering-driven industrial valve manufacturer and supplier. Concepts such as actuator inform how we select, manufacture, and document valves for industrial service.
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What is a Actuator?
A device that moves or controls a valve using an external power source - pneumatic (compressed air), electric (motor), or hydraulic (fluid pressure). Replaces manual operation for remote, automated, or fail-safe control.
How is a Actuator sized for a valve?
Actuator sizing requires the valve's breakaway torque (BTO), running torque (RTO), and end-to-close torque (ETO) at the maximum differential pressure and operating temperature. The actuator output torque at minimum supply pressure must exceed the valve BTO by a safety factor (typically 1.25x minimum). For pneumatic actuators, the supply pressure range, fail-safe direction (spring return FC or FO), and speed requirements must also be specified.
When is a Actuator required versus manual operation?
Automation is required when: (1) the valve is in a remote or hazardous location, (2) rapid opening/closing is needed for emergency shutdown (ESD), (3) the valve must respond to a control signal (4–20 mA, HART, or fieldbus), (4) the operating torque is too high for manual operation, or (5) the valve is part of a Safety Instrumented System (SIS) requiring SIL certification. Contact Vajra Industrial Solutions for fully automated valve packages including actuator, limit switch, solenoid, and positioner.
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