What are the advantages and disadvantages of our pneumatic butterfly valve?
1. It can be made into products of various shapes and hardness, with good elasticity and sufficient strength;
2. It can make the natural frequency of the vibration isolation system lower and have higher damping;
3. The deformation is relatively large under tension, compression, shear and torsion.
Compared with metal ball valve, pneumatic butterfly valve, its main disadvantages are:
1. Its natural frequency is difficult to achieve below 5Hz;
2. Its resistance to environmental pollution and temperature change is weak, and its service life is short.
characteristic:
The reason why the vibration isolation pad is widely used is that it has durable high elasticity and good performance of vibration isolation, shock isolation and sound insulation; Easy modeling and pressing, and free choice of shape and size to meet the requirements of stiffness and strength; It has certain damping performance and can absorb mechanical energy, especially the absorption of high-frequency vibration energy; Because the material and the metal surface can be firmly bonded, it is not only easy to manufacture and install, but also can reduce the stiffness and change the frequency range with multi-layer superposition, which is cheap.
Of course, like the shock absorber, the vibration isolation pad also has its weaknesses, such as being vulnerable to temperature, oil, ozone, sunlight and chemical solvents, resulting in performance changes, aging and relaxation. Therefore, the service life is generally about 8 years, but the service life without above erosion can exceed 10 years.
The performance of the vibration isolation pad is not only related to the shape and formula of the pad, but also related to the hardness of the pad. It has high hardness, large stiffness, large bearing capacity, low hardness, low stiffness, and small bearing capacity. The hardness of some damping pads can be divided into 40 ℃, 60 ℃ and 90 ℃, so attention must be paid when selecting them.