The use of electric 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 electric ball valve should also be used on the pipeline equipment, so that the use effect will be better. After welding of metal pipes, the constant temperature time of electric ball valve heat treatment shall be 1h for every 25mm wall thickness, and shall not be less than 15min. During the constant temperature period, the maximum and minimum temperature difference shall be less than 65.
When the temperature of the metal pipe rises above 400, the heating rate of the electric ball valve shall not be greater than (205 × 25/ δ）/ h. And shall not be greater than 330/h. After we know the heating rate of the electric ball valve, we will learn about the installation of the electric ball valve in the project construction. First of all, the surface quality of the pipe used to connect with the electric 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 electric ball valve, one end of the electric 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 the electric ball valve is very simple. You can install it according to the instructions, and generally there will be no mistakes. Next, let's talk about the packing measures that should be taken to solve the large temperature rate change of electric ball valve in engineering application. The electric 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 electric ball valve, it is important to see the packing of electric ball valve, but these packing have many disadvantages. For example, the packing friction of the electric ball valve is relatively large. When filling, we should reduce the operating speed of the electric ball valve to reduce the friction. The packing of electric ball valve is a very important step and a troublesome solution. When filling the electric ball valve in the project, we should first consider the method of reducing friction.