When selecting pneumatic butterfly valve, we should first understand its characteristics, and then select it through the environment. The characteristics of pneumatic butterfly valve are that its shape can be designed as required, its stiffness can be adjusted, it can provide greater damping ratio than ball valve, it can resist shear, tension, compression, and it is easier to install. Its disadvantages are high natural frequency, short service life, and limited service environment. Generally, the service environment temperature should be controlled between - 30-70 ℃. Some chemical corrosive environments should select pneumatic butterfly valves with appropriate materials for use.
The common ones suitable for the production of pneumatic butterfly valves are: natural rubber, neoprene rubber, butadiene rubber; The market is full of pneumatic butterfly valves made of recycled rubber, which are hard to handle without ball valve performance, nonlinear load compression ratio, rough surface, poor vibration reduction effect and easy to aging. Remember to choose carefully and avoid purchasing such pneumatic butterfly valves.
Application scope of pneumatic butterfly valve: First, the vibration source is the vibration isolation and noise control of high-frequency rotating mechanical equipment. For example: for fans, water pumps, generator sets, air conditioning hosts, etc., pneumatic butterfly valves should be used when the rotation frequency of mechanical equipment should be greater than 1000 revolutions; 2、 The impact frequency of stamping equipment should avoid the natural frequency of pneumatic butterfly valve. For example, punch, die-cutting machine, press, etc; 3、 Pneumatic butterfly valves are widely used in automobiles, aerospace and navigation due to their shock absorption function in all directions; 4、 Other mechanical equipment.
At the same time, due to the characteristics of the product itself, there are many occasions where the product industry is very inappropriate. First of all, it will become brittle at minus 30 degrees and lose its own elastic deformation. At this time, it will not have the effect of vibration reduction. Therefore, in a too cold environment, do not use class vibration reduction products to avoid the expected effect. It also cannot withstand high temperature. As long as it exceeds 75 degrees Celsius, its internal structure will change, and its elasticity will completely disappear. Of course, it will no longer have any damping function. If the temperature continues to rise, it may burn up. Therefore, if the shock absorber is used in a very high temperature environment, it should not be used, otherwise, it will not play the expected role in reducing vibration, and even may cause accidents.