Quick mud all pneumatic valve selection of points

（ ） Type in the application of pneumatic hydraulic control valve is a factory inspection, all kinds of logo is complete, the product technical information to meet the requirements.
( ） According to the functional requirements, selection of pneumatic valve type, and then according to the pipeline medium, temperature, building standards and the owner to ask and so on, to determine pneumatic valve pneumatic valve body and the material of sealing parts. The commonly used pneumatic valve materials have cast iron, copper, iron, copper, plastic, etc. Commonly used seal face and lining material have copper alloy, plastic, steel, cemented carbide, rubber, etc. Pneumatic valve body material should match the piping material.
( ） Pneumatic valve nominal pressure. 、. 、. 、. And. MPa at different levels, such as pipeline medium, its working pressure should be less than nominal pressure value of the pneumatic valve.
( ） Engineering of the hydraulic control pneumatic valve Settings should have enough space, so that the management, operation, installation and maintenance, and should accord with the requirement of pipe of pneumatic valve.
( ） Line with the flange connection, the flange connection hydraulic pneumatic control valve should be adopted. Line using the groove connection, should adopt the groove connection of hydraulic pneumatic control valve.
( ） Hydraulic pneumatic control valve should be set on the road at the pipe of unidirectional flow medium.
( ） Water control pneumatic valve main body in the direction of the arrow on the must be consistent with the piping system flow.
( ） Control hydraulic pneumatic valve, gas section should not have air blocking resistance phenomenon. In the aeration pipe network highest position such as deposit should be set up automatic exhaust pneumatic valve.
( ） When mounted horizontally, pneumatic valve, pneumatic valve, pneumatic valve cover pole should be facing up. Vertical installation, pneumatic valve, pneumatic valve stem should outwards.
( ） Pneumatic valve strength and leak test should be obtained before installation.
( ） The strength of the pneumatic valve and leak test shall meet the following requirements:
A, pneumatic valve strength test pressure for the nominal pressure. Times.
B, pneumatic leak test pressure for the nominal pressure of the valve. Times.
C, test pressure in the test duration shall remain unchanged, and shell packing and pneumatic valve sealing surface with no leakage.
D, pneumatic valve test duration according to the table.