High pressure relief valve for use with a backflow preventer

Details High pressure relief valve for use with a backflow preventer High pressure relief valve for use with a backflow preventer

1998-03-27

1999-09-14

Michalsky, Gerald A.

Fluid handling

Processes

Involving pressure control

13711513, 13711518, 137218, 137334, 1375123, F16K 1704

Patent

active

059506539

ABSTRACT:
A backflow preventer assembly installed between a supply line and a service line, comprising one or more check valves and a high pressure relief valve operating to discharge water in the service line under a high pressure condition.

REFERENCES:
patent: 4044787 (1977-08-01), Sutherland
patent: 4090527 (1978-05-01), Sutherland
patent: 4241752 (1980-12-01), Ackroyd
patent: 4249556 (1981-02-01), Waletzko
patent: 4276897 (1981-07-01), Griswold
patent: 4489746 (1984-12-01), Daghe et al.
patent: 4506694 (1985-03-01), Daghe et al.
patent: 4553563 (1985-11-01), Daghe et al.
patent: 4658852 (1987-04-01), Weingarten
patent: 5299592 (1994-04-01), Swanson
patent: 5551473 (1996-09-01), Lin et al.
patent: 5682920 (1997-11-01), De'Longhi

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