Variable orifice gas flow modulating valve

Details Variable orifice gas flow modulating valve Variable orifice gas flow modulating valve

2007-05-22

2011-10-04

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

C236S00100H, C137S601190

Reexamination Certificate

active

08028968

ABSTRACT:
A temperature control system for a gas appliance utilizes an improved variable orifice gas flow modulating valve (10) capable of direct modulation of gas flow through an orifice (20) directly into a gas burner (54) to provide a constantly maintained temperature in an appliance working compartment, as selected by human interface via a temperature selector. An actuator (12) attached to a gas fitting body (14) of the valve provides for linear movement of a metering pin (16) into the taper inside the orifice, accomplishing the variable controlled modulated flow of gas directly into the burner. The actuator (12) is controlled by an input signal from a programmable controller (90) whose output is determined by calculations based on inputs from a temperature selector and a temperature sensor located in the gas appliance working compartment.

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Patriot Supply; Robertshaw Single Gas Valve; www.patriot-supply.com/products/showitem.cfm/7449; Dtd: May 14, 2007.

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