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Brand - Deringer
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Valve Housing: 304 Stainless Steel
Weight: 47.0 lb
Maximum Working Pressure: 175 psi
Temperature Range: 33°F - 140°F
Connections: IPS Grooved Ends
Check Modules: Patented Dual-action™
Housing: 100% Stainless Steel
Certifications: AWWA C510-07, ANSI/NSF/CAN 61
Features: Prewired supervisory switches
Description
The 2 1/2 inch Ames Deringer™ 20 Double Check Valve Assembly (SKU: D-2520) is designed to prevent non-health hazard pollutants from entering potable water systems due to backpressure or backsiphonage. This assembly features a durable 100% 304 stainless steel housing, patented Dual-action™ check modules for optimal performance at both low and high flow rates, and integral shutoff valves with IPS grooved ends. Approved for fire protection, waterworks, plumbing, and irrigation applications, it operates within 10-175 psi and 33°F-140°F. Prewired supervisory switches and tamper-resistant test cocks enhance reliability.
The Deringer™ 20 Double Check Valve assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions.
This 2 1/2 inch Ames Deringer™ 20 double check valve backflow preventer assembly features integral Eccentric-Seal™ butterfly shutoff valves, integrated tamper switches, and Dual-Action™ checks for high performance at both low- and high-flow rates. It is suitable for continuous pressure service.
Features
Integral shutoff valves designed for indoor or outdoor application
100% stainless steel housing
Tamper-resistant test cocks
Patented Dual-action™ check modules with poppet action at low flow and swing action at high flow
Silicone elastomer check discs
Prewired supervisory switches
Flange adapters available
IPS grooved ends
Specifications
Valve Housing: 304 Stainless Steel
Valve Cover: 304 Stainless Steel
SOV Disks: EPDM/304SS
SOV Shafts: 304 Stainless Steel
SOV Bearings: PTFE 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)
Pressure - Temperature
Temperature Range: 33°F - 140°F
Working Pressure: 10 - 175 psi
Certificates & Approvals
AWWA C510-07 Compliant
ANSI/NSF/CAN 61
UL Certified Health Effects
UL Certified to ANSI/NSF/CAN 372
LEAD FREE
Approved for Fire Protection, Waterworks, Plumbing, and Irrigation Applications
FAQs
What is the primary function of the Deringer™ 20 Double Check Valve Assembly?
This assembly is designed to prevent non-health hazard pollutants from entering a potable water supply system due to backpressure and/or backsiphonage conditions.
What materials are primarily used in the construction of this backflow preventer?
The valve housing, valve cover, SOV shafts, and check springs are constructed from various grades of stainless steel, including 304 SS and 17-7 SS. Check disks are silicone (NSF), and O-rings are Buna-N (NSF).
What are the operating pressure and temperature limits for this device?
The Deringer™ 20 is rated for a working pressure of 10-175 psi and can operate within a temperature range of 33°F to 140°F.
What type of end connections does the Deringer™ 20 assembly use?
The assembly features IPS grooved ends, which are suitable for steel pipe connections and compatible with AWWA C606 standards. Flange adapters are also available for different installation needs.
What are the key features of the patented Dual-action™ check modules?
The Dual-action™ check modules are designed for optimal performance with a poppet action at low flow conditions and a swing action at high flow conditions, ensuring effective backflow prevention across varying flow rates.
