It is very important for a purchaser to select a good ball valve damper, because only good can be effective, and only effective can get the expected standard.
In fact, the shock absorber of a ball valve is good or bad. In terms of the appearance, the paint, the electric welding joint, the shell, and most importantly the ball valve. The ball valve is the core damping element of the ball valve damper, and the material is the most important, but it is difficult for general customers to identify the advantages and disadvantages of the material, which can be understood through the external valve pad of the ball valve:
1. Whether the two ends of the ball valve are tightly polished, and if not, the stability of the shock absorber will be affected;
2. Whether the ball valve is evenly surrounded and has smooth surface;
3. Many small manufacturers' ball valves fail to meet the load requirements, and some large manufacturers also occasionally have this situation, so customers should pay attention when purchasing. Conditional customers should conduct pressure tests on ball valves;
4. The national standard requires that the compression amount of the shock absorber is 25mm, which can ensure that the natural vibration frequency of the shock absorber is low enough to ensure the damping effect;
5. In order to save costs and meet the load requirements, some manufacturers will make the ball valve very stiff, and the compression of the ball valve on the nominal load is very small.
According to the above standard requirements, most shock absorbers on the market are unqualified. Customers must pay attention to the compression amount of ball valves when purchasing. In fact, as the core element of the ball valve damper, the quality of the ball valve really has a great impact on the effect of vibration reduction, and the selection of the type is also strict. Asymmetric shock absorbers, even qualified products, cannot meet the expected standards.