Excess flow check valve capsule
AssigneeMallard Products, Inc.
InventorWallace W. Velie
Life of this patent
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Abstract
A magnetically operated excess flow check valve which permits fluid flow through a line when the flow is below a predetermined flow rate but shuts the flow if the flow rate rises above the predetermined limit to prevent uncontrolled flow or discharge of fluids such as might occur if a fluid line is ruptured including unique packaging or mounting of the excess flow check valve in a capsule to facilitate its installation in various flow lines, fittings, pipe systems, appliances and the like. The packaging is in the form of a self contained capsule which can be inserted in various flow passageways with the capsule facilitating assembly of the individual components into a self contained compact package.
Claims17
A self contained magnetically operated flow valve capsule for insertion into a flow duct comprising a permanent magnet retaining body means, a valve seat body means spaced from said retaining body means, a permanent magnet means mounted in said retaining body means, a valve plate means moveable between said retaining body means and said valve seat body means to control flow through said flow duct, said magnet retaining body means including webs for retaining and centrally positioning the magnet means, a retaining ring means mounted on said webs to retain the capsule in the flow duct, and means on said retaining body means for engaging, indexing, positioning and sealing the retaining body means with respect to the seat body means and accommodating the plate means.
A magnetically operated excess flow valve capsule for installation in a flow passage having an inner peripheral surface defining a flow path, said capsule comprising a valve seat body mounted in the flow path in sealed relation thereto, said valve seat body including a flow passageway therethrough and a valve seat on an upstream end of the valve seat body with the valve seat extending peripherally of said flow passageway, a magnet retainer body mounted in the flow path in sealed relation thereto, means interconnecting said magnet retainer body and said valve seat body to maintain said bodies in fixed spaced relation, a valve plate freely movably mounted in the space between said bodies, magnet means mounted on said magnet retainer body, said valve plate being constructed of material subject to attraction by the magnetic force of said magnet means, said magnet retainer body and valve plate being constructed to enable flow in the flow passage when the valve plate is held in engagement with a downstream end of said magnet retainer body by said magnet means when the flow pressure differential is below a predetermined limit with increase in pressure differential and corresponding increase in drag force exerted on the valve plate by flow past the valve plate overcoming the magnetic attraction and moving the valve plate into engagement with the valve seat on the upstream end of the valve seat body to preclude flow through the flow path.
Dependencies are inferred from the claim text.