PRESSURE REGULATOR Russian patent published in 1995 - IPC

FIELD: automatic control facilities. SUBSTANCE: pressure regulator has housing 1, seat 2, control valve 4 placed in outlet space 3 and fixed on rod 9 engaging with first arm of bell crank 10 whose second arm is coupled with diaphragm 5 loaded by setting spring 6. Diaphragm 5 and housing 1 form control space 8 accommodating bell crank 10 mounted on axle 12. Compensating extension springs 13 are fixed between second arm of bell crank 10 and housing 1 at opposite side behind live axle 12 between rod and diaphragm. EFFECT: increased range of control, higher accuracy of outlet pressure maintenance in wide range of flow variations owing to compensation for efforts of inlet pressure and change of setting spring effort caused by change in flow rate. 3 dwg