3 DERINGER 50G GPM

Item Number: D-3050G-GPM
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$4,687.15
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • 3 inch nominal size
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F – 140°F
  • 304 Stainless Steel housing and body
  • Inline serviceable OS&Y gate valves
  • Flood sensor with SentryPlus Alert® technology
  • Includes GPM meter
  • NSF/ANSI 372, UL Certified, Lead Free

Description

The Ames Deringer™ 50G 3 inch reduced pressure detector backflow preventer assembly protects potable water supplies from hazardous contaminants and non-health hazard pollutants due to backpressure and backsiphonage. This Type II assembly features a durable stainless steel body, inline OS&Y gate valves, and dual-action checks for reliable performance across flow rates. It includes a GPM meter for monitoring and a SentryPlus Alert® flood sensor to detect relief valve discharges. Rated for 175 psi working pressure and temperatures from 33°F to 140°F, it is UL Certified, Lead Free, and NSF/ANSI 372 compliant. Item number D-3050G-GPM.

Help Me Connect

Connections

  • The backflow preventer features flanged ends that connect to piping systems conforming to ANSI B16.1 Class 125 standards.
  • This assembly is designed for installation under continuous pressure service.

Sensor Connectivity

  • The integrated flood sensor can be connected to building management systems (BMS) or cellular networks via optional add-on sensor connection kits to enable remote alerts.
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Additional Details

This 3 inch Ames Deringer™ 50G reduced pressure detector backflow preventer assembly is designed to prevent hazardous contaminants and non-health hazard pollutants from entering the potable water supply system.

It protects against both backpressure and backsiphonage conditions and is primarily required on fire sprinkler systems for monitoring unauthorized water usage.

Key Features

  • Features a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • Can send an alert (with add-on sensor connection kit) to notify personnel about potential flooding.
  • Inline serviceable OS&Y gate valves and tamper-resistant test cocks.
  • Durable stainless steel housing and body.
  • True-Seal™ and Dual-Action™ check modules provide high performance at low- and high-flow rates.
  • Patented Dual-Action™ second check module with poppet action at low flow and spring action at high flow.
  • Balanced chamber relief valve requires no sliding seals.
  • Includes a GPM meter.
  • Lead Free® bronze bypass components.
  • Flanged ends ANSI B16.1 Class 125.

Construction Materials

  • Valve Housing: 304 Stainless Steel
  • Valve Cover: 304 Stainless Steel
  • SOV Body: CF8M/304SS
  • SOV Shafts: 304 Stainless Steel
  • Bypass Piping: 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
  • Bypass Components: Lead Free Bronze
  • RV Housing: 304 Stainless Steel
  • Check Springs: 17-7 Stainless Steel
  • Check Pins: 17-7/316 Stainless Steel
  • Check Stems: Noryl Polymer (NSF)
  • O-rings: Buna-N (NSF)
  • Bypass Internals: ABS Polymer (NSF)
  • RV House: Braided Stainless Steel Wire

Specifications

General

  • Product Type: Reduced Pressure Detector Backflow Preventer Assembly
  • Model: Deringer™ 50G Type II
  • Nominal Size: 3 inch
  • Working Pressure: 10 – 175 psi
  • Temperature Range: 33°F – 140°F
  • End Connections: Flanged ANSI B16.1 Class 125
  • Includes: GPM Meter, Flood Sensor

Dimensions

  • Height (Ht): 22.5 inch
  • Length (L): 31.9 inch
  • Width (W): 12.6 inch

Body Materials

  • Valve Housing: 304 Stainless Steel
  • Valve Cover: 304 Stainless Steel
  • SOV Body: CF8M/304SS
  • Bypass Piping: 304 Stainless Steel
  • RV Housing: 304 Stainless Steel

Internal Components

  • Check Disks: Silicone (NSF)
  • Check Stems: Noryl Polymer (NSF)
  • O-rings: Buna-N (NSF)
  • SOV Bearings: PTFE Fluoropolymer/Bronze
  • Bypass Components: Lead Free Bronze
  • RV Spring: 302 Stainless Steel
  • Check Springs: 17-7 Stainless Steel
  • Check Pins: 17-7/316 Stainless Steel
  • Bypass Internals: ABS Polymer (NSF)

Certificates & Approvals

  • AWWA C511-07 Compliant
  • NSF/ANSI 372
  • UL Certified
  • LEAD FREE
  • CSA B64.4 or agency bypass
  • USC Approved
  • UL Classified/FM Approved (Flexible groove coupling)

FAQs

What is the primary purpose of the Ames Deringer™ 50G backflow preventer?

Its primary purpose is to prevent hazardous contaminants and non-health hazard pollutants from entering the potable water supply system due to backpressure or backsiphonage conditions.

What type of shutoff valves does this backflow preventer use?

This assembly is equipped with inline serviceable OS&Y (Outside Stem & Yoke) gate valves, which are resilient seated for reliable operation.

Does this backflow preventer include a feature for flood detection?

Yes, it includes a flood sensor with SentryPlus Alert® technology that detects excessive water discharges from the relief valve, with options for remote notification via add-on kits.

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

The maximum working pressure for this backflow preventer is 175 psi (12 bar), and it is designed to operate within a temperature range of 33°F to 140°F.

What is the function of the Type II bypass and GPM meter?

The Type II bypass is used to monitor unauthorized water usage, primarily in fire sprinkler systems, and the integrated GPM meter provides flow rate measurement.

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