4 DERINGER 20X (DC)

Item Number: D-4020X
1 1
$5,890.00
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Size: 4 inch
  • Weight: 98.0 lb
  • Housing Material: 304 Stainless Steel
  • Maximum Operating Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Lead Free: Yes (less than 0.25% lead)
  • Check Type: Dual-action (poppet/swing)
  • End Connections: IPS Grooved
  • Integral Shutoff Valves: Yes, with prewired supervisory switches

Description

The 4 inch Ames Deringer 20X Low Head Loss Double Check Valve Assembly is a stainless steel backflow preventer engineered to protect potable water systems from non-health hazard pollutants due to backpressure or backsiphonage. Featuring an all-304 stainless steel housing, integral shutoff valves with prewired supervisory switches, and patented Dual-Action check modules for optimal performance across low and high flow rates, this assembly ensures reliable protection. It offers IPS grooved ends for easy installation and is certified Lead Free, UL listed, and FM approved. With a maximum operating pressure of 175 psi and a temperature range of 33°F to 140°F, it's suitable for fire protection, waterworks, plumbing, and irrigation applications.

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End Connections

  • The 4 inch Deringer™ 20X assembly features IPS grooved ends designed for connection to steel pipe, compliant with AWWA C606 standards.
  • This unit is also compatible with flanged adapters, specifically ANSI B16.1 Class 125, which can be acquired separately for alternative pipe connections.

Approved Applications

  • This backflow preventer is approved for use in Fire Protection systems.
  • It is also suitable for Waterworks, Plumbing, and Irrigation Applications.
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Additional Details

The Ames Deringer™ 20X Low Head Loss Double Check Valve Assembly is a 4 inch stainless steel backflow preventer designed to safeguard potable water systems from non-health hazard pollutants caused by backpressure or backsiphonage conditions.

This assembly features integral butterfly shutoff valves with grooved ends, prewired supervisory switches, and Dual-Action™ check modules for reliable performance across varying flow rates.

Features

  • Oversized checks for extreme performance and lower head loss
  • Integral shutoff valves designed for indoor or outdoor application
  • 100% stainless steel housing
  • Tamper-resistant test cocks
  • Patented Dual-action™ check modules: Poppet action at low flow and Swing action at high flow
  • Silicone elastomer check discs
  • Prewired supervisory (alarm) switches for integral shutoff valves
  • Flanged adapters available for connection flexibility
  • IPS grooved ends for steel pipe connections
  • Serviceable without special tools and approved for both horizontal and vertical applications

Construction

  • Single rigid valve housing constructed entirely of 304 stainless steel
  • Two independent Dual-action check modules and two integral resiliently seated shutoff valves
  • Integral shutoff valves include prewired supervisory tamper switches within a weatherproof actuator housing
  • Checks use replaceable silicone elastomer sealing discs
  • Single full access service port and cover with an in-line replaceable elastomer seal

Operation

  • Operates as a "poppet style" check under low flow conditions
  • Operates as a "swing style" check under high flow conditions
  • Designed for continuous pressure service against backpressure and backsiphonage

Specifications

General

  • Product Type: Double Check Valve Backflow Preventer Assembly
  • Model: Deringer™ 20X
  • Nominal Size: 4 inch
  • Design: Low Head Loss
  • Operation: Dual-Action Check Modules
  • Installation Orientation: Horizontal or Vertical
  • Certifications: AWWA C510-07 Compliant, ANSI/NSF/CAN 61, UL Certified Health Effects, UL Certified to ANSI/NSF/CAN 372, LEAD FREE, FM Approved, USC Approved, ASSE 1015
  • Applications: Fire Protection, Waterworks, Plumbing, Irrigation

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)
  • Lead Content: Less than 0.25% by weight (wetted surface)

Performance Ratings

  • Temperature Range: 33°F - 140°F
  • Working Pressure: 10 - 175 psi
  • Maximum Operating Pressure: 175 psi

Dimensions

  • Length: 23.6 inches (599 mm)
  • Height: 12.0 inches (305 mm)
  • Width: 12.2 inches (310 mm)
  • Weight: 69 lbs (31 kg)

FAQs

What is the primary purpose of the Deringer™ 20X Double Check Valve Assembly?

Its primary purpose is to prevent non-health hazard pollutants from entering the potable water supply system. This protection is vital against conditions caused by backpressure and/or backsiphonage.

What types of end connections does this 4-inch backflow preventer use?

The assembly features IPS grooved ends, which are suitable for steel pipe connections. It can also accommodate flanged adapters, conforming to ANSI B16.1 Class 125, for other pipe types.

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

The Deringer™ 20X can operate with a maximum working pressure of 175 psi. Its temperature range is from 33°F (1°C) to 140°F (60°C).

What does "Dual-action™ check modules" mean?

Dual-action check modules refer to the unique design where the checks operate as a "poppet style" under low flow conditions and transition to a "swing style" under high flow conditions, ensuring consistent performance.

Is the Deringer™ 20X Lead Free?

Yes, the wetted surface of this product contains less than 0.25% of lead by weight, making it compliant with Lead Free standards like ANSI/NSF/CAN 372.

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