Valve arrangement

Details Valve arrangement Valve arrangement

1988-03-02

1989-09-05

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Line flow effect assisted

1374925, 1376275, F16K 31124, G05D 1616

Patent

active

048629120

ABSTRACT:
The invention provides a valve arrangement with a pressure control valve placed on a pressure line extending between a source of fluid under pressure and a pressure system in which a constant pressure is to be maintained. The pressure control valve is able to be operated in response to a pressure sensor which is preferably in the form of a venturi element. This pressure sensor is arranged in the pressure line is placed downstream from the pressure control valve and is connected with at least one control port of a pressure switching valve arrangement subject to switching hysteresis, for the pressure control valve. The pressure control valve arrangement is operated by the pressue measured at the position of the pressure sensor. In order to amplify this signal there is the downstream pressure control valve. Owing to overlapfree switch made possible by the hysteresis long venting cycles are prevented and the number of switching operations reduced.

REFERENCES:
patent: 1190799 (1916-07-01), Rene137488

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