Heating of pneumatic valve closed lax reason and solution

heating pneumatic valve closed lax:
( ） Sealing surface corrosion damage or mild.
( ） Improper operation, closing to seal face contact is not good.
( ） Pneumatic valve rod bending, upper and lower sealing surface not center.
( ） Impurity blocked pneumatic valve core.
heating pneumatic valve closed lax solution:
( ） Adhere to the pneumatic valve in hydraulic pressure test, including strength test and leak test, test unqualified pneumatic valves to check carefully, analysis the reason, gently open/close a few times before you make a test, still closed lax, to unload the collapse of the check, first check the pneumatic valve stem, check the pneumatic sealing face of valve plate, when need to grind. After check repair, grinding, and test again, can overcome the closed lax problem allowed to continue to use, belongs to the pneumatic valve factory product quality problem should return replacement.
( ） Pneumatic valve sealing surface defects including percussion mark, mark, crushed, uneven, dent, etc. , when its depth is less than. Mm, available grinding to eliminate; Depth is greater than. The mm, should be on a lathe processing, and then grinding, are not allowed to repair file or sand paper burnish, etc.
( ） After entry to do a good job of keeping pneumatic valve, not pile up landing, measures should be keep out rain and snow; Pneumatic valve should be vertical storage, don't make the stuff into the pneumatic valve; Pneumatic valve to avoid collision in transportation.
( ） To wash after the pipe installation, should adjust the pneumatic valve, thermostatic valve, pneumatic valve core decompression, flow orifice, filter and so on easy to cause blockage of pneumatic valve removed, after flushing qualified to mount. The direction of the pipe flushing to correctly, to avoid debris blocking in the pipe, water plugging after pneumatic valves.