2 1/2 DERINGER 30G GPM

Item Number: D-2530G-GPM
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$3,416.43
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Product Type: Double Check Detector Backflow Preventer Assembly
  • Nominal Size: 2 1/2 inch
  • Valve Housing: 304 Stainless Steel
  • Bypass Meter: GPM (Gallons Per Minute)
  • Shutoff Valves: Inline serviceable OS&Y gate valves
  • Check Modules: Patented Dual-action™ for low and high flow
  • Maximum Working Pressure: 175 psi
  • Approved for: Fire Protection, Waterworks, Plumbing, Irrigation

Description

The Ames Deringer™ 30G 2 1/2 inch Double Check Detector Backflow Preventer Assembly (DCDA-II) safeguards potable water systems from non-health hazard pollutants caused by backpressure or backsiphonage. Featuring a durable 304 stainless steel housing and inline serviceable OS&Y gate valves, it is equipped with patented Dual-action™ check modules for reliable performance at both low and high flow rates. This Lead Free* assembly includes a GPM bypass meter for monitoring water usage, making it ideal for fire sprinkler systems, waterworks, plumbing, and irrigation applications. It operates up to 175 psi and withstands temperatures from 33°F to 140°F. Item number D-2530G-GPM.

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Connections

  • This backflow preventer assembly features flanged end connections compliant with ANSI B16.1 Class 125 standards.
  • It includes flexible groove couplings UL/FM approved for secure attachment between the main body and the gate valves.
  • The assembly is designed for versatile installation, approved for both horizontal and vertical applications.
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Additional Details

The 2 1/2 inch Ames Deringer™ 30G Double Check Detector Backflow Preventer Assembly (DCDA-II) is designed to prevent non-health hazard pollutants from entering a potable water supply system due to backpressure and/or backsiphonage conditions. This assembly is primarily required on fire sprinkler systems for monitoring unauthorized water usage and is approved for fire protection, waterworks, plumbing, and irrigation applications.

Key Features

  • Features a stainless steel housing for durability.
  • Incorporates inline serviceable OS&Y gate valves (Outside Yoke and Stem) with pre-machined grooves for supervisory tamper switches.
  • Patented Dual-action™ check modules ensure high performance, operating as "poppet style" at low flow and "swing style" at high flow, utilizing replaceable silicone elastomer sealing discs.
  • Equipped with a Lead Free* bronze bypass assembly that includes a GPM bypass meter for monitoring unauthorized water usage, a single check valve, and tamper-resistant test cocks.
  • Tamper-resistant test cocks are handle-less and operate via a tamper resistant actuator.
  • Designed for continuous pressure service and can be installed for both horizontal and vertical applications.
  • Flanged end ANSI B16.1 Class 125 connections with flexible groove coupling between the body and gate valves.

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Specifications

  • Product Type: Double Check Detector Backflow Preventer Assembly
  • Model: Deringer™ 30G
  • Nominal Size: 2 1/2 inch
  • Bypass Meter: GPM

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)

Performance & Operating Conditions

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

Dimensions & Weight (Approximate)

  • Height (Ht): 19.0 inches (483 mm)
  • Height to Bypass (Hb): 3.6 inches (92 mm)
  • Length (L): 31.9 inches (810 mm)
  • Overall Height (Ht+Hb): 22.6 inches (574 mm)
  • Width (W): 11.0 inches (279 mm)
  • Weight: 122 lbs (55 kg)

Certificates & Approvals

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

FAQs

What is the primary function of the Ames Deringer™ 30G backflow preventer?

Its primary function is to prevent non-health hazard pollutants from entering a potable water supply system due to backpressure or backsiphonage, especially in fire sprinkler systems where monitoring unauthorized water use is required.

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

The maximum operating pressure is 175 psi, and it can withstand temperatures ranging from 33°F to 140°F.

What type of meter is included with the bypass assembly?

The bypass assembly includes a GPM (Gallons Per Minute) meter, which is used to monitor unauthorized water usage, particularly in fire sprinkler systems.

What material is the main valve housing made from?

The main valve housing, along with the valve cover and SOV shafts, is constructed from 304 Stainless Steel for durability and corrosion resistance.

What type of end connections does this backflow preventer use?

This assembly features flanged end connections that comply with ANSI B16.1 Class 125 standards, and it includes flexible groove couplings between the body and gate valves.

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