Double piston effect valve seat (Figure 3), also known as double seal valve seat, is usually used in natural gas, city gas and other fields. Its feature is that no matter the pressure difference before and after fixing the pneumatic ball valve, each end of the valve or the valve cavity can independently bear the full pressure difference seal, and can ensure that both upstream and downstream are sealed at the same time to ensure continuous leak free. When the valve seat is working, the upstream and downstream valve seats play a sealing role at the same time, which can ensure that when the valve seat at either end is damaged, the valve seat at the other side can also play a sealing role independently. Therefore, if the double seal valve seat is adopted, the service life of the valve can be greatly extended. Generally, the damage probability of the upstream valve seat is much greater than that of the downstream valve seat. When the upstream valve seat of the double piston effect valve seat has a certain leakage, the downstream valve seat can completely block the leaked medium, so the sealing performance is more reliable.

How to stop the connection of stainless steel pneumatic butterfly valve
The rubber joint can be divided into three types of flange, fixed flange and thread according to the connection mode. According to the structure, it can be divided into five types: single ball, double ball, body with different diameters, curved ball and air pressure coil. The middle ball can be based on different working conditions and different working conditions, such as oil resistance, wear resistance, corrosion resistance, etc, Different rubber types are equipped. The corresponding flanges at both ends can also be equipped with steel flanges, forged flanges, stainless steel flanges and other materials according to the request of customers, or flanges of different sizes according to the standards of different countries
The rubber joint is also called rubber flexible joint, rubber flexible joint and rubber damper throat. It is not difficult to see the effect of vibration and noise reduction from the title. It can reduce the destructive force of vibration and noise on the pipeline, compensate for thermal shrinkage and contraction caused by temperature changes, and also compensate for a certain angle of lateral displacement
How to select and place a customer needs to confirm the structure of the selected rubber joint, which is a single ball, a double ball, or a joint with different diameters. In fact, the type, temperature, pressure, etc. of the medium are all certain. At the same time, the standard, pressure grade, and material of the flange are also required. Assume that the model is special
We can also provide detailed technical data, such as product length, shrinkage, compensation, deflection angle, etc. Since the rubber joint is made by high-pressure vulcanization of abrasive tools, its shape and size are basically fixed. If there is a special request, Hengshui Jintang Rubber and Plastic Products Co., Ltd. can manufacture according to the customer's request