Fuel control valve construction, parts therefor and methods of making the same
In a fuel control valve construction having a housing means provided with an inlet adapted to be interconnected to a fuel source and an outlet adapted to be interconnected to a burner, this patent describes the housing means having a main pressure regulator means and a main valve means operated by the main pressure regulator means for controlling fuel flow from the inlet to the outlet to provide a full rated flow of fuel to the burner. The housing means have a by-pass means for interconnecting the inlet to the outlet to provide a fuel flow to the burner that is less than a full rated flow of fuel but is sufficient by itself to support combustion at the burner until the main valve means provides the full rated flow of fuel thereto. The improvement consists of the housing means having a by-pass pressure regulator means for controlling the flow of fuel through the by-pass means independently of the operation of the main pressure regulator means, the main pressure regulator means and the by-pass regulator means each being responsive to pressure in the outlet, the by-pass regulator means comprising a normally biased open pressure regulator means which is adapted to be closed by the pressure in the outlet when the full rated flow of fuel is being provided to the burner by the main valve means whereby only the by-pass pressure regulator means of the two pressure regulator means is adapted to control the pressure of the fuel flow that is less than a full rated flow of fuel and only the main pressure regulator means of the two pressure regulator means is adapted to control the pressure of the full rated flow of fuel.
- Assignee:
- Robertshaw Controls Co., Richmond, VA
- Patent Number(s):
- US 4706704
- OSTI ID:
- 5684668
- Resource Relation:
- Patent File Date: Filed date 11 Jun 1986
- Country of Publication:
- United States
- Language:
- English
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Fuel control valve construction, parts therefor, and methods of making the same
Fuel control valve construction, parts therefor and methods of making the same