Advantages, defects and main characteristics of pneumatic ball valve
Advantages and disadvantages of pneumatic ball valve:
1. It can be made into products of various shapes and different 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. No matter in tension, compression, shear and changing the stress conditions, the deformation is relatively large.
Compared with metal ball valve and pneumatic ball valve, the main defects of pneumatic ball valve are:
1. Its natural frequency is difficult to reach below 5Hz;
2. Its ability to resist environmental pollution and temperature change is weak, and its service life is short.
Characteristics of pneumatic ball valve:
The reason why valve gasket is widely used is that it has durable high elasticity, good vibration isolation, shock isolation and sound insulation performance; The appearance and pressing are convenient, and the shape and size can be freely selected to meet the requirements of stiffness and strength; It has damping performance and can absorb mechanical energy, especially the absorption of high-frequency vibration energy; Because the data can be firmly bonded to the metal surface, it is not only easy to manufacture the device, but also can reduce the stiffness by applying multi-layer superposition, change its frequency range, and the price is low.
Of course, like the pneumatic ball valve, the valve gasket also has its weaknesses, such as being vulnerable to temperature, oil quality, 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 corrosion can exceed 10 years.
The performance of the valve gasket is not only related to the shape and formula of the gasket, but also related to its hardness. It has high hardness, high 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 ℃. Be careful when selecting them.