8 DERINGER 30G GPM

Item Number: D-8030G-GPM
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$9,692.18
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Size: 8 inch
  • Body Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 140°F
  • Features Dual-Action™ Check Modules
  • Includes GPM Bypass Meter
  • Lead Free* Bronze Bypass Components
  • Approved for Horizontal and Vertical Installation

Description

The 8 inch Ames Deringer 30G Double Check Detector Backflow Preventer Assembly with a GPM meter is engineered to safeguard potable water systems from non-health hazard pollutants caused by backpressure or backsiphonage. Featuring a durable 304 stainless steel body, inline serviceable OS&Y gate valves, and patented Dual-action™ check modules, it delivers reliable performance across low and high-flow rates. The integrated GPM meter monitors water usage, making it ideal for fire sprinkler systems and other applications requiring unauthorized water use detection. It operates up to 175 PSI and is Lead Free* compliant. Item number D-8030G-GPM.

Help Me Connect

This 8 inch Ames Deringer 30G Double Check Detector Valve Assembly features grooved end connections, making it compatible with various piping systems using grooved couplings. The OS&Y gate valves are designed for inline serviceability. The unit is approved for both horizontal and vertical installation.

  • End Connections: Flange ANSI B16.1 Class 125
  • Flexible Groove Coupling: UL/FM between body and gate valves
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Additional Details

The 8 inch Ames Deringer™ 30G Double Check Detector Valve Assembly (DCDA-II) is designed to prevent non-health hazard pollutants from entering a potable water supply system due to backpressure and backsiphonage. This assembly is primarily used on fire sprinkler systems to monitor unauthorized water usage.

Key Features

  • Features an 8 inch stainless steel housing for durability.
  • Incorporates inline serviceable OS&Y gate valves for easy maintenance.
  • Equipped with patented Dual-action™ check modules, offering poppet action for low flow and swing action for high flow.
  • Includes a tamper switch groove on the stem and tamper-resistant test cocks.
  • Lead Free* bronze bypass components and a GPM bypass meter allow for monitoring water usage.
  • Utilizes silicone elastomer check discs and Buna-N (NSF) O-rings for reliable sealing.
  • Approved for both horizontal and vertical applications.

Specifications

General

  • Size: 8 inch
  • Model: 30G
  • Bypass Meter: GPM (Gallons Per Minute)
  • Applications: Fire Protection, Waterworks, Plumbing, Irrigation

Pressure & Temperature

  • Maximum Working Pressure: 175 PSI (12 bar)
  • Temperature Range: 33°F - 140°F

Materials

  • Valve Housing: 304 Stainless Steel
  • Valve Cover: 304 Stainless Steel
  • SOV Disks: EPDM/304SS
  • SOV Shafts: 304 Stainless Steel
  • Bypass Spring: 302 Stainless Steel
  • SOV Bearings: PTFE/Bronze
  • Non-wetted Bolts: Grade 8 Zinc Plated
  • Check Disks: Silicone (NSF)
  • Wetted Fasteners: 18-8 Stainless Steel
  • Bypass Components: Lead Free* Bronze
  • Check Springs: 17-7 Stainless Steel
  • Check Pins: 17-7/18-8 Stainless Steel
  • Check Seats: Noryl® Polymer (NSF)
  • O-rings: Buna-N (NSF)
  • Bypass Internals: ABS Polymer (NSF)

Dimensions & Weight

  • Overall Height (Ht+Hb): 46.2 inches (1173 mm)
  • Length (L): 44.8 inches (1138 mm)
  • Width (W): 14.6 inches (371 mm)
  • Approximate Weight: 452 lbs (205 kg)

Certificates & Approvals

  • AWWA C510-07 Compliant
  • NSF/ANSI 372
  • UL Certified
  • FM Approved
  • ASSE 1048
  • USC Approved
  • Lead Free*

FAQs

What is the primary purpose of the Deringer 30G Double Check Detector Valve Assembly?

Its primary purpose is to prevent non-health hazard pollutants from contaminating the potable water supply due to backpressure or backsiphonage, especially in fire sprinkler systems where monitoring unauthorized water usage is required.

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

The Deringer 30G is rated for a maximum working pressure of 175 PSI (12 bar) and operates efficiently within a temperature range of 33°F to 140°F.

What type of end connections does the 8 inch Deringer 30G assembly have?

This assembly features Flange ANSI B16.1 Class 125 end connections and is also designed for flexible groove coupling (UL/FM approved) between the body and gate valves.

What does the "GPM Meter" on this assembly indicate?

The GPM (Gallons Per Minute) meter in the bypass assembly is used to monitor and register water usage, which is particularly useful for detecting unauthorized water consumption in systems like fire sprinkler lines.

What materials are used for the main valve housing and internal components?

The valve housing and cover are constructed from 304 Stainless Steel. Key internal components like check disks are Silicone (NSF), check seats are Noryl® Polymer (NSF), and O-rings are Buna-N (NSF). The bypass components are Lead Free* Bronze.

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