Fluid pressure regulating valve having adjustable two-stage...

Details Fluid pressure regulating valve having adjustable two-stage... Fluid pressure regulating valve having adjustable two-stage...

G - Physics

05

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137/38

G05D 16/00 (2006.01) G05D 16/06 (2006.01) G05D 16/20 (2006.01)

Patent

CA 1284079

FLUID PRESSURE REGULATING VALVE HAVING ADJUSTABLE TWO-STAGE AND NATURAL-LP GAS CHANGEOVER CAPABILITIES ABSTRACT A fluid pressure regulating valve having a two-stage high and low flow rate control capability combined with natural-LP gas control pressure changeover uses a spring biased pressure regulating diaphragm controlling a fluid through an orifice defined by a valve seat. A solenoid valve armature is attached to a spring providing the spring bias for the diaphragm and is arranged to be actuated by a selectively energizable solenoid coil. An extension of the armature is captured by a step regulator assembly which is threaded into a valve body containing the regulating diaphragm. The high fire and low fire adjustments in the step regulator assembly are on non-moving threaded members attached to the regulator assembly and bearing on the extension of the armature to vary the energized and deenergized position of the solenoid armature. A positive temperature coefficient material heated by an energizing

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