FLUID PRESSURE REGULATING VALVE HAVING ADJUSTABLE TWO-STAGE AND NATURAL-LP GAS CHANGEOVER CAPABILITIES

• Main Authors: NELSON, MARVIN D, DIETIKER, PAUL
• Format: Patent
• Language: English; French
• Published: 14.05.1991
• Edition: 5
• Subjects: CONTROLLING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

FLUID PRESSURE REGULATING VALVE HAVING ADJUSTABLE TWO-STAGE AND NATURAL-LP GAS CHANGEOVER CAPABILITIES 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