The pneumatic ball valve is installed between the upper and lower valve stems. When the ball is closed, the valve seat spring pushes the valve seat to compress the ball, and the force on the spherical area formed by the outer diameter of the valve seat sealing surface and the spherical sealing line seals the pneumatic ball valve. The reliability of sealing depends to a large extent on the ratio of pMP to Dm. If the ratio of the sealing surface and the contact surface area with the spherical surface is not large enough, the pneumatic ball valve will not be able to ensure reliable sealing, otherwise it will cause overload of the valve seat and seal ring, which will increase the opening and closing torque of the valve and accelerate the wear and tear.

What are the installation steps and precautions for welding pneumatic butterfly valve
There are many sales orders for pneumatic butterfly valves in the near future. Pneumatic butterfly valves are used as compensation elements, sealing elements, connecting elements, shock absorption elements and other important components in engineering technology, and are widely used in aerospace, petrochemical, mining electronics, machinery and shipbuilding, medical and health, textile electronics, power construction, metallurgy and other fields.
When the pneumatic butterfly valve is used as a highly flexible pipeline connecting metal equipment, it is mostly welded with other equipment. In the process of welding, we often use the five step welding method. Under the leadership of the small editor, we understand the detailed implementation of the five step welding method
1. Nozzle dimension. During welding, the length of the pipe shall be measured first, and then the pipe knife shall be used to cut the pipe.
2. Clean the pipeline. Because the pipe is metal, some waste slag will be oxidized in the pipe, and some waste slag will affect the welding effect. Therefore, before welding, we use emery cloth or paper to grind away the waste slag in the pipe.
3. Clean the fittings with a pipe brush. Cleaning the fittings ensures that the welding hose is bonded to the tin plating.
4. Grasp the welding time. Generally speaking, the length of the weld bead you need depends on the length of the solder.
5. Use flare heat pipe. The use of flare heat pipe is primarily to ensure that the weld of the pipe is heated evenly. Note that when using the torch, ensure that the flame is close enough to cover the diameter of the whole pipe.
The grasp of the welding process of the pneumatic butterfly valve will help the user to stop the welding of the pneumatic butterfly valve more safely. Although the welding of pneumatic butterfly valve is not easy, it is only necessary to carefully study the relevant common sense and be careful to stop the operation, and this operation will be better and better.