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Check valve in the process of use, there will be a variety of failures, generally speaking, awareness and composition of the valve parts, parts more fault. The main reason for the backflow of the check valve medium is that the check mechanism is not working or damaged; The sealing surface is damaged and aging, the sealing surface is not closed for a long time, and the adhesion is dirty and can not be well sealed.
After a long time of research, Oriental Zheng Technology found that the main methods to eliminate the dielectric backflow problem of check valve are as follows:
1, regular cleaning, should not use viscosity and containing abrasive media, check the quality of parts processing
2, installation or assembly should be correct, the valve cover should meet the center of the tilt
3. The clearance between the disc shaft and the guide sleeve is moderate, and the influence of temperature change and abrasive intrusion on the lift of the disc should be considered. Regular inspection, regular maintenance and replacement should be conducted
4. Correct selection of sealing surface materials, regular maintenance, regular replacement of rubber sealing surface; If the medium contains more impurities, the filter or blowdown pipe should be set before the valve.
The work of each link is done well, the failure of the valve will be greatly reduced.