Difference between electric valve and pneumatic valve

Electric gate valve is a kind of valve with linear motion. It is matched with Z-type multi rotation actuator, including switch type and intelligent type. This valve is easy to operate. It is a common opening and closing valve. It uses the up and down 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.
The pneumatic gate valve is a double-layer cylinder with pneumatic actuator, buffer mechanism, manual and protection mechanism. Due to the double-layer cylinder structure, the lifting force of the valve is doubled compared with the single cylinder pneumatic gate valve. This fundamentally solves the problem that some valve bodies of single cylinder pneumatic gate valves are wedged and cannot be opened.
Difference between electric valve and pneumatic valve:
1. The actuating force distance of the pneumatic valve is larger than that of the electric valve. The switching speed of the pneumatic valve can be adjusted. The structure is simple and easy to maintain. It is not easy to be damaged due to jamming due to the buffer characteristics of the gas itself during the action, but there must be a gas source, and its control system is also more complex than that of the electric valve. Pneumatic valves are sensitive, safe and reliable. Many factories with high control requirements set compressed air stations for pneumatic instrument control elements. The power source of the pneumatic valve actuator is the air source, which comes from the air compressor. The positioner is used to convert the electric control signal into pneumatic control signal to drive the pneumatic actuator to adjust the valve position.
2. The power source of the electric valve actuator is the power supply. If the circuit board or motor fails, sparks are easy to appear, so it is generally used in occasions with low environmental requirements and no danger. Compared with the regulation performance of the pneumatic actuator and the electric actuator, the pneumatic actuator has faster response speed and can be more suitable for application in the regulation condition. Therefore, the manufacturers producing the regulating valve produce the pneumatic actuator at the same time.
3. The adjustment response speed of the electric actuator is not fast enough, and the pneumatic actuator equipped on the control valve is more applied than the electric actuator.
4. The essential difference between electric valves and pneumatic valves lies in the use of different driving devices, that is, actuators, while there is no difference between the regulating valve itself. Cooperating with different actuators is mainly required by working conditions, such as chemical and other occasions requiring explosion-proof. Pneumatic valves are mostly used because of high safety requirements and low price. They can be connected to the bus with intelligent positioner, and the control mode is also simple.