| 摘要 |
A pressure regulating device 1 comprises a housing having inlet ducts 7, 8 and defining therein mutually opposed chambers 3, 4 which are sealed from one another by means of a flexible diaphragm 5. The diaphragm 5 is coupled to respective regulating valves 9, 10 arranged upstream of the chambers 3, 4 in such a way that increase in fluid pressure in chamber 3 displaces the diaphragm to reduce the flow rate into that chamber and that for an operational range of inlet pressures an equilibrium condition of the diaphragm 5 and valves 9, 10 is maintained wherein the ratio between the fluid pressures in the respective chambers 3, 4 and accordingly at respective outlet ducts 11 of the device 1 remains substantially constant. In other embodiments two axially-spaced diaphragms 5 are rigidly connected by a push-rod (20, Figs. 3, 5) and positively secured to valves 9, 10. <IMAGE> |
