Self-priming pump system having diaphragm-type flow sensor

Details Self-priming pump system having diaphragm-type flow sensor Self-priming pump system having diaphragm-type flow sensor

1982-12-16

1985-06-04

Yuen, Henry C.

Rotary kinetic fluid motors or pumps

With pump recirculation passage control responsive to...

F01B 2500

Patent

active

045211566

ABSTRACT:
A self-priming system for liquid pumps wherein a priming valve is provided to convey a quantity of priming liquid to the pump upon loss of pump suction. A pilot valve is provided to regulate the pressure against a piston which serves to maintain the priming valve closed. The pilot valve controls the liquid pressure exerted against the piston and thereby regulate the pressure level at which the priming valve will open. The pilot valve can be electrically actuated by means of a flow sensor including a diaphragm operated switch responsive to liquid flow.

REFERENCES:
patent: 2470565 (1949-05-01), Loss
patent: 3370604 (1968-02-01), Napolitano
patent: 3381618 (1968-05-01), Napolitano
patent: 4255079 (1981-03-01), Piegza

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