Pneumatic butterfly valve of central air conditioner
Damper spring pneumatic butterfly valve (also known as prestressed spring damper) has the double advantages of low frequency and large damping of steel spring damper, and eliminates the inherent resonance amplitude of steel spring. There are more than 30 specifications of this series of products, among which the natural frequency of various loads corresponding to a single load of 15kg-4800kg is 1.6Hz-4.9Hz, and the damping ratio is 0.065. This series of shock absorbers has a wide load range, which is convenient for users to choose, low natural frequency, good vibration isolation effect, compact structure, small overall dimensions, convenient replacement, reliable operation, long service life, and strong adaptability to the working environment. It has obvious effect on the isolation of active vibration isolation, passive vibration isolation, shock vibration and solid sound transmission. It is an ideal shock absorber to isolate vibration and reduce noise, manage vibration hazards and maintain the environment.
Damping spring shock absorber can be divided into three types according to different device modes:
1. There are anti-skid rubber pads on the upper and lower seats of the shock absorber. For power equipment with less interference, the ZT shock absorber can be placed directly under the base of the equipment, and the center of gravity can be adjusted arbitrarily without fixing.
2. Upper fixed type.
3. It can be fixed up and down to meet the needs of various devices.
Applicable equipment: water pump, fan, water chiller, floor fresh air fan, combined air conditioner, cabinet air conditioner, roof air conditioner, centrifugal fan.
Load range: 25-3400KG

3. Considering the structure, the valve core and valve seat with special structure can be designed to avoid the damage of cavitation. The basic principle is to make the high-speed fluid pass through the valve core and valve seat at every point higher than the saturated vapor pressure at this temperature, or make the liquid collide with each other, causing high-speed turbulence between flow paths, so that the kinetic energy of the liquid in the valve body parts becomes heat energy due to friction, thus reducing the formation rate of bubbles.
(1) The principle of stepwise pressure reduction is adopted to divide the total pressure difference of valve body components into several small pressure differences, and stepwise pressure reduction shall be carried out so that each level does not exceed the critical pressure difference.
(2) Use the principle of multi hole throttling of liquid flow to reduce cavitation. This type of valve body parts is characterized by many holes with special shapes on the sleeve wall or valve core of the valve body parts. When the liquid is ejected from each small hole, it collides with each other at the center of the sleeve. On the one hand, it consumes energy due to collision and plays a buffer role; On the other hand, because the bubble breaks at the center of the sleeve, direct damage to the valve core and sleeve is avoided.