Anti-cavitation valve seat
AssigneeCla-Val Co.
InventorsRobert Folk, David Becker
Life of this patent
Estimating the term…
Abstract
An anti-cavitation seat which is disposable between an inlet and an outlet of a pressure reducing valve, and including a plurality of inlets causing fluid to flow into a converging pathway to reduce pressure of the fluid. The inlets form a tortuous path for a portion of the fluid flowing into the anti-cavitation seat, so as to further reduce the pressure of the fluid. A standard stem assembly is used in conjunction with the anti-cavitation seat to alter the flow of fluid through the valve.
Claims23
An anti-cavitation seat positionable between an inlet and an outlet of a main valve and relative a non-anti-cavitation disc of a stem assembly so as to cooperate with the disc in opening and closing fluid flow between the inlet and the outlet of the main valve, the anti-cavitation seat comprising:
- a first wall having a plurality of spaced apart apertures formed therein;
- a second wall spaced apart from the first wall and defining an outer chamber between the first and second walls, and an inner chamber, the second wall having a plurality of spaced apart apertures formed therein;
- wherein a tortuous fluid flow pathway is formed between the apertures of the first wall and the apertures of the second wall;
- and
- wherein the apertures of the second wall are arranged so as to direct fluid into the inner chamber such that fluid flow from the second wall apertures converges in the inner chamber.
An anti-cavitation seat positionable between an inlet and an outlet of a main valve and relative a non-anti-cavitation disc of a stem assembly so as to cooperate with the disc in opening and closing fluid flow between the inlet and the outlet of the main valve, the anti-cavitation seat comprising:
- a first wall having a plurality of spaced apart apertures formed therein;
- a second wall spaced apart from the first wall and defining an outer chamber between the first and second walls, and an inner chamber, the second wall having a plurality of spaced apart apertures formed therein;
- a base from which the first and second walls extend;
- a hollow post extending from the base into the inner chamber, the post including apertures formed therein permitting fluid to pass through the post and into the inner chamber;
- wherein the apertures of the post and the apertures of the second wall are arranged to converge fluid flowing from at least a plurality of the post apertures and second wall apertures in the inner chamber.
A method of converting a non-anti-cavitation main valve into an anti-cavitation main valve, comprising the steps of:
- providing a main valve having a fluid inlet and a fluid outlet and a non-anti-cavitation seat disposed between the fluid inlet and the fluid outlet and aligned with a non-anti-cavitation stem assembly disc, the seat and the disc cooperatively acting to open and close fluid flow between the inlet and the outlet of the main valve;
- removing the non-anti-cavitation seat;
- and
- installing an anti-cavitation seat including a first wall having a plurality of apertures and a second wall spaced apart from the first wall and having a plurality of apertures, the first and second walls defining a tortuous fluid flow pathway from the apertures of the first wall to the apertures of the second wall and the apertures of the second wall are arranged so as to converge fluid flow in an inner chamber defined by the second wall, wherein the non-anti-cavitation stem assembly disc and the anti-cavitation seat cooperatively act to open and close fluid flow between the inlet and the outlet of the main valve.
Dependencies are inferred from the claim text.