4 DERINGER 20 (DC)

Item Number: D-4020
1 1
$5,100.00
Limited Stock (7)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Deringer
  • Product Type: Double Check Valve Assembly
  • Weight: 48.0 lb
  • Nominal Size: 4 inch
  • Housing Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Integral shutoff valves for indoor/outdoor application
  • Patented Dual-action™ check modules for high and low flow
  • LEAD FREE certified

Description

The 4 inch AMES Deringer 20 Double Check Valve Assembly (SKU: D-4020) is a LEAD FREE backflow preventer designed to safeguard potable water systems from non-health hazard pollutants due to backpressure or backsiphonage. Constructed with a 304 stainless steel housing, this assembly offers superior durability and corrosion resistance. It features patented Dual-action™ check modules for reliable performance across low and high flow rates, integral butterfly shutoff valves, and prewired supervisory switches. Rated for continuous pressure service up to 175 psi and a temperature range of 33°F to 140°F, it is approved for fire protection, waterworks, plumbing, and irrigation applications.

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Connections

  • This 4 inch Deringer 20 Double Check Valve Assembly features IPS grooved ends for connection to steel pipe, compliant with AWWA C606.
  • The assembly is also compatible with flange adapters meeting ANSI B16.1 Class 125 specifications, which can be purchased separately.

The integral shutoff valves are designed for both horizontal and vertical installations.

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Additional Details

The 4 inch AMES Deringer™ 20 Double Check Valve assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system due to backpressure and/or backsiphonage conditions.

This stainless steel backflow preventer is suitable for continuous pressure service and features integral butterfly shutoff valves with prewired supervisory switches.

Key Features

  • Integral shutoff valves designed for indoor or outdoor application
  • Constructed with 100% stainless steel housing
  • Tamper-resistant test cocks for security
  • Patented Dual-action™ check modules provide poppet action at low flow and swing action at high flow
  • Utilizes silicone elastomer check discs
  • Includes prewired supervisory switches
  • Available with flange adapters and comes with IPS grooved ends
  • Designed for continuous pressure service

Specifications

  • Product Type: Double Check Valve Assembly
  • Nominal Size: 4 inch
  • Housing Material: 304 Stainless Steel
  • Valve Cover Material: 304 Stainless Steel
  • SOV Disk Material: EPDM/304SS
  • SOV Shaft Material: 304 Stainless Steel
  • SOV Bearings Material: PTFE Fluoropolymer/Bronze
  • Non-Wetted Bolts Material: Grade 8 Zinc Plated
  • Check Discs 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)

Performance Data

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

Certificates & Approvals

  • Approved for Fire Protection, Waterworks, Plumbing, and Irrigation Applications
  • AWWA C510-07 Compliant
  • ANSI/NSF/CAN 61
  • UL Certified Health Effects
  • UL Certified to ANSI/NSF/CAN 372
  • LEAD FREE (less than 0.25% of lead by weight)

FAQs

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

Its primary purpose is to prevent non-health hazard pollutants from entering the potable water supply system due to backpressure or backsiphonage conditions. It ensures water safety in various applications.

What is the maximum working pressure and temperature range for this backflow preventer?

This assembly has a maximum working pressure of 175 psi (pounds per square inch) and can operate within a temperature range of 33°F to 140°F.

What material is the Deringer 20 housing made from?

The valve housing is constructed entirely of 304 Stainless Steel, providing excellent durability and corrosion resistance for long-term use.

Are there any specific certifications or approvals for this product?

Yes, it is AWWA C510-07 Compliant, ANSI/NSF/CAN 61, UL Certified for Health Effects, and UL Certified to ANSI/NSF/CAN 372. It is also LEAD FREE certified.

What type of end connections does this backflow preventer use?

The Deringer 20 features IPS grooved ends for steel pipe connections (AWWA C606). It is also compatible with flange adapters that meet ANSI B16.1 Class 125 standards.

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