초록 ▼

An electromechanical actuator-operated pressure regulator for supplying control pressure for a diaphragm-operated gas control valve, the actuator also operating an on-off control valve for the gas valve. A passageway including a pressure adjusting device for supplying a minimum gas valve output pres

An electromechanical actuator-operated pressure regulator for supplying control pressure for a diaphragm-operated gas control valve, the actuator also operating an on-off control valve for the gas valve. A passageway including a pressure adjusting device for supplying a minimum gas valve output pressure extends from the downstream side of the on-off valve to the gas valve outlet.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or right is claimed are defined as follows:] [1.] In a pressure regulator for generating a control pressure for a diaphragm-operated gas valve which controls gas flow through a first passageway between an inlet and an outlet, the pres

[ The embodiments of the invention in which an exclusive property or right is claimed are defined as follows:] [1.] In a pressure regulator for generating a control pressure for a diaphragm-operated gas valve which controls gas flow through a first passageway between an inlet and an outlet, the pressure regulator being of the type in which the control pressure is determined by an electromagnetic operator which operates a bleed valve including a first closure member carried on a valve stem and an on-off valve including a second closure member carried on the valve stem, the improvement which comprises:a second passageway for supplying gas at an unregulated minimum pressure from the inlet to the outlet of the diaphragm-operated gas valve, said second passageway including means for adjusting the unregulated minimum pressure the on-off valve being arranged to control gas flow through said second passageway; anda throttling device located downstream of said second passageway for supplying gas from the downstream side of said on-off valve to the bleed valve, said throttling device being formed by a gap between the valve stem and a surrounding wall of a bore in a housing assembly in which the diaphragm operated gas valve is formed, said valve stem being positioned to extend through the bore, wherein a first pressure chamber is defined in the housing assembly and is fluidly coupled to said second passageway, a secondpressure chamber is defined in the housing assembly downstream of the first pressure chamber a control chamber of the diaphragm-operated gas valve being fluidly coupled to the second pressure chamber by a third passageway, and a third pressure chamber is defined in the housing assembly downstream of the second pressure chamber and is fluidly coupled to a fourth passageway that bleeds excess pressure to the outlet of the gas valve, the first closure member being located in the third chamber, the first second and third chambers being separated by partitions of the housing assembly.