REDUCER Russian patent published in 2012 - IPC G01L7/00 G05D16/00 

FIELD: machine building.

SUBSTANCE: invention may be used in various fields of industry for reduction of gas pressure to the specified value and automatic maintenance of the specified pressure under cryogenic temperatures of working medium, in particular, when testing various devices with "cold" helium. In a reducer comprising a body, inlet and outlet nozzles, a filter at the inlet, a membrane unit with a loading spring, resting against a plate pressed with an adjustment screw, installed in a sleeve, a seat, a lever on an axis, fixed in the body, interacting with a needle to change the seat throughput section, according to the invention the membrane of the membrane unit along the outer diametre has flanging, for which a circular groove is arranged in the sleeve, at the same time on the membrane flanging at both sides there are rings fixed by means of welding, besides, the inner ring interacts with the sleeve, and the outer ring via a conical sealing gasket - with the reducer's body, in which there are semicircular stops that limit membrane sagging under action of a loading spring, and there is a damping unit, the stem of which, arranged at one axis with the membrane unit, at one side interacts with a spring-loaded split bushing, at the other - via a hinged joint is connected with a lever and a membrane unit, besides, between conical surfaces of the adjustment screw and plate there is a ball, at the outlet of the reducer there is a filter.

EFFECT: using reducer under cryogenic temperatures with provision of stability of its operation and tightness when operating with cold helium.

2 cl, 4 dwg