Isolating device

F - Mech Eng,Light,Heat,Weapons – 16 – K

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137/34

F16K 31/48 (2006.01) F16K 17/04 (2006.01) F16K 17/08 (2006.01) F16K 27/02 (2006.01)

Patent

CA 1188956

ABSTRACT OF THE DISCLOSURE Isolating device for positioning in a circuit upstream of a safety valve, wherein it comprises a poppet valve which can tightly bear against a valve seat formed in said circuit, the poppet valve normally being kept away from its seat by neutralizat- ion means which can be operated to bring the poppet valve into tight engagement with its seat when it is necessary to isolate the safety valve, whilst, calibrat- ion means act on the poppet valve when it tightly bears against its seat to enable it to move away from the latter when the pressure upstream of the isolating device exceeds a predetermined value. Application to the primary cooling circuits of nuclear power stations.

374290

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