Two-way check valve
A technology of check valve and cut-off valve, which is applied in the field of two-way check valve, can solve the problems of inability to maintain communication, etc., and achieve the effects of compact structure, reduced package size, and reduced weight
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[0027] The present invention will be further described below with reference to the drawings and embodiments.
[0028] As the bypass valve of the nuclear island gate valve, the two-way check valve is a single-seat double-seat sliding type. Its function is to ensure that the middle cavity of the nuclear island gate valve is connected to the end of the valve with a higher inlet or outlet pressure to prevent abnormalities in the middle cavity of the nuclear island gate valve The occurrence of pressure boost and pressure lock-in accidents provide guarantee for the safe operation of nuclear power plants.
[0029] Such as figure 1 As shown, the two-way check valve includes a check valve part and an instrument cut-off valve part. The two-way check valve is provided with three connecting ends, namely an inlet end, a middle end and an outlet end. The two-way check valve passes through The check valve disc A6 is respectively connected with the meter stop valve seat B26 at the inlet and outlet...
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