High pressure hose drop backflow/back siphonage preventers

摘要: A backflow and back-siphonage preventer assembly, consisting of a ball valve double check with an atmospheric vent, provides isolation protection on high pressure plumbing supply lines, such as hose drops used for the washdown equipment facilities, e.g. in food processing plants. The includes housing inlet, outlet, drain outlet therebetween. first is upstream passage, second downstream sealing member moves between position which passage closed, open. reinforcing operatively coupled to permits operating pressures greater than about 500 psi without blow-out member.