INDIRECT PRESSURE REGULATOR Russian patent published in 1999 - IPC

FIELD: hydropneumatic control equipment, in particular, for gas pressure regulation at output of gas-distribution stations. SUBSTANCE: device has input and output chambers, cylindrical housing which has inner wall and is coaxial with respect to gas output chamber, regulation body, which is designed as mobile piston valve, which is spring-loaded to saddle by means of returning spring with respect to wall. In addition device has sensitive member which is designed as piston which runs between wall and back cover of housing. Position of sensitive member and piston provides unloading chamber, chambers of control and output pressures. In addition mobile piston valve and piston are connected by means of rod which is coaxial to housing. Said rod together with stationary cylinder, which spherical bottom is pressed against back cover of housing, provide additional unload chamber. Rod is equipped with through channels for communication of main and additional unload chambers to input chamber by means of by means of total pressure receiver, which has pipe, which is coaxial rod and is equipped with cross-over channels, which cross section is less than half of cross section of input channel. EFFECT: no limitation on diameter of housing to provide recover of pressure by moving regulation valve under slight deviations of pressure in output gas chamber, increased reliability of gaskets at mobile cone of valve and increased reliability of regulation mode due to constant pressure in chambers. 3 dwg