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> Conbraco 40-203-T2 reduced pressure backflow preventer
Conbraco 40-203-T2 reduced pressure backflow preventer
This is a 1/2" model # 40-203-99T now known as 40-203-T2
1/2" BACKFLOW PREVENTER W/TOP COCKS
Series 40-200 Reduced Pressure Principle 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.
Maximum protection against backpressurel
Removable discs, replaceable seats
Easy to maintain, corrosion resistant
Standard with Apollo@ full port ball valves
Maximum working pressure 175 psi
Operating temperature range 33 F-180 F
During normal flow conditions, the two check
valves supply water downstream. The relief
valve is held shut by supply pressure in the
internal sensing passage, on the relief valve
diaphragm. The zone (area between the check
valves) maintains pressure at approximately 7
psi lower than supply pressure. Should a backpressure
or back-siphonage condition occur, the
second check valve will seal, prohibiting the
backflow of water. Should the second check
valve become fouled, the zone pressure
will increase opening the differential relief
valve to atmosphere. This will maintain m Con braco
the pressure in the zone at least 2 psi
ASSE 101 3, AWWA, IAPMO, CSA B64.4, USC
