2 1/2 DERINGER 40G (RP)

Item Number: D-2540G
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$3,251.16
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Size: 2 1/2 inch
  • Weight: 171.0 lb
  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Body Material: 304 Stainless Steel
  • Shutoff Valves: OS&Y Gate Valves
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Features SentryPlus Alert flood sensor technology
  • Approved: AWWA C511-07, NSF/ANSI 372, UL, FM, ASSE 1013, USC

Description

The 2 1/2 inch Ames Deringer 40G Reduced Pressure Zone Backflow Preventer Assembly is engineered to protect potable water systems from non-health hazard pollutants and hazardous contaminants caused by backpressure or backsiphonage. Featuring a durable 304 stainless steel body and in-line serviceable OS&Y gate valves, this unit offers robust performance. It includes dual-action check modules for reliable flow control and tamper-resistant test cocks. A notable feature is the integrated SentryPlus Alert flood sensor, designed to detect and notify personnel of excessive relief valve discharges. Rated for 175 psi maximum working pressure and 33°F to 140°F, it is compliant with AWWA C511-07, NSF/ANSI 372 (Lead Free), UL, FM, ASSE 1013, and USC approvals.

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Connections

  • This backflow preventer assembly features flanged ends that comply with ANSI B16.1 Class 125 standards, ensuring compatibility with corresponding flanged piping systems.
  • The in-line serviceable OS&Y gate valves allow for isolation and maintenance within the system.
  • An add-on sensor connection kit is required to activate the SentryPlus Alert flood sensor's BMS and cellular communication capabilities.
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Additional Details

The 2 1/2 inch Ames Deringer™ 40G Reduced Pressure Zone backflow preventer assembly is designed to prevent non-health hazard pollutants and hazardous contaminants from entering a potable water supply system when backpressure and/or backsiphonage conditions occur.

Key Features

  • Features a flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve.
  • Prewired supervisory switches for enhanced monitoring.
  • Dual-action check module for reliable performance at both low- and high-flow rates.
  • Equipped with tamper-resistant test cocks.
  • In-line serviceable OS&Y gate valves with resilient seating, compliant with AWWA C509.
  • Stainless steel body construction for durability.
  • Stem includes a tamper switch groove.

Design and Function

  • Operates under continuous pressure service.
  • The relief valve operates without sliding seals.
  • Features a poppet action first check for more reliable relief valve closure.
  • The dual-action second check module operates as "poppet style" for low flow and "swing style" for high flow.
  • Can be serviced without special tools.

Specifications

General

  • Product Type: Reduced Pressure Zone Backflow Preventer Assembly
  • Model: Deringer™ 40G
  • Size: 2 1/2 inch
  • Maximum Working Pressure: 175 psi (12 bar)
  • Temperature Range: 33°F - 140°F
  • End Connections: Flanged, 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 (Lead Free)
  • UL Classified
  • FM Approved
  • ASSE 1013
  • USC Approved

FAQs

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

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

What are the key features of the check modules in this assembly?

The assembly features dual-action check modules. The second check module operates as a "poppet style" for low flow and a "swing style" for high flow, while the first check is a poppet action for more reliable relief valve closure.

Does this backflow preventer include a flood detection feature?

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 for BMS and cellular communication to notify personnel.

What type of shutoff valves are used on the Deringer 40G assembly?

It is equipped with in-line serviceable OS&Y (Outside Stem & Yoke) gate valves. These valves are resiliently seated and are AWWA C509, UL Classified, and FM Approved.

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

The maximum working pressure for this unit is 175 psi (12 bar), and it operates effectively within a temperature range of 33°F to 140°F.

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