Natural gas regulator with limited internal relief valve
AssigneeCavagna Group S.P.A.
InventorGiuliano Cavagna
Life of this patent
Estimating the term…
Abstract
An internal relief valve assembly for use with a natural gas regulator having a diaphragm, a piston, a valve stem and an inlet for receiving gas. A first spring surrounds the valve stem and is centered in the diaphragm. A second spring is nested within the first spring for controlling when the internal relief valve opens. A square-ring is positioned within an opening within the valve stem. A first channel is formed in the valve stem and a second channel is formed in the valve stem which is substantively perpendicular to the valve stem and connected to the first channel to circulate the flow of gas through the valve to an outlet.
Claims17
An internal relief valve assembly for use with a natural gas regulator, comprising:
- a regulator having a diaphragm, a valve stem and an inlet for receiving gas;
- a first spring which surrounds the valve stem and is centered in the diaphragm;
- a second spring nested within said first spring for controlling when the internal relief valve will open;
- a square-ring positioned within an opening within the valve stem;
- a first channel formed in the valve stem;
- and,
- a second channel formed in the valve stem which is substantively perpendicular to the valve stem and connected to the first channel to circulate the flow of gas through the valve to an outlet of the regulator.
An internal relief valve assembly comprising:
- a valve stem;
- a bushing surrounding an outer portion of the valve stem;
- a square-ring positioned in an opening formed around an outer portion of the valve stem;
- a first channel formed in the valve stem which extends within a central portion of the valve stem along a longitudinal axis of the valve stem;
- a second channel formed in the valve stem perpendicular to and connected to the first channel to circulate the flow of gas through the valve stem to an outlet of an associated gas regulator.
Dependencies are inferred from the claim text.