Common faults of gate valve mainly include the following aspects:
Sealing surface leakage: sealing surface leakage is one of the common faults of gate valve. Possible causes include aged, worn or corroded seals, damaged or dirty sealing surfaces, etc. Solutions include replacing the sealing ring, cleaning the sealing surface, adjusting the mating degree of the sealing surface, etc.
Falling off of gate: the falling off of gate will cause the valve unable to close or open normally. Possible causes include loose or loose bolts and improper fitting between the gate and the valve seat. Solutions include tightening or replacing bolts, checking the fit between the gate and the valve seat, etc.
Packing Leakage: Packing leakage is usually caused by aging, wear or improper installation of packing. Solutions include replacing packing, reinstalling packing, and ensuring packing tightness.
Jamming of valve rod: Jamming of valve rod will cause the valve unable to rotate normally. Possible causes include rust on the valve stem surface, seized packing, or poor lubrication. Solutions include cleaning the valve stem surface, changing the packing, adding lubricant, etc.
Blockage of fluid passage: Blockage of fluid passage may cause the valve to not work properly. Possible causes include foreign matter or particulate matter in the fluid entering the interior of the valve and crystals in the fluid forming a blockage in the interior of the valve. Solutions include cleaning the inside of the valve, filtering and cleaning the fluid periodically, etc.
For the above faults, the following preventive measures can be taken:
Regular inspection and maintenance: regularly check the sealing surface, packing, valve stem and other parts of the valve to ensure their normal operation and find out potential problems as soon as possible.
KEEP CLEAN: regularly clean fluid passages to prevent foreign matter and particulate matter from entering the interior of the valve, causing plugging or wear.
Proper use: properly use the valve according to the instructions to avoid overload use or misoperation.
Material selection and procurement: select good valves and accessories to ensure long service life and good reliability.
Maintenance and repair: regularly maintain and repair the valve, and timely handle faults and problems to ensure its normal operation and working performance.
To sum up, for common faults of gate valves, corresponding solutions shall be taken to repair or replace parts. Meanwhile, preventive measures shall be taken to reduce the risk of faults and ensure the normal use and working performance of gate valves.
