What is the difference between pneumatic and electric automatic control valves?
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What is the difference between pneumatic and electric automatic control valves? What are the requirements for use?
The difference lies in the power that drives the control valve to move: one is electricity, and the other is air.
Electric valves use electromagnetic force to directly open and close the valve. Pneumatic valves also contain a small electromagnetic valve; air is used for inflowing and outflowing, and the pressure of instrument air drives the main valve to open and close. Pneumatic valves are generally used in practice, as they do not require a strong electromagnetic driving force. Instrument air is readily available, and such valves offer stable and efficient control
Electric valves are driven by electric motors.
Is the adjustment precision the same when in use?
The power sources are different; one is electricity and the other is wind.
The main difference lies in the driving force: one is electric, while the other is driven by instrument air. Electric drives cannot be used in explosion-proof areas. Electric ones are cheaper.
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Explosion-proof electric valves have long been widely used in explosive hazardous environments, and their price is higher than that of pneumatic valves.
Control valves: those that are pneumatic are driven by compressed air, while those that are electric are driven by motors. The valve bodies are the same; it’s only the actuator that differs