초록 ▼

A two-stage regulator includes first and second regulator units in series. The regulator units are mounted upon a unitary base which forms the lower portion of each regulator and includes the inlets and outlets for each regulator unit as well as a passageway between the units. Each of the regulator

A two-stage regulator includes first and second regulator units in series. The regulator units are mounted upon a unitary base which forms the lower portion of each regulator and includes the inlets and outlets for each regulator unit as well as a passageway between the units. Each of the regulator units is of the diaphragm and main spring type. The first regulator unit, which operates upon the input high-pressure flow, includes a valve assembly proximate the diaphragm. The second regulator unit, which decreases the pressure of the intermediate pressure flow to the final low-pressure outlet flow includes a stem mounted to the diaphragm which terminates at a valve assembly displaced from the diaphragm body. In a preferred embodiment, the surface area of the low-pressure regulator unit is approximately 25% greater than the surface area of the high-pressure unit. The pressure control system of the second regulator unit may also include a nozzle assembly to increase the velocity of the exiting gas and a aspirator tube which utilizes the high velocity gas to modulate the diaphragm. Such a construction can provide high accuracy and rapid response of the system.

대표청구항 ▼

A two-stage gas regulator for providing a low-pressure flow output from a high-pressure flow input, comprising: a unitary base, said base including a first section forming a lower portion of a first regulator unit and a second section forming a lower portion of a second regulator unit, each of said

A two-stage gas regulator for providing a low-pressure flow output from a high-pressure flow input, comprising: a unitary base, said base including a first section forming a lower portion of a first regulator unit and a second section forming a lower portion of a second regulator unit, each of said lower portions including a gas inlet and a gas outlet for each of said regulator units; a channel coupling said outlet of said first regulator unit to said inlet of said second regulator unit; first and second regulator bonnets mounted to said first and second lower portions, respectively, to form respective housings for said first and second regulator units., said first and second bonnets being of the same size, said first bonnet having interior threads for mounting upon said first base section and said second bonnet having exterior threads for mounting upon said second base section; and pressure control means comprising a diaphragm mounted within each of said first and second regulator unit housings for regulating a flow of gas passing therethrough, the pressure control means of said first regulator unit adapted to transform said high-pressure input to an intermediate pressure flow, the pressure control means of said second regulator unit adapted to transform said intermediate pressure flow to said low-pressure output, the surface area of said diaphragm unit being about 25 percent greater than the surface area of said diaphragm of said first regulator unit.