Rongzheng
2021-11-29 17:15:44

What are the differences between electric and pneumatic valves?

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  What is the difference between pneumatic valves and electric valves, what advantages and disadvantages do they have, and what occasions are they more suitable for, this article will introduce them to you.

  The electric gate valve is a kind of valve that does linear motion, which is matched with the Z-type multi-turn actuator, and there are switch type and intelligent type. This valve is simple to operate, and it is a more common opening and closing valve, which uses the upper and lower work of the ram to connect and shut off the fluid medium in the pipeline. It is widely used in electric power, metallurgy, petroleum, chemical industry, papermaking, sewage treatment and other departments.


Pneumatic gate valve is a double-layer cylinder with pneumatic actuator, and with buffer mechanism and manual and its protection mechanism, the valve due to the use of double-layer cylinder structure, compared with the single-cylinder pneumatic gate valve, the lifting force has been doubled. This fundamentally solves the disadvantage that some valves in the body of the single-cylinder pneumatic gate valve are wedged and cannot be opened.


Difference Between Electric Valve and Pneumatic Valve:


1. The action distance of the pneumatic valve is larger than that of the electric valve, the action speed of the pneumatic valve can be adjusted, the structure is simple, easy to maintain, and the cushioning characteristics of the gas itself are not easy to be damaged due to the stuck, but there must be a gas source, and its control system is also more complex than the electric valve. Pneumatic valves are sensitive, safe and reliable, and many factories with high control requirements set up compressed air stations for pneumatic instrument control components. The power source of the pneumatic valve actuator is the air source, and the air source comes from the air compressor, and the positioner is used to convert the electronic control signal into a pneumatic control signal, and the pneumatic actuator is driven to adjust the valve position.


2. The power source of the electric valve actuator is the power supply, if the circuit board or motor is faulty, it is easy to spark, so it is generally used in the occasion of low environmental requirements and no danger on the pneumatic actuator and the electric actuator regulation performance comparison, the pneumatic actuator responds faster, and can be more suitable for application in the adjustment working conditions, so the manufacturers of the production of control valves are also producing pneumatic actuators and matching them.


3. The adjustment response speed of the electric actuator is not fast enough, and the pneumatic actuator on the regulating valve is more than that of the electric actuator.


4. The essential difference between electric valves and pneumatic valves is that they use different driving devices, that is, actuators, while there is no difference between the regulating valve itself. With different actuators are mainly working conditions, such as chemical and other requirements Explosion-proof occasions, pneumatic valves are used more, because of high safety requirements, and the price is cheap, with intelligent positioners can be on the bus, and the control method is also simple.


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