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BACKFLOW PREVENTERS

BACKFLOW PREVENTERS
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BACKFLOW PREVENTERS MADE IN THE USA

2 Customer Service 1-704-841-6000 TABLE OF CONTENTS Ordering Products Model Code Size Page Selection Guide 3 Double Check Valve DC-4A 4A-100 1/2”-2” 4 Double Check Valve DC-40 40-100 3/4”-2” 5 Double Check Valve DC-4A (LBF) 4A-100 2-1/2”-12” 6-7 Double Check Valve DC-4An 4An-100 2-1/2”-12” 8-9 Double Check Valve Detector Assembly DCDA-4A 4A-600 2-1/2”-12” 10-11 Double Check Valve Detector Assembly DCDA-4An 4An-600 2-1/2”-12” 12-13 Double Check Valve DC-4S 4S-100 1/2”, 10” 14 & 16 Double Check Valve DC-4SG 4SG-100 2-1/2”-8” 15 Double Check Detector Assembly DCDA-4SG 4SG-600 2-1/2”-8” 17...

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Backflow Preventers SELECTION GUIDE 3 www.apollovalves.com * Limited back pressure to 10’ head APPLICATION * * * TYPE OF DEVICE SERIES BACK BACK CONTINUOUS LOW HIGH PAGE SIPHONAGE PRESSURE PRESSURE HAZARD HAZARD NO. DC-4A 4,6 DC-40 5 DOUBLE CHECK VALVE DC-4An 8 DC-4S 14,16 DC4SG 15 DCDA-4A 10 DOUBLE CHECK DCDA-4An 12 DETECTOR ASSEMBLY DCDA-4SG 17 DCDA-4S 18 REDUCED PRESSURE RP-4A 19,24 PRINCIPLE RP-40 20,22,32-33 REDUCED PRESSURE RP-40-n 21 PRINCIPLE (n & Z Flow) RP-40-Z 21 RP-4An 26 REDUCED PRESSURE RP-40-S 23 PRINCIPLE (Stn. Steel) RPDA-4A 28 REDUCED PRESSURE RPDA-4An 30 DETECTOR ASSEMBLY...

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4 Double Check Valve Backflow Preventers Customer Service 1-704-841-6000 TOP ENTRY DOUBLE CHECK VALVE ASSEMBLY The Apollo MODEL DC4A Double Check Valves are designed to prevent contamination of the potable water supply due to back-siphonage or backpressure from substances that are objectionable, but non-health hazards. The modular check valve cartridges have replaceable seats and reversible silicone seat discs. Apollo ball valve shut-offs with stainless steel handles and nuts are standard. OPERATION During normal flow conditions, the two check valves are held off their seats, supplying...

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5 www.apollovalves.com Double Check Valve Backflow Preventers TOP ENTRY DOUBLE CHECK VALVE ASSEMBLY The Apollo DC-40 Series Top Entry Double Check Valve Assembly is designed to protect against backflow from a cross-connection of non-health hazard pollutant. Within the assembly are two mechanically independent, spring-loaded poppet type check valves set in an integral cast bronze body. Both check valves are designed at an inclined angle upward from horizontal centerline of the assembly, and all test cocks are mounted at the top to assure easy access during repair and maintenance when unit is...

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Double Check Valve Backflow Preventers 6 Customer Service 1-704-841-6000 DC-4A Series Sizes 2-1/2"-12” MATERIALS Body (2-1/2”-8”) Stainless Steel Body (10 & 12”) FDA Epoxy Coated Ductile Iron Covers (2-1/2”-6”) Glass Filled PPO/SS Covers (8”) Stainless Steel Covers(10 & 12”) FDA Epoxy Coated Ductile Iron Relief Valve Bronze Check Valves Bronze/Glass-filled PPO/SS Springs Stainless Steel Seat Discs Chloramine-resistant Silicone DOUBLE CHECK VALVE ASSEMBLY The Apollo® MODEL DC-4A Double Check Valves are designed to prevent contamination of the potable water supply due to back-siphonage or...

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DC-4An Series n STYLE DOUBLE CHECK VALVE ASSEMBLY The Apollo® MODEL DC-4An Double Check Valves are designed to prevent contamination of the potable water supply due to back-siphonage or backpressure from substances that are objectionable, but non-health hazards. The TriForce™ center stem guided check valves feature replaceable and reversible silicone seat discs. The normally vertical up/vertical down oriented body incorporates an internal swivel connection providing the ability to pivot the second check. The n style flow body is stainless steel from 2-1/2”-8” and FDA epoxy coated ductile...

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Double Check Valve Backflow Preventers 10 Customer Service 1-704-841-6000 DCDA-4A Series Sizes 2-1/2"-12” MATERIALS Body (2-1/2”-8”) Stainless Steel Body (10 & 12”) FDA Epoxy Coated Ductile Iron Covers (2-1/2”-6”) Glass Filled PPO/SS Covers (8”) Stainless Steel Covers(10 & 12”) FDA Epoxy Coated Ductile Iron Relief Valve Bronze Check Valves Bronze/Glass-filled PPO/SS Springs Stainless Steel Seat Discs Chloramine-resistant Silicone DCDA-4A DOUBLE CHECK DETECTOR ASSEMBLY The Apollo® MODEL DCDA-4A Double Check Detector Assembly is designed to prevent contamination of the potable water supply...

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Double Check Valve Backflow Preventers 12 Customer Service 1-704-841-6000 DCDA-4An Series n STYLE DOUBLE CHECK VALVE ASSEMBLY The Apollo® MODEL DC-4An Double Check Valves are designed to prevent contamination of the potable water supply due to back-siphonage or backpressure from substances that are objectionable, but non-health hazards. The TriForce™ center stem guided check valves feature replaceable and reversible silicone seat discs. The by-pass assembly serves to measure water use of up to 2 GPM. The normally vertical up/vertical down oriented body incorporates an internal swivel...

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14 Customer Service 1-704-841-6000 DC-4S Series (Previously Model DC) TOP ENTRY DOUBLE CHECK VALVE ASSEMBLY The Apollo DC-4S Top Entry Double Check Valve Backflow Preventer is designed to prevent backflow by either back-pressure or back-siphonage from a cross-connection between potable water lines and substances that are objectionable, but not a health hazard. It is an economical device that is easily repaired in the line. The device consists of two independently acting, springloaded poppet type cartridge check valves in an integral cast bronze body. Four test cocks and two shut-off valves...

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Double Check Valve Backflow Preventers www.apollovalves.com 15 DC-4SG Series Sizes 2-1/2”, 3", 4", 6", 8" DC-4SG SERIES DOUBLE CHECK VALVE ASSEMBLY The Apollo® DC-4SG Series Double Check Valve is designed to prevent contamination of the potable water supply due to back-siphonage or backpressure from substances that are non-health hazards. The modular check valves have replaceable seats and reversible EPDM seat discs. Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. FEATURES • Lightweight • Short lay length • Low pressure...

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