초록 ▼

A convertible two-mode pressure regulator in which a main valve regulates fluid flow between an inlet and an outlet in response to a control pressure produced by a mechanically operated regulator valve, the control pressure depending on the outlet pressure and the force applied by a compression spri

A convertible two-mode pressure regulator in which a main valve regulates fluid flow between an inlet and an outlet in response to a control pressure produced by a mechanically operated regulator valve, the control pressure depending on the outlet pressure and the force applied by a compression spring to a diaphragm carrying a regulator valve closure element. Compression of the regulator spring is controlled by a mechanical lever assembly and a shaft assembly which is selectively positionable by a selector knob to obtain higher or lower regulator spring force. Adjustable stops provide for individual adjustment of low and high outlet pressures for each of two pressure ranges.

대표청구항 ▼

[ What is claimed is:] [21.] A method of calibrating a pressure regulating valve of the type which produces any one of four predetermined selectable outlet pressures, the outlet pressure being determined by the force exerted by a regulator spring of which one end is positioned by a spring seat whose

[ What is claimed is:] [21.] A method of calibrating a pressure regulating valve of the type which produces any one of four predetermined selectable outlet pressures, the outlet pressure being determined by the force exerted by a regulator spring of which one end is positioned by a spring seat whose position relative to the valve housing is variable, the spring seat being biased in a first direction by the regulator spring against a stop formed by a stop assembly including an outer stop member having inner and outer stop surfaces mounted in the housing and adjustable along an axis, a tubular barrel having a bore therethrough mounted in the housing and extending along the axis, a shaft assembly of variable length mounted in the bore in the tubular barrel and slideable relative thereto along the axis, the shaft assembly being adapted to variably extend through the outer stop member to a limit position established in part by an inner stop surface on the outer stop, and means for selectively positioning the shaft assembly against a first variable position inner stop in the tubular barrel in a direction away from the spring retainer or in a direction toward the spring retainer against a second variable position stop in the tubular barrel or the inner stop surface of the outer stop member, the method comprising the steps of:positioning the shaft assembly against the first inner stop member in the tubular barrel;adjusting the outer stop member to position the spring retainer in a first position relative to the housing corresponding to a first desired outlet pressure;positioning the shaft assembly against the inner stop surface of the outer stop member;adjusting the length of the shaft assembly so that the end thereof extends beyond the outer stop surface by an amount sufficient to position the spring retainer in a second position relative to the housing corresponding to a second desired outlet pressure;adjusting the position first inner stop in the tubular barrel away from the spring retainer by an amount to sufficiently withdraw the first end of the shaft assembly to locate the spring retainer in a third position relative to the housing corresponding to a third desired outlet pressure;positioning the shaft assembly against the second stop in the barrel assembly; andadjusting the position of the second stop in the tubular barrel relative to the housing to position the spring retainer in a fourth position relative to the housing corresponding to a fourth desired outlet pressure.