Standby sealing structure with low-pressure automatic sealing function
A technology of automatic sealing and backup sealing, which is used in valve shell structure, sliding valve, mechanical equipment, etc. to achieve reliable sealing effect.
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[0011] The backup sealing structure of low pressure automatic sealing, the gate and the valve seat adopt a hard-to-soft reliable sealing structure, the front valve seat and the gate adopt the sealing form of double O-ring and hard alloy; the rear valve seat and the gate adopt Single-lane O-ring and cemented carbide sealing form. The front valve seat and the nozzle adopt a structure that can inject substances externally, and the closed space formed between the double O-ring and the gate plate together constitutes a special sealing structure, which makes the valve in low pressure or large diameter (with a wide When the sealing surface) is not easy to seal, the applied pressure will make the valve establish a reliable seal.
[0012] The backup sealing structure of low pressure automatic sealing is to make the valve under low pressure or large diameter (with a wide sealing surface) difficult to seal, and the external pressure can make the valve establish a reliable seal. It is ma...
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Abstract
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