DEPRESSURIZATION UNIT Russian patent published in 1997 - IPC

FIELD: manufacture of fittings; particularly safety systems of nuclear and thermal power stations, chemical and petroleum-and-gas industries. SUBSTANCE: saddle in depressurization unit is made up of two coaxial bushings. Clearance between these bushings forms a space for draining leaking fluid. Gate is made in the form of two sealed plates mounted one in the other. The outer plate is connected immovably with a rod, while the inner plate is spring-loaded and connected with the rod and with the outer plate being adopted to displacement relative the latter. The rod is connected with drive piston with a capability of mutual springy displacement. EFFECT: reliable and safe valve operation. 1 dwg