Catalog: Backflow Preventers - Diamond Head Sprinkler Supply

Reduced PressureBackflow PreventersSizes 1/4", 3/8", 1/2", 3/4", 1"MATERIALSBody and CoverSpringsFastenersPoppetsSeat DiscsDiaphragmand O-RingsReplaceable SeatsTest Cocks & HandlesContact local water authorities forinstallation/service requirements.Stainless SteelStainless SteelStainless SteelGlass-Filled CelconSilicone RubberFDA FluorocarbonGlass-Filled NorylStainless SteelRP-40S SeriesSTAINLESS STEEL REDUCED PRESSURE PRINCIPLEBACKFLOW PREVENTERThe Apollo Series RP-40S Stainless Steel Reduced Pressure Principle Backflow Preventer isdesigned to give maximum protection against backflow caused by either backpressure or backsiphonagefrom a cross-connection wherein a contaminant hazard exists (i.e. a health hazard),or a pollutant hazard exists (i.e. a non-hazard). The assembly is composed of two spring-loadedpoppet type check valves and a mechanically independent, hydraulically dependent pressuredifferential relief valve set in an integral stainless steel body. Three of the testcocks are mountedat the top to assure easy access during repair and maintenance when unit is installed intight places.OPERATIONDuring normal flow conditions, the two check valves are held off their seats, supplying waterdownstream. The relief valve is held shut by supply pressure acting through the internal sensingpassage, on the relief valve diaphragm. In the area between the check valves, called thezone, the pressure is maintained at approximately 7 psi lower than supply pressure. Should aback-pressure or back-siphonage condition occur, the second check valve will seal, prohibitingthe backflow of water. Should the second check valve become fouled, the pressure in the zonewill increase causing the differential relief valve to open to atmosphere. This will maintain thepressure in the zone at least 2 psi lower than supply pressure.FEATURES• Stainless steel body and covers• Easy to install and repair• Internal sensing passage• Low head loss• Reversible/Removable seat discs• Replaceable seats• Comes standard with Apollo ® stainless steelfull port ball valves with stainless steel handles• Maximum working pressure 175 psig• Temperature range 33°F-180°F• USC FCCCHR• ASSE 1013• CSA• Designed, manufactured, assembled andtested in South Carolina, USAORDERING CODE -40 - 2 X X - T X SOPTIONS (CAN BE COMBINED)F-SAE threaded test cocksLL-locking lever handlesFlow Curves : (*) Rated flow as determinedby USC’s FCCC&HR and ASSEdesign performance standards.Y-STRAINER0-Standard1-w/ SS Y-strainer(shipped loose)SIZE1-1/4"2-3/8"3-1/2"4-3/4"5-1"SHUT-OFF VALVES1-less ball valves (UL classified-3/4”,1”)2-w/SS ball valves (Standard)See page 37 for air gap drain information.Dimensions (in.) – Weights (lbs.)Body Size 1/4" 3/8" 1/2" 3/4" 1"A 10-1/2 10-1/2 10-1/2 13-1/2 15-1/4B 5-3/4 5-3/4 5-3/4 7-15/16 7-15/16C 6-7/8 6-7/8 6-7/8 9 9D 2-5/8 2-5/8 2-5/8 4-1/16 4-1/16E 3-3/16 3-3/16 3-3/16 4-3/8 4-3/8F 3-3/4 3-3/4 3-3/4 5-1/8 5-1/8Test Cocks1/8 x 1/4NPT 1/8 x 1/4NPT 1/8 x 1/4NPT 1/8 x 1/4NPT 1/8 x 1/4NPTNet Wt. (w/o Ball Valves) 4-1/4 4-1/4 4-1/8 8-1/4 8-1/8Net Wt. (with Ball Valves) 5-1/2 5-1/2 5-3/8 10-3/4 11Shpg. Wt. (w/o Ball Valves) 5-1/8 5-1/8 5 9-3/4 9-5/8Shpg. Wt. (with Ball Valves)6-3/8 6-3/8 6-1/4 12-1/4 12-3/416Customer Service 1-704-841-6000