The 3 inch Ames Deringer 30G Double Check Detector Valve Assembly (DCDA-II) is a Type II backflow preventer designed to protect potable water systems from non-health hazard pollutants. It is specifically suited for fire sprinkler systems requiring monitoring of unauthorized water usage, featuring an integrated GPM meter. Key components include a durable 304 stainless steel housing, inline serviceable OS&Y gate valves, and patented Dual-action check modules for reliable performance at various flow rates. This Lead Free assembly has a maximum working pressure of 175 psi and connects via ANSI B16.1 Class 125 flanged ends.
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Connections
This DCDA-II backflow preventer features flanged end connections compliant with ANSI B16.1 Class 125.
It also includes flexible groove couplings UL/FM approved for secure connection between the valve body and the gate valves.
The 3 inch Ames Deringer 30G Double Check Detector Valve Assembly (DCDA-II) is engineered to prevent non-health hazard pollutants from entering a potable water supply system due to backpressure and/or backsiphonage conditions.
This Type II backflow preventer is primarily utilized in fire sprinkler systems where monitoring of unauthorized water usage is required, featuring a GPM bypass meter.
Key Features
Inline serviceable OS&Y gate valves with stainless steel stem and pre-machined groove for supervisory tamper switches
Stainless steel housing
Patented Dual-action check modules offering poppet action at low flow and swing action at high flow for high performance
Lead Free bronze bypass components
Tamper-resistant test cocks
Silicone elastomer check discs
Flanged end ANSI B16.1 Class 125 connections
Flexible groove coupling UL/FM between body and gate valves
Couplings: Flexible groove UL/FM (between body and gate valves)
Materials
Valve Housing: 304 Stainless Steel
Valve Cover: 304 Stainless Steel
SOV Disks: EPDM/304SS
SOV Shafts: 304 Stainless Steel
Bypass Spring: 302 Stainless Steel
SOV Bearings: PTFE/Bronze
Non-wetted Bolts: Grade 8 Zinc Plated
Check Disks: Silicone (NSF)
Wetted Fasteners: 18-8 Stainless Steel
Bypass Components: Lead Free Bronze
Check Springs: 17-7 Stainless Steel
Check Pins: 17-7/18-8 Stainless Steel
Check Seats: Noryl® Polymer (NSF)
O-rings: Buna-N (NSF)
Bypass Internals: ABS Polymer (NSF)
Certificates & Approvals
AWWA: C510-07 Compliant
NSF/ANSI: 372
UL Certified
LEAD FREE
ASSE: 1048
USC Approved
FM Approved
FAQs
What is the primary application of the Deringer 30G DCDA-II?
This backflow preventer is primarily used in fire sprinkler systems to prevent non-health hazard pollutants from entering the potable water supply, especially when monitoring for unauthorized water use is required.
What type of check valves does this assembly use?
It features patented Dual-action check modules that provide poppet action at low flow and swing action at high flow, ensuring high performance across various flow rates.
What kind of bypass meter is included with this model?
The Deringer 30G DCDA-II includes a GPM (Gallons Per Minute) bypass meter, which is used to monitor unauthorized water usage. It can also register in cubic feet.
What are the main connection types for this 3 inch Deringer 30G?
The assembly utilizes flanged end connections compliant with ANSI B16.1 Class 125. Additionally, it has flexible groove couplings (UL/FM approved) that connect the body to the gate valves.
What is the maximum operating pressure for this backflow preventer?
The Deringer 30G Double Check Detector Valve Assembly has a maximum working pressure of 175 psi.
