Dry pipe valve for fire protection sprinkler system

Details Dry pipe valve for fire protection sprinkler system Dry pipe valve for fire protection sprinkler system

2008-01-07

2010-10-19

Nguyen, Dinh Q (Department: 3752)

Fire extinguishers

Processes

Of extinguishing fire

C169S043000, C169S017000, C169S022000, C169S019000, C169S020000, C137S015180, C137S516250, C137S527800, C137S523000, C251S359000

Reexamination Certificate

active

07814983

ABSTRACT:
A fire protection system comprises a supply pipe having a first fluid pressurized to a first pressure and a network of pipes having a plurality of sprinklers. The network of pipes have a second fluid being pressurized to a second pressure at approximately 5.5 times the first pressure. The system further comprises a dry pipe valve including a body defining a passage extending along a longitudinal axis between an inlet coupled to the supply pipe and an outlet coupled to the network of pipes. The inlet has an inlet diameter of approximately WD inches and a seat disposed in the body has a seating surface with a diameter AD approximately less than two times WD inches. The dry pipe valve further includes a clapper pivotable about an axis orthogonal to the longitudinal axis between a first position occluding the passage when the ratio of the second pressure to the first pressure is at least 5.5 and a second position permitting fluid flow through the passage when the ratio is less than 5.5.

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