The country has designated relevant installation and testing standards for the use of pneumatic ball valves to effectively supervise the production and processing of manufacturers, prevent some enterprises from using substandard products, which leads to the problem of safety in operation and use, and also prevent some manufacturers from replacing equipment. The use of inferior pneumatic ball valves has a great impact on the output quality of China's industrial products. At the same time, when installing and designing the internal pipes, attention should also be paid to the details to prevent secondary damage to the equipment in use.

Classify according to main parameters (I) Classify vacuum valves according to pressure. Valves whose working pressure is lower than standard atmospheric pressure. Low pressure valves with nominal pressure PN less than 1.6MPa. Medium pressure valve is a valve with a nominal pressure of PN 2.5~6.4 MPa. High pressure valve with nominal pressure of PN10.0~80.0MPa. Ultra high pressure valves with nominal pressure PN greater than 100MPa.