Check valve assembly for corrosive fluids

Details Check valve assembly for corrosive fluids Check valve assembly for corrosive fluids

1989-11-30

1990-08-07

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

13753313, 13753315, 251368, F16K 1504

Patent

active

049459457

ABSTRACT:
A high pressure check valve assembly includes a ceramic cage loosely fitted into the bore of a body so as to leave at least a partial clearance between the cage and the body. A passage through the cage includes a retaining section adjacent a fluid inlet end for loosely containing a ball and an irregular cross-section adjacent the retaining section so as to obstruct the ball without hindering fluid flow forwardly through the passage. The cage further has a lateral bleed hole between the passage and the clearance to equalize fluid pressure. An outlet-end sealing member is press fitted into the bore against the outlet end of the cage. An oversized resilient washer-shaped inlet-end sealing member is press fitted into the bore against the inlet end of the cage to seal and retain the assembly. This member has a central aperture with a washer shaped seat member fitted therein, the seat member functioning with the ball as the check valve.

REFERENCES:
patent: 3661167 (1972-05-01), Hussey
patent: 4139469 (1979-02-01), Rainin
patent: 4862907 (1989-09-01), Ledtje

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