Check Modules: Patented Dual-action™ for high and low flow
Lead Free: Yes
Approved for Fire Protection, Waterworks, Plumbing, and Irrigation
Description
The Ames Deringer 20G 6 inch double check valve backflow preventer assembly protects potable water systems from non-health hazard pollutants caused by backpressure or backsiphonage. It features a 304 stainless steel housing and inline serviceable OS&Y gate valves with prewired supervisory switches. Patented Dual-action™ check modules ensure reliable performance across low and high flow rates. Approved for fire protection, waterworks, plumbing, and irrigation applications, this assembly operates within a 10 to 175 PSI working pressure range and is Lead Free. Item number D-6020G.
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Connections
This 6 inch Deringer 20G Double Check Valve Assembly features flanged end ANSI B16.1 Class 125 connections. It also includes flexible groove couplings UL/FM between the body and gate valves for ease of installation and maintenance.
This 6 inch Ames Deringer™ 20G double check valve backflow preventer assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions.
It may be installed under continuous pressure service to protect against both backpressure and backsiphonage.
Features
Inline serviceable OS&Y gate valves with prewired supervisory switches
Stainless steel housing
Tamper-resistant test cocks
Patented Dual-action™ check modules for poppet action at low flow and swing action at high flow
Flexible groove coupling UL/FM (between body and gate valves)
Specifications
General
Product Type: Double Check Valve Assembly
Size: 6 inch
Working Pressure: 10 - 175 PSI
Temperature Range: 33°F - 140°F
End Connections: Flanged ANSI B16.1 Class 125
Materials
Valve Housing: 304 Stainless Steel
Valve Cover: 304 Stainless Steel
SOV Disks: EPDM/304SS
SOV Shafts: 304 Stainless Steel
SOV Bearings: Teflon® fluoropolymer/Bronze
Non-wetted Bolts: Grade 8 Zinc Plated
Check Disks: Silicone (NSF)
Wetted Fasteners: 18-8 Stainless Steel
Check Springs: 17-7 Stainless Steel
Check Pins: 17-7/18-8 Stainless Steel
Check Seats: Noryl® Polymer (NSF)
O-rings: Buna-N (NSF)
Certificates & Approvals
AWWA C510-07 Compliant
NSF/ANSI 372: UL Certified
Lead Free (less than 0.25% lead by weight on wetted surfaces)
FM Approved
UL Approved
FAQs
What is the primary purpose of the Deringer™ 20G Double Check Valve Assembly?
The primary purpose is to prevent non-health hazard pollutants from entering the potable water supply system, which can be caused by backpressure and/or backsiphonage conditions.
What are the key features of the check modules in this assembly?
The assembly utilizes patented Dual-action™ check modules. These modules provide poppet action for low flow conditions and swing action for high flow conditions, ensuring effective performance across different flow rates.
What materials are used for the main components of the Deringer™ 20G?
The valve housing and cover are made from 304 Stainless Steel. Key components like check disks are Silicone (NSF), O-rings are Buna-N (NSF), and check seats are Noryl® Polymer (NSF).
What are the connection types for this 6-inch assembly?
This assembly features flanged end ANSI B16.1 Class 125 connections. It also includes flexible groove couplings (UL/FM approved) located between the body and the gate valves.
What is the approved working pressure and temperature range for this backflow preventer?
The Deringer™ 20G is approved for a working pressure range of 10 to 175 PSI. Its temperature range is specified from 33°F to 140°F.
