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The Use of Brass Check Valve and the Method of Solving Common Faults

Brass check valve is a single flow valve that automatically opens and closes by the force of the flow of the medium itself in the pipeline system. Let us analyze the use of brass check valve for you.

1. The use of brass check valve

Brass check valve has threaded connection and flange connection. Brass check valve body and bonnet adopt constant temperature hot forging and tempering process, which greatly improves the mechanical performance and safety factor of the valve.

The installation and debugging of the valve must be carried out by professionals with relevant qualifications. The deviation of the different axial degrees of the pipelines at both ends cannot be too large, otherwise excessive pipeline installation pressure will be generated, resulting in damage to the brass check valve.

The accuracy and effective length of the valve pipe thread are strictly in accordance with the relevant standards of ISO228. When installing and tightening, a wrench or pipe wrench with corresponding torque must be selected, and the effective thread length can be screwed in. Do not cause excessive pressure on the inner end face, resulting in brass one way check valve is deformed, the sealing surface is damaged and leaks.

When installing the flange check valve, it must be ensured that the flange surfaces at both ends of the pipeline are parallel and coaxial, the spacing size is appropriate, the connection screw holes are corresponding, and the deviation should not be too large, otherwise the installation quality and sealing performance of the valve will be affected.

In order to ensure the normal use of the valve, a filter should be installed at the inlet of the pipeline as much as possible. In order to avoid frequent fluctuations in pipeline pressure or temperature and reduce the service life of the valve, corresponding preventive measures should be designed.

2. Common faults and elimination methods of brass check valves?

When the center line of the disc after installation of the straight-through lift check valve is not perpendicular to the horizontal plane, the lift movement of the disc is inflexible, which affects the opening or closing of the valve, and the check is unreliable. In this case, the check valve produced by brass valve factory should be re-installed , so that it is in a position where it can work properly.

The installation of the check valve should pay more attention to the flow direction of the fluid, so that the valve can be automatically closed when the fluid flows in the opposite direction. Damage to the sealing surface of the brass check valve will cause internal leakage of the valve and partial fluid backflow. The sealing ring should be processed or replaced according to the degree of damage to the sealing surface, and then ground and matched with the disc. You can also refer to the common faults and maintenance of globe valves. exclude.

Common faults are:

① valve flap broken;

② medium backflow. The reason for the shattering of the valve disc is that the pressure of the medium before and after the check valve is in a state of close balance and mutual "saw". was broken.

The preventive method is to use a brass check valve with a disc as a ductile material.

The reasons for the backflow of the medium are: ① the sealing surface is damaged; ② the impurities are trapped. By repairing the sealing surface and cleaning impurities, backflow can be prevented.