Valve body leakage Cause: The valve body has sand holes or cracks Solution: Replacing the valve Valve bonnet sealing surface leakage Cause: The fastening force of bolts is insufficient or tight; Gaskets do not meet the requirements or are damaged; The sealing surface is defective. Solution: Retighten the bolts and ensure that the gap between…

1) Check valve appearance to identify the product is damaged or not during the transportation. The valve shall not have cracks, trachoma, mechanical damage, and defects such as rust, the fasteners are loose or damaged. 2) Switch the valve vertically three times, the valve should be opening and closing flexible, no jam phenomenon. Clean the valve,…

Select step Define the purpose of the valve in the equipment or device, determine the working conditions of the valve: applicable medium, working pressure, working temperature, etc. Determine the nominal size and connection mode of the pipe connected to the valve: flange, thread, welding, etc. Determine the way to operate the valve: manual, electric, pneumatic…