Conbraco Reduced Pressure Backflow Preventer

Out of stock
SKU
00001088

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Conbraco Reduced Pressure Backflow Preventer
The Conbraco Series 40-200-TC2 Reduced Pressure Principle Backflow Preventer with SAE threaded hose connections make certification testing fast and trouble-free, especially in tight installations. It is designed to give maximum protection against backflow caused by either back-pressure or back-siphonage. The durable, but economical, device is easily maintained in the line without any special tools. It consists of two independently acting spring-loaded check valves with an automatic differential relief valve located between the check valves. The diaphragm and the sensing passage are built into the all bronze body to eliminate possible damage.

Features
Maximum protection against backpressure/backsiphonage
Removable discs
Internal sensing passage
Designed for easy maintenance
Low head loss
Economical
Corrosion resistant
Comes standard with Apollo full port ball valves with steel handles
Maximum working pressure 175 psig
Operating temperature range 33F-180F
Replaceable seats

Operation
During normal flow conditions, the two check valves are held off their seats, supplying water downstream. The relief valve is held shut by supply pressure acting through the internal sensing passage, on the relief valve diaphragm. In the area between the check valves, called the zone, the pressure is maintained at approximately 7 psi lower than supply pressure. Should a back-pressure or back-siphonage condition occur, the second check valve will seal, prohibiting the backflow of water. Should the second check valve become fouled, the pressure in the zone will increase causing the differential relief valve to open to atmosphere. This will maintain the pressure in the zone at least 2 psi lower than supply pressure.

Materials
Part Materials
Body and covers Bronze
Springs Stainless Steel
Poppets Glass-filled Celcon
Seat Discs Silicone rubber
Diaphragm Nitrile and Nylon
R. V. Stem Noryl
Fasteners Stainless Steel
Replaceable Seats Glass-Filled Noryl


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