Pressure difference relief valve for liquid containers

Details Pressure difference relief valve for liquid containers Pressure difference relief valve for liquid containers

1991-11-22

1992-06-30

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

251 64, 188 67, F16F 708, F16K 3172

Patent

active

051254301

ABSTRACT:
A pressure difference relief valve, viz. a pressure relief valve or a vacuum relief valve, for a liquid container has a valve body which opens or closes a valve opening of a valve housing in response to the pressure difference between the interior of the valve housing and the ambient atmosphere. The valve body is connected to a slidably mounted stem. The valve is constructed with spring elements which are clamped against the stem from opposite sides thereof at a controlled force to create a frictional resistance to sliding movement of the stem. Hereby any tendency of the valve to vacillate between the closed position and a fully open position under the influence of fluctuations of the gas or air flow, e.g. caused by turbulence, is eliminated or reduced.

REFERENCES:
patent: 2091507 (1937-08-01), Hall, Jr.
patent: 4236609 (1980-12-01), Carlsson
patent: 4563004 (1986-01-01), Mattox
patent: 4890641 (1990-01-01), Gavrila

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