Appearance difference: it is composed of actuator and valve body. The limit switch of electric valve is in the electric device. The limit switch of pneumatic valve, air filter and solenoid valve.
Time difference: the pneumatic valve should be opened and closed quickly. The DN50 pneumatic ball valve can be opened and closed in one second. The electric valve is relatively slow to open and close, and generally needs 15-30 seconds.
Cost problem: relatively speaking, the cost of electric valve is higher than that of pneumatic valve. If there is air source on site, it is recommended to use pneumatic valve (generally, the air source pressure is 4-6kg), and the applicability of pneumatic valve on the market is higher than that of electric valve.
Service life: the service life of the electric valve is relatively low, generally less than 10000 switches are used, and the service life of the pneumatic valve can reach millions of switches. (if the electric valve wants to achieve more than 100000 times, it can reach about 300000 times unless a brushless motor is used, but it can only be used as a gear of 50mm. If it exceeds 50nm, it can not be used. If it is less than 50nm, it can only be equipped with a ball valve of DN32 caliber, and if it is equipped with a butterfly valve, it can be equipped with a ball valve of DN100 caliber).
Waterproof: the waterproof property of the electric valve is not as good as that of the pneumatic valve. In fact, the waterproof property of the electric valve itself is not bad. However, some customers do not connect the wires properly, which will lead to water leakage. Many electric valves are used outdoors. In the southern plum rain season, too large temperature difference will produce condensed water. Too much condensed water will cause internal mold and short circuit, and the circuit board inside will be easily damaged by condensed water, Therefore, we recommend that customers who buy electric valves should be powered on 2-3 times a month when they are not in use. The air cylinder does not matter. The waterproof property of the pneumatic valve will be better.
Switching mode: the pneumatic valve is driven by the air source (the air source is from the air compressor). After the air source enters, the valve is closed. When the air is discharged, the valve rod is turned to open. The electric valve is a 90 ° rotary switch valve.