| 摘要 |
An annular diaphragm 8 of a differential pressure control valve has an inner peripheral edge portion clamped between a main valve piston 7 and a fixing ring 9 secured to the main valve piston 7, and an outer peripheral edge portion clamped between a body 1 and a cylindrical member 10 secured to the body 1. The cylindrical member 10 slidably receives the main valve piston 7. Thus, the sliding portion of the main valve piston 7 is completely sealed by the diaphragm 8. Inlet pressure P1 is introduced from a refrigerant introduction chamber into a piston chamber 13 only through an orifice 12, to achieve stabilized characteristics of the valve. <IMAGE> |
