Valve and apparatus using said valve

Details Valve and apparatus using said valve Valve and apparatus using said valve

1990-08-30

1991-09-17

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

251 5, F16K 31126

Patent

active

050485598

ABSTRACT:
A valve comprising a rigid tube in which a flexible tube is situated with the two ends of the flexible tube being connected in sealed manner to the ends of the rigid tube, a control orifice being provided through the wall of the rigid tube in the vicinity of its middle region, and a core also being disposed inside the flexible tube, the core being smaller in cross-section than the inside section of the tube when in the rest state, wherein the core has a calibrated internal passage. The valve is suitable for preventing hammer in an installation having two zones at different pressures P1 and P2.

REFERENCES:
patent: 3838704 (1974-10-01), Johnson
patent: 4138087 (1979-02-01), Kruse
patent: 4573491 (1986-03-01), Arens
patent: 4645174 (1987-02-01), Hicks

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