Pneumatic valve and electric valve difference

Pneumatic valve and electric valve are two kinds of valves that are widely used on the market at present, what is the difference between pneumatic valve and electric valve?

Appearance difference: are composed of actuator and valve body, electric valve limit switch in the electric assembly, pneumatic valve limited position switch, air source filter, solenoid valve.

Time difference: the pneumatic valve switch should be fast, the pneumatic ball valve of DN50 can be switched in one second, and the electric valve is relatively slow to switch, generally requiring 15-30 seconds to switch.

Cost problem: Relatively speaking, the cost of electric valve is higher than that of pneumatic valve, if there is an air source on site, it is recommended to use pneumatic valve (general air source pressure is 4-6kg), and the applicability of pneumatic valve on the market is higher than that of electric valve.

Longevity issues: Electric valve life is generally less than 10,000 times switch, pneumatic valve life can reach millions of times switch, (Electric valve wants to achieve more than 100,000 times unless the brushless motor is used, up to 300,000 times or so, but can only do gear 50mm, more than 50nm can not be used, 50nm below the relative can only be equipped with DN32 caliber ball valve, With butterfly valve can be equipped with DN100 caliber below).

Water resistance: The water resistance of the electric valve is not as good as the pneumatic valve, and the water resistance of the electric valve itself is not bad, but because some customers are not connected when wiring, it will lead to water leakage, and many electric valves are used outdoors, in the southern Meiyu season, the temperature difference is too large, condensed water will produce too much condensed water will cause internal mold short circuit, The circuit board inside is easy to be damaged by condensation water, so we recommend that customers who buy electric valves pass electricity 2-3 times a month when they are not in use. And the cylinder does not matter, the water resistance of the pneumatic valve will be better.

Switching mode: The pneumatic valve is driven by the air source (the air source comes from the air compressor), the valve is closed after the air source enters, and the valve stem is turned to open when the gas is discharged. The electric valve is a 90° rotating switch valve.