Backflow preventer apparatus

Details Backflow preventer apparatus Backflow preventer apparatus

F - Mech Eng,Light,Heat,Weapons

16

K

137/16

F16K 15/06 (2006.01) F16K 24/00 (2006.01)

Patent

CA 1223497

BACKFLOW PREVENTER APPARATUS ABSTRACT OF THE DISCLOSURE A backflow preventer apparatus designed for connection between a supply pipe having liquid under pressure and a service pipe, the backflow preventer apparatus comprising a pair of check valves in series and defining a zone therebetween, a relief valve operable upon a change in differential pressure across the upstream check valve, and a vacuum breaker operable upon a drop in pressure in the zone to a predetermined pressure supply above atmospheric pressure. The differential pressure operable relief valve, when opened upon certain operating conditions, causing the zone to drain to atmosphere. The vacuum breaker operates independent of supply pipe pressure or service pipe pressure but solely on a drop in pressure in the zone.

513975

Affiliated with

Also associated with

Rating

Backflow preventer apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Backflow preventer apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backflow preventer apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1215166