Possible Faults Causes of Failure Remedy Flange connection part Leakage flange Connection bolts are not tightened or loosened Uniformly retighten the bolts Washer failure Replace the gasket Flange between sealing surfaces Remove the cleaning flange Packing Letter leakage Packing loose or packing gland deviation Packing packing gland should be uniform compression Packing failure Replacement Packing new sealing surface Leakage Seal surface with dirt Cleaning sealing surface sealing surface damage Re-grinding Stem rotation Inflexible packing Too tight pressure adjustment packing tightness between the stem and the stem nut debris jamming, the threaded part of the damage apart or clean the damaged part of the thread damage electric device failure according to the instructions to check and repair possible failure causes of the failure to eliminate Method Flange connection Portion Leakage Flange connection Bolt not tightened or unevenly tightened Re-tighten bolt evenly Washer failure Change gasket Flange between sealing surfaces Remove cleaning flange Packing box Leakage Packing Loose packing or packing gland Deviation should be uniformly compressed packing gland packing failure Replace the packing surface leak sealing surface with dirt Clean the sealing surface seal surface damage Reshape the valve stem rotation is not flexible Packing pressure is too tight Adjust the tightness of the packing Stem and stem nut between the debris jamming thread part of the damage Disassembly cleaning or repair thread damage part of the electric Device failure according to the instructions to check and repair
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