GAS PRESSURE REGULATOR Russian patent published in 1994 - IPC

FIELD: automatic control. SUBSTANCE: regulator has housing 1 with inlet cavity 2 and outlet cavity 3 separated by first valve 5, first sensitive element in the form of stepped piston 6 and second sensitive element in the form of piston 10 coupled with second and third valves 15 and 19 responsive to an output pressure and providing correction for output pressure and precise control by filling/emptying the cavities. The regulator is characterized by the relationship of structural parameters to provide minimum possible output pressure which can be calculated from the expression given in the invention description. EFFECT: widened output pressure range towards lower values. 1 dwg