Seal gate valves is refers to the valve stem middle part has a sealing surface, a seal seat cover inside, when fully open contact together, sealing effect, reduce the fluid erosion of the fillers, prolong the service life of the packing, the possibility of reducing the leakage. Generally for gate valves, globe valves have pour sealing requirements. Seal gate valves in the fully open position, the joint of the disc and stem and valve stem and valve cover internal ( That is the bottom of the stuffing box) A sealing structure, fully open when both contact squeeze together, and the sealing effect, reduce internal stress of gland packing erosion, prolong the service life of the packing, the possibility of reducing the leakage. Generally for gate valves, globe valves have pour sealing requirements. Gate valves are as one of the most commonly used as medium circulation Industrial Valves, the sealing element is the valve plate, the gate valve and gate valve said. Most gate belong to mandatory seal valves, that is, when close the valve, must be pressure to the valve plate. Gate valves in the fully opened, flow channel, flush valve plate is almost not affected by media. Pour out seal gate valves with sealing device, the valve in the fully open, forming sealing, but under the condition of the normal operation of system change of packing.
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