How to judge whether the No.2 port of pneumatic ball valve is on or off?
The use of pneumatic ball valve in the pipeline has brought a better use effect to customers. As the saying goes, good steel should be used on the blade, and good pneumatic ball valve should be used on pipeline equipment. In this way, the use effect is better. After the metal pipe is welded, the constant temperature time of heat treatment for pneumatic ball valve shall be 1 h for every 25 mm wall thickness, and shall not be less than 15 min. during the constant temperature period, the maximum and minimum temperature difference shall be less than 65.
When the temperature of metal pipe rises to above 400, the heating rate of pneumatic ball valve shall not be greater than (205 × 25 / δ) / h and shall not be greater than 330 / h. After we understand the heating rate of pneumatic ball valve, we will learn about the installation of pneumatic ball valve in engineering construction. Firstly, the surface quality of the pipe used for connection with pneumatic ball valve shall meet the requirements of 5.2.4. And 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 bracket, and the other end (usually 4 times the pipe outer diameter) should be set with a guide bracket. The installation method of pneumatic ball valve is very simple. You can install it according to the manual, and there will be no error. Next, let's talk about the big change of temperature rate in the engineering application of pneumatic ball valve, and packing measures should be taken to solve the problem. The pneumatic ball valve is a kind of protective measure when the temperature of the expansion pipe or bellows changes greatly.
Such as thermal expansion and contraction of solid, although the length of the variation is not large, but to prevent deformation of the object has great force. For pneumatic ball valve, it is important to see the packing of pneumatic ball valve, but these packing has many disadvantages. 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 achieve the purpose of reducing friction. Packing of pneumatic ball valve is a very important step and a troublesome solution. When filling the pneumatic ball valve in engineering, we should first consider the method of reducing friction force.