Vacuum breaker valve

Details Vacuum breaker valve Vacuum breaker valve

1987-05-12

1990-09-04

Michalsky, Gerald A.

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

1375124, F16K 2400, E03C 110

Patent

active

049535846

ABSTRACT:
A fluid valve structure which combines anti-siphon and anti-backflow features in a single element. The valve utilizes an insert which separates the valve body into two distinct and non-communicating chambers, permits the flow of air through one of the chambers and fluid through the other and fixes a flexible flapper-type diaphragm over the entry passages into the chambers. Due to the flexibility of the diaphragm and the independence of the chambers, that portion of the diaphragm in each chamber operates independently of the other in response to varying conditions of pressure and flow.

REFERENCES:
patent: Re30849 (1982-01-01), Crist
patent: 2449573 (1948-09-01), White
patent: 3482736 (1969-12-01), Green
patent: 4080981 (1978-03-01), Stewart
patent: 4117856 (1978-10-01), Carlson

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