Fluid Control Valve casting defects during production

Fluid Control Valve The valve plug and seat are deformed and leaked. The main reason is that the casting defects in the production process of Fluid Control Valve can lead to the strengthening of corrosion, and the passage of corrosive media, the flushing of the fluid medium can also cause the internal leakage of the Fluid Control Valve. Corrosion is mainly in the form of erosion or cavitation. When the corrosive medium passes through the Fluid Control Valve, it will erode the valve seat, causing the valve core and seat to deform or create a gap. Solution: The key is to select the quality and quality of the valve seat material, and it can strengthen the hardness of the sealing surface.

The internal leakage is caused by impurities in the medium or welding slag of the new pipe that scratches the Fluid Control Valve sealing surface. Solution: The new pipe should be purged or a filter installed in front of the Fluid Control Valve. Once the internal leak is generated, the Fluid Control Valve can be disassembled, the valve plug and seat can be reground, and assembled.

The metal surface of the part where the stuffing box is in contact with the filler should be finished to improve the surface finish and reduce the friction of the filler. 3) Flexible graphite is used for the filler, because it has good air tightness, low friction, small change after long-term use, small wear and tear, and easy maintenance. Through the above points, the reliability and long-term stability of the packing seal can be ensured.