Low pressure relief valve

Details Low pressure relief valve Low pressure relief valve

1987-08-26

1988-12-13

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

13754321, 137540, 251 86, 251360, 251363, F16K 1706

Patent

active

047903481

ABSTRACT:
A relief valve for low pressure operation includes a valve body having an enlarged cylindrical bore in alignment with an inlet port and defining a valve chamber. An outlet opens laterally from the valve chamber at a location spaced from the inlet port. An insert member is received in the bore and defines an axially facing raised seat circumferentially about the inlet port at a location closely adjacent the outlet port. A poppet valve with a truncated conical configuration and a maximum outer diameter only slightly less than the inner diameter of the enlarged bore is mounted for engaging the seat and blocking flow through the inlet. A biased stem extends into the valve chamber in axial alignment with the seat insert. The stem has a cylindrical end portion which is received in a cylindrical opening formed axially into the poppet valve on the end thereof opposite the seat insert. The cylindrical end portion and the cylindrical opening are sized to permit lateral shifting and alignment of the poppet valve relative to the seat while preventing excessive and unwanted tilting of the poppet valve relative to the bore.

REFERENCES:
patent: 3362680 (1968-01-01), Weiss
patent: 4335744 (1982-06-01), Bey
patent: 4530373 (1985-07-01), Bork, Jr. et al.
patent: 4637430 (1987-01-01), Scheffel et al.

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