Extend the service life of pneumatic valve packing method

to extend the service life of pneumatic valve packing method
in the pneumatic valve design or use experience, elevating the pneumatic valve packing for asbestos packing ptfe or graphite packing or v-shaped packing, but these packing are subject to the limit the number of pneumatic valve opening and closing, is with the increase of number of pneumatic valve opening and closing, packing will wear and clearance increases gradually, to a certain number of times ( According to statistics, no more than time pneumatic valve will be leaked from the packing. Leak after need new compression packing gland. The scheme is suitable for pneumatic valve on-off times of the few.
if pneumatic valve opening and closing of the 'frequent, ( Like a year - opening and closing Ten thousand times, this undoubtedly increase the use of pneumatic valves, maintenance costs. Is there a can in pneumatic valve opening and closing - Can be sealed after ten thousand cycles and still design? The answer is yes.
a way to add a gasket at the bottom of the packing, in here to add a spring gasket ( Spring pre-tightening force need to compute, when packing wear, as a result of the action of the spring, will be back pressure filler, seal. This method by using the test at present, can only achieve - opening and closing Don't leak it ten thousand times, you need to use the party at the annual overhaul, to compress the packing gland, can only reduce the usual maintenance.

pneumatic valve packing manufacturers: yongjia county dense machinery accessories co. , LTD. _ _ _ nut packing gland on the seal seat sets