3 DERINGER 40G (RP)

Item Number: D-3040G
1 1
$3,416.43
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Size: 3 inch
  • Weight: 175.0 lb
  • Body Material: Stainless Steel (304)
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • End Connections: ANSI B16.1 Class 125 Flange
  • Features SentryPlus Alert® flood sensor technology
  • Includes in-line serviceable OS&Y gate valves
  • UL Classified, FM Approved, and ASSE 1013 certified

Description

The Ames 3 inch Deringer 40G Reduced Pressure Zone Backflow Preventer is engineered to safeguard potable water systems from non-health hazard pollutants and hazardous contaminants. This lead-free assembly features a durable stainless steel body, resiliently seated OS&Y shutoff valves, and advanced dual-action check modules for reliable performance across various flow rates. It integrates a SentryPlus Alert® flood sensor for detecting excessive relief valve discharges. Approved for fire protection, waterworks, plumbing, and irrigation applications, this backflow preventer offers robust protection against backpressure and backsiphonage, ensuring water system integrity. Item number D-3040G.

Help Me Connect

System Connections

  • The Ames Deringer 40G Reduced Pressure Zone Backflow Preventer connects to a piping system via its 3 inch ANSI B16.1 Class 125 flanged ends.

Internal Assembly Connections

  • The central stainless steel body and the OS&Y gate valves are connected internally using flexible groove couplings, which are UL Classified and FM Approved. This design allows for easier serviceability of components within the assembly.
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Additional Details

This 3 inch Ames Deringer™ 40G reduced pressure zone backflow preventer assembly prevents non-health hazard pollutants and hazardous contaminants from entering a potable water supply system due to backpressure and/or backsiphonage conditions. It is approved for fire protection, waterworks, plumbing, and irrigation applications and may be installed under continuous pressure service.

Key Features

  • Features a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. When activated through an add-on sensor connection kit, the flood sensor can send an alert to notify personnel about potential flooding.
  • Includes in-line serviceable OS&Y gate valves that are resiliently seated.
  • Equipped with a stainless steel housing for durability.
  • Features a patented Dual-action™ second check module which operates as a poppet style check under low flow and a swing style check under high flow.
  • A poppet action first check provides more reliable relief valve closure.
  • The stem includes a pre-machined groove for tamper switch installation, and assembly test cocks are tamper-resistant.
  • Designed with a balanced chamber Relief Valve which operates without sliding seals.
  • Uses silicone elastomer check discs.
  • Features flexible groove coupling (UL Classified/FM Approved) between the body and gate valves for ease of serviceability.

Specifications

  • Product Type: Reduced Pressure Zone Assembly
  • Model: 40G
  • Nominal Size: 3 inch
  • Working Pressure: 10 - 175 psi
  • Temperature Range: 33°F - 140°F
  • End Connection: Flange - ANSI B16.1 Class 125

Materials

  • Valve Housing: 304 Stainless Steel
  • Valve Cover: 304 Stainless Steel
  • SOV Disks: EPDM/304SS
  • SOV Shafts: 304 Stainless Steel
  • RV Spring: 302 Stainless Steel
  • SOV Bearings: PTFE Fluoropolymer/Bronze
  • Non-wetted Bolts: Grade 8 Zinc Plated
  • Check Disks: Silicone (NSF)
  • Wetted Fasteners: 18-8 Stainless Steel
  • RV Housing: 304 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)
  • RV House: Braided Stainless Steel Wire

Certificates & Approvals

  • AWWA C511-07 Compliant
  • NSF/ANSI 372
  • UL Certified
  • LEAD FREE (contacted by consumable water contains less than 0.25% of lead by weight)
  • ASSE 1013
  • USC Approved
  • FM Approved

FAQs

What is the primary function of the Ames Deringer 40G backflow preventer?

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

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

This backflow preventer has a maximum operating pressure of 175 psi and an operating temperature range of 33°F to 140°F.

What type of end connections does the 3 inch Deringer 40G use?

The assembly features flanged end connections, compliant with ANSI B16.1 Class 125 standards, for connection to the main piping system.

Does this backflow preventer include a flood sensor?

Yes, it includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. An add-on sensor connection kit is available to enable alerts.

Is the Ames Deringer 40G suitable for fire protection applications?

Yes, the Ames Deringer 40G is approved for Fire Protection, Waterworks, Plumbing, and Irrigation Applications, making it suitable for various continuous pressure services.

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