GAS PRESSURE REGULATOR Russian patent published in 1994 - IPC

FIELD: automatic control. SUBSTANCE: gas pressure regulator has housing 1 with inlet cavity 2 and outlet cavity 3, first valve 4 interposed between them, first sensitive element, e.g. stepped piston 6 acting upon first valve 4 and in an initial position contacting with movable bushing 12 in which piston 10 with second valve 17 are disposed, third valve 12 and check valve 21 situated within the bushing, second check valve 26 for communicating cavity 7 between the steps of the stepped piston with outlet cavity 3. EFFECT: reduced output pressure deviations in time and in magnitude with increased extraction of gas from regulator. 3 cl, 1 dwg