Adjustable flow metering orifice

Details Adjustable flow metering orifice Adjustable flow metering orifice

1977-02-16

1979-01-16

Nilson, Robert G.

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

291571R, 137315, 251359, F16K 112

Patent

active

041345720

ABSTRACT:
An improved self-actuated constant flow rate regulator system is described which can keep the rate of flow of fluid through a filter or other variable load constant within close limits. One application for this invention is for sampling the air for toxic dusts in factories where it is desirable to draw air through a collecting filter at a pre-set rate regardless of the amount of deposit on the filter and where a number of such filters may be connected to a central vacuum pump. The system comprises a differential pressure regulator and an adjustable metering orifice working in conjunction with each other. The regulator senses the pressure drop across the orifice and governs the flow rate accordingly. Details of the regulator valve and of the metering orifice are set forth which contribute to improved operating performance and manufacturing efficiency.

REFERENCES:
patent: 1569024 (1926-01-01), Oliphant
patent: 2363673 (1944-11-01), Jensen

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