- Main causes of valve internal leakage
1. Sealing surface wear: The sealing surface of the valve will wear during long-term use, especially under high temperature, high pressure, and high-speed fluid conditions. Wear of the sealing surface will cause the valve to fail to close completely, resulting in internal leakage.
2. The sealing packing is loose or aged: The packing of the valve is a key part to ensure the sealing. If the packing is loose or aged, the valve core will not be able to closely fit the valve seat, causing internal leakage.
3. The valve core and valve seat do not match: The matching accuracy of the valve core and valve seat directly affects the sealing performance of the valve. If the valve core and valve seat do not match, good sealing effect will not be achieved, resulting in internal leakage.
4. Spring is loose or failed: The spring in the valve plays a role in tightly fitting the sealing surface. If the spring is loose or failed, the sealing performance of the valve cannot be ensured, resulting in internal leakage.
- Solution
1. Replace the sealing surface and packing: Regularly check and replace the sealing surface and packing of the valve to ensure that it is within the normal working range and avoid internal leakage due to wear or aging.
2. Adjust the gap between the valve core and the valve seat: By adjusting the matching gap between the valve core and the valve seat, ensure the best sealing performance of the valve and reduce the occurrence of internal leakage.
3. Repair or replace the spring: Check whether the spring in the valve is loose or failed, repair or replace it in time to ensure that the valve can be closed normally and tightly to avoid internal leakage.
4. Regular maintenance and inspection: Carry out regular maintenance and inspection of the valve, clean the impurities and dirt inside the valve, and ensure the normal operation and sealing performance of the valve.
5. Select the appropriate valve: When designing and selecting valves, the appropriate valve type and material should be selected according to the specific working conditions and medium characteristics to improve the wear resistance and sealing performance of the valve.
