6 DERINGER 20 (DC)

Item Number: D-6020
1 1
$4,572.25
Limited Stock (2)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Deringer
  • Size: 6 inch
  • Weight: 134.0 lb
  • Housing Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Dual-Action™ Check Modules
  • Prewired Supervisory Switches Included
  • IPS Grooved Ends
  • AWWA C510-07 Compliant

Description

The 6-inch Ames Deringer 20 Double Check Valve Assembly (D-6020) is designed to protect potable water systems from non-health hazard pollutants due to backpressure or backsiphonage. Constructed with 100% 304 stainless steel, it features integral shutoff valves, tamper-resistant test cocks, and patented Dual-Action™ check modules for reliable performance at all flow rates. With a maximum working pressure of 175 PSI and IPS grooved ends, this lead-free compliant assembly is approved for fire protection, waterworks, plumbing, and irrigation applications, ensuring robust and versatile protection.
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Additional Details

The Ames Deringer™ 20 Double Check Valve Assembly is a 6 inch stainless steel backflow preventer designed to safeguard potable water supply systems from non-health hazard pollutants. It effectively prevents contamination caused by backpressure and backsiphonage conditions.

This assembly features integral Eccentric-Seal™ butterfly shutoff valves for a short lay length and includes integrated tamper switches. Its patented Dual-Action™ check modules ensure high performance across both low and high flow rates. It is suitable for continuous pressure service and can be installed in either horizontal or vertical orientations.

Features

  • Designed for indoor or outdoor application with integral shutoff valves
  • Constructed with 100% 304 stainless steel housing for durability
  • Includes tamper-resistant test cocks for secure operation
  • Patented Dual-action™ check modules provide poppet action at low flow and swing action at high flow
  • Equipped with silicone elastomer check discs for reliable sealing
  • Features prewired supervisory switches for enhanced monitoring
  • IPS grooved ends for straightforward connection
  • Can be serviced without requiring special tools

Lead-Free Compliance

  • The wetted surface of this product, when contacted by consumable water, contains less than 0.25% lead by weight.

Specifications

  • Size: 6 inch
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Weight: 141 lbs
  • Length: 30.7 inches
  • Height: 15.6 inches
  • Depth: 13.8 inches

Materials

  • 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)

Certificates & Approvals

  • AWWA C510-07 Compliant
  • ANSI/NSF/CAN 61 Certified
  • UL Certified Health Effects
  • UL Certified to ANSI/NSF/CAN 372
  • Approved for Fire Protection, Waterworks, Plumbing, and Irrigation Applications
  • LEAD FREE

FAQs

What is the primary function of the 6 inch Deringer 20 Double Check Valve Assembly?

Its primary function is to prevent non-health hazard pollutants from entering the potable water supply system due to backpressure and/or backsiphonage conditions.

What type of material is the valve housing made from?

The valve housing is constructed entirely from 100% 304 stainless steel, offering excellent durability and corrosion resistance.

What is the maximum operating pressure and temperature range for this assembly?

The Deringer 20 can operate with a maximum working pressure of 175 psi and within a temperature range of 33°F to 140°F.

Does this backflow preventer come with prewired supervisory switches?

Yes, it includes prewired supervisory tamper switches contained within a weatherproof actuator housing, approved for both indoor and outdoor use.

What kind of connections does the 6 inch Deringer 20 assembly use?

This assembly features IPS grooved ends. It is also compatible with AWWA C606 connections and can use flange adapters that meet ANSI B16.1 Class 125 standards.

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