leakage mainly includes the gland leakage and close the leakage reasons of two kinds of stuffing box leaking were: (1) packing and working medium corrosion resistance, temperature, pressure does not adapt, (2) the packing method is wrong, especially packing hovering in the root, the most easily produce leakage; (3) stem machining accuracy and surface finish is not enough, or have ovality, or have a notch; (4) stem pitting corrosion has occurred, or due to a lack of protection in the open air and rust; (5) stem bending; 6 packing used for too long, has been aging; All landowners operation too strong. Close a leak reason mainly has: (1) sealing surface grinding well; (2) the sealing ring and valve seat and Industrial Valves disc with no tightness; (3) the disc and stem connection not firm; (4) stem bend torsion, make up and shut down a wrong; (5) shut down too fast, bad sealing surface contact or already damaged; 6. Improper selection of materials, cannot endure the corrosion of the medium; All landowners will stop valve, gate valve used for adjusting. Seal face cannot endure the erosion of the high-speed flow medium; Today, some media after the valve closed cooling, make the seal face in thin seam, also produces erosion phenomenon; Pet-name ruby some sealing surface and USES threaded coupling between the seat, disc, easy to produce the oxygen concentration cell, loose corrosion; Attending for impurities such as embedded welding slag, rust, dust, or mechanical parts in the production system off plug valve core, valve cannot be locked. Electric valve, pneumatic valve, electric valve, pneumatic Industrial Valves, pneumatic ball valves, electric ball valves
os&y valve double flanged gate valve, device for producing os&y gate valve, cast iron gate valve, and other resilient seal gate valve, consisting of cast iron valve.
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