Electric valves usually consist of electric actuators and valves. The electric valve uses electric energy as power to drive the valve through an electric actuator to realize the opening and closing action of the valve. So as to achieve the purpose of switching the pipeline medium. The electric valve has a larger operating force than ordinary valves. The switching speed of the electric valve can be adjusted. The structure is simple and easy to maintain. It can be used to control air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, etc. The flow of various types of fluids.
Pneumatic valves are valves driven by compressed air. The compressed air is used to push the multiple sets of combined pneumatic pistons in the actuator to move, and the force is transmitted to the crossbeam and the characteristics of the inner curve track, which drives the hollow spindle to rotate. The compressed air disk is sent to each cylinder, and the air inlet and outlet positions are changed to change the spindle rotation. Direction, according to the requirements of the load (valve) rotation torque, the number of cylinder combinations can be adjusted to drive the load (valve) to work. Pneumatic valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media
The advantages of electric and pneumatic valves:
1. Pneumatic valve has good effect on gas medium and small pipe diameter liquid, low cost and convenient maintenance. Disadvantages: Affected by air pressure fluctuations, it is easy to be affected by water in air pressure in the northern winter, causing the transmission part to freeze and not move. Generally, pneumatic is faster than electric, and electric ones are dual-purpose flashlights. The price of pneumatic is relatively high.
2 The electric valve has a good effect on liquid medium and large pipe diameter gas, and is not affected by the weather. Not affected by air pressure. Disadvantages: high cost, not good in humid environment.
3. Slow action of electric valves. There are not many brands of electric valves that can achieve explosion-proof. Pneumatic valves move quickly, and explosion-proof is relatively cheaper than electric ones.
4. Electric valves are used in some places with large pipe diameters, because it is difficult to do pneumatically, but the stability of electric valves is not as good as that of pneumatic switching. The actuator will have a tooth jam for a long time. Pneumatic valves have high switching speed and high precision but need to be stable. Gas source.
Post time: Oct-20-2021