Advantages and characteristics of pneumatic butterfly valve:
1. Variability selection of ball valve height, bearing capacity and ball valve stiffness:
When in use, the height, bearing capacity and stiffness of the ball valve can be selected independently from each other and in a wide range to obtain extremely soft ball valve characteristics.
Height of ball valve: height control valve can be used to properly control the height of pneumatic butterfly valve according to the use requirements, and maintain a certain height when the load on the spring changes.
Bearing capacity: for pneumatic butterfly valves of the same size, different bearing capacity can be obtained by changing the internal pressure, which is roughly proportional to the internal pressure. This enables the same pneumatic butterfly valve to adapt to multiple load requirements.
Ball valve stiffness: when designing the stiffness of the pneumatic butterfly valve, it can be selected by changing the internal pressure of the ball valve. The stiffness is roughly proportional to the internal pressure. Therefore, the stiffness can be selected very low as required. For a pneumatic butterfly valve with a given size, the stiffness is variable, and it changes with the change of load, so the natural vibration frequency is almost constant under any load, Therefore, it can make the supported system have almost constant performance.
2. Low natural vibration frequency
The pneumatic butterfly valve is connected to the additional air chamber, but the natural vibration frequency of the pneumatic butterfly valve device is reduced to 0.5~3Hz. Under any load, the pneumatic butterfly valve can maintain a low and nearly equal vibration frequency.
3. High frequency vibration isolation and good noise isolation effect
The pneumatic butterfly valve is composed of air and, with small internal friction, will not affect the ability to isolate high-frequency vibration due to the inherent vibration of the ball valve itself. In addition, the pneumatic butterfly valve has no metal to metal contact, so its noise isolation and anti noise effect are very good.
4. The damping effect of available air
An orifice is added between the pneumatic butterfly valve and the additional air chamber. When the spring-loaded load vibrates, the air flows through the orifice and has energy loss, thus playing the role of vibration attenuation.
5. Long service life
The fatigue resistance of pneumatic butterfly valve is many times better than that of metal ball valve. For the fatigue test of the ball valve in the suspension system of the vehicle's pneumatic butterfly valve, the steel plate ball valve was broken after only hundreds of thousands of vibrations, while the pneumatic butterfly valve was still intact after 5 million vibrations at the amplitude of 40 mm and the frequency of 2.7 Hz (160 times/min).
6. Body structure
The body structure of the pneumatic butterfly valve is soft, so it has a comprehensive vibration isolation effect in axial, transverse and rotary directions.