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COVNA: The first brand solenoid valve electric

The biggest difference between an electric shut-off valve and a pneumatic shut-off valve, as the name suggests, is that the drive form is different, one is controlled by the power source, and the other is controlled by the air source. From the perspective of running time, the action of pneumatic valves is relatively faster, while electric valves are slower. There is no big difference in other aspects. The question that should be considered is that according to the installation position, whether there is air source or power supply, the switching speed requirements, etc. , To choose the appropriate valve type.

普通型3
Electric ball valve

Pneumatic shut-off valve adapts to harsh working environment, has strong overload capacity, low failure rate, and is widely used in industry. Electric shut-off valves are usually used in occasions with strict sealing requirements. In addition to controlling gas, liquid and steam media, they are also suitable for controlling sewage and media containing fibrous impurities. They are widely used in petroleum, chemical, metallurgy, light industry, papermaking, power stations, Work areas such as refrigeration.

气动调节阀 不锈钢

Pneumatic film shut-off valve

The difference between electric shut-off valve and pneumatic shut-off valve:

1. From the driving form: the electric shut-off valve uses a power control switch, which is composed of a motor, a deceleration device, and a transmission device; the pneumatic shut-off valve is opened and closed with an air source, and is composed of a cylinder and related accessories.

2. From the perspective of reliability: when the electric shut-off valve loses power, the valve position remains unchanged, that is, electricity is needed for the switch, and the pneumatic shut-off valve can even be closed (or opened)!

3. From the perspective of safety performance: pneumatic shut-off valves can be used in explosive gas environments without relevant special treatment, while electric shut-off valves need to increase explosion-proof measures;

4. Convenience and performance: the electric shut-off valve can be used directly with electricity, while the pneumatic shut-off valve needs to be equipped with relevant air source equipment;

In terms of operating torque, the operating torque of pneumatic valve is larger than that of electric valve. The operating speed of pneumatic valve can be adjusted. The structure is simple and easy to maintain. Due to the cushioning characteristics of the gas itself, it is not easy to be damaged due to jamming during the operation, but it must There is a gas source, and its control system is more complicated than an electric valve. Pneumatic valves are sensitive, safe and reliable. Many occasions with high control requirements are specially equipped with compressed air stations for pneumatic instrument control components. The electric valve has strong applicability, is not affected by ambient temperature, has a large output torque range, is convenient to control, can achieve ultra-miniaturization, and is convenient for installation, maintenance and repair.