8 DERINGER 20 (DC)

Item Number: D-8020
1 1
$8,561.99
Limited Stock (1)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Deringer
  • Valve Size: 8 inch
  • Weight: 151.0 lb
  • Housing Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • End Connections: IPS Grooved
  • Integral Shutoff Valves: Yes
  • Dual-action Check Modules: Yes
  • Approved for horizontal and vertical installation

Description

The 8 inch Deringer 20 Double Check Valve Assembly is a stainless steel backflow preventer designed to safeguard potable water systems from non-health hazard pollutants. Featuring integral butterfly shutoff valves and patented Dual-action™ check modules, it provides reliable protection against backpressure and backsiphonage in both low and high flow conditions. Constructed with a 304 stainless steel housing, it offers a maximum working pressure of 175 psi and operates in temperatures from 33°F to 140°F. The unit is approved for both horizontal and vertical installations, utilizing IPS grooved ends for versatile connection.

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Connections

  • The 8 inch Deringer 20 Double Check Valve Assembly features IPS grooved ends suitable for connection to steel pipe in accordance with AWWA C606.
  • Flange adapters are available for connections conforming to ANSI B16.1 Class 125 (these ship unassembled and are not included with the standard unit).
  • This assembly is approved for both horizontal and vertical installation.
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Additional Details

The 8 inch 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. It is approved for both horizontal and vertical installations.

Features

  • Features integral shutoff valves for indoor or outdoor application, contributing to a shorter lay length and lightweight construction.
  • Constructed with a 100% stainless steel housing for durability.
  • Equipped with tamper-resistant test cocks.
  • Incorporates patented Dual-action™ check modules, providing poppet action at low flow and swing action at high flow.
  • Includes silicone elastomer check discs.
  • Prewired supervisory switches for enhanced monitoring.
  • Offers IPS grooved ends for easy connection.
  • Designed for continuous pressure service.

Design & Construction

  • This assembly utilizes two independent Dual-action check modules and two integral resiliently seated shut-off valves, all contained within a single rigid valve housing.
  • The integral shutoff valves include pre-wired supervisory tamper switches housed within a weatherproof actuator housing.
  • Dual-action check modules feature replaceable silicone elastomer sealing discs.
  • A single full access service port and cover with an in-line replaceable elastomer seal allows for servicing without special tools.

Specifications

  • Valve Size: 8 inch
  • Housing Material: 304 Stainless Steel
  • Valve Cover Material: 304 Stainless Steel
  • SOV Disks Material: EPDM/304SS
  • SOV Shafts Material: 304 Stainless Steel
  • SOV Bearings Material: PTFE Fluoropolymer/Bronze
  • Non-wetted Bolts Material: Grade 8 Zinc Plated
  • Check Disks Material: Silicone (NSF)
  • Wetted Fasteners Material: 18-8 Stainless Steel
  • Check Springs Material: 17-7 Stainless Steel
  • Check Pins Material: 17-7/18-8 Stainless Steel
  • Check Seats Material: Noryl® Polymer (NSF)
  • O-rings Material: Buna-N (NSF)
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • End Connections: IPS Grooved
  • Orientation: Horizontal or Vertical

Dimensions & Weight

  • Overall Length (L): 30.7 inches (780 mm)
  • Height to Centerline (Ht): 10.4 inches (264 mm)
  • Bottom to Centerline (Hb): 5.4 inches (137 mm)
  • Valve Cover Height (H): 15.8 inches (401 mm)
  • Width (W): 13.8 inches (351 mm)
  • Weight: 141 lbs (64 kg)

Certificates & Approvals

  • AWWA C510-07 Compliant
  • ANSI/NSF/CAN 61
  • UL Certified Health Effects
  • UL Certified to ANSI/NSF/CAN 372
  • LEAD FREE
  • cULus Classified WATER QUALITY (ANSI/NSF/CAN 61 & 372)
  • FM Approved
  • USC Approved ASSE 1015

FAQs

What types of backflow conditions does the Deringer 20 prevent?

The Deringer 20 Double Check Valve Assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system due to both backpressure and backsiphonage conditions.

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

This assembly has a maximum working pressure of 175 psi and is designed to operate within a temperature range of 33°F to 140°F.

What materials are used in the construction of the Deringer 20?

The valve housing and cover are constructed from 304 stainless steel. Check disks are silicone (NSF), and O-rings are Buna-N (NSF), ensuring durability and potable water safety.

Can this backflow preventer be installed in any orientation?

Yes, the Deringer 20 Double Check Valve Assembly is approved for installation in both horizontal and vertical orientations, offering flexibility for various piping configurations.

What type of end connections does the 8 inch Deringer 20 have?

The 8 inch Deringer 20 assembly comes with IPS grooved ends for steel pipe connections, compliant with AWWA C606. Flange adapters conforming to ANSI B16.1 Class 125 are also available separately.

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