The use of pneumatic ball valve on the pipeline has brought better use effect to customers. As the saying goes, good steel should be used on the blade, and good pneumatic ball valve should also be used on the pipeline equipment, so that the use effect will be better. After the metal pipe is welded, the constant temperature time of the pneumatic ball valve heat treatment shall be 1h for every 25mm wall thickness, and shall not be less than 15min. The maximum and minimum temperature difference during the constant temperature period shall be less than 65.
When the temperature of the metal pipe rises above 400, the heating rate of the pneumatic ball valve should not be greater than (205 × 25/ δ）/ h. And shall not be greater than 330/h. After we know the heating rate of the pneumatic ball valve, we will learn about the installation of the pneumatic ball valve in the project construction. First of all, the surface quality of the pipe used to connect with the pneumatic ball valve shall meet the requirements of 5.2.4. The allowable deviation of its outer diameter shall meet the requirements of GB/T8163GB/T9711.2GB/T14976 respectively. Secondly, when installing the pneumatic ball valve, one end of the pneumatic ball valve should be close to the pipe fixing support, and the other end should be set with a guide support near the other end (generally 4 times the pipe outer diameter). The installation method of pneumatic ball valve is very simple. You can install it according to the instructions, and there will be no mistakes generally. Next, let's talk about the packing measures that should be taken to solve the large temperature rate change of pneumatic ball valve in engineering application. Pneumatic ball valve is a protective measure taken when the temperature of the connecting expansion pipe or bellows changes greatly.
For example, for thermal expansion and contraction solids, although the length of the variation is not large, the object that prevents deformation has great power. For the pneumatic ball valve, it is important to see the packing of the pneumatic ball valve, but these packing have many shortcomings. For example, the packing friction of pneumatic ball valve is relatively large, so when filling, we should reduce the operating speed of pneumatic ball valve to reduce the friction. The packing of pneumatic ball valve is a very important step and a troublesome solution. When filling the pneumatic ball valve in the project, we should first consider the method of reducing friction.