2 1/2 DERINGER 20G (DC)

Item Number: D-2520G
1 1
$2,793.83
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Assembly Size: 2 1/2 inch
  • Weight: 167.0 lb
  • Body Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F to 140°F
  • Dual-Action™ check modules for low and high flow
  • Features OS&Y resilient seated gate valves
  • Connections: ANSI B16.1 Class 125 Flanged End
  • Lead Free compliant: Wetted surfaces <0.25% lead

Description

The Ames Deringer 20G Double Check Valve Assembly, 2 1/2 inch, prevents non-health hazard pollutants from potable water systems caused by backpressure or backsiphonage. Constructed with a 304 stainless steel body and patented Dual-Action™ check modules, it ensures reliable performance at both low and high flow rates. This Lead Free assembly features inline serviceable OS&Y gate valves, tamper-resistant test cocks, and flanged end connections. Rated for 175 PSI maximum working pressure and temperatures from 33°F to 140°F, it is approved for fire protection, waterworks, plumbing, and irrigation applications. The Deringer 20G is UL Listed, FM Approved, and ASSE 1015 compliant, ensuring high quality and safety. Item number D-2520G.

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Connections and Installation

This 2 1/2 inch Deringer 20G Double Check Valve Assembly features flanged end connections compliant with ANSI B16.1 Class 125 standards. It includes flexible groove couplings between the body and gate valves, which are UL/FM listed for reliable assembly. The unit is designed for installation in both horizontal and vertical orientations, offering versatility for various system layouts.

  • Connects to matching ANSI B16.1 Class 125 flanged pipe systems.
  • Can be installed in horizontal or vertical applications.
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Additional Details

This 2 1/2 inch Ames Deringer™ 20G Double Check Valve Assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions.

The Deringer 20G is approved for Fire Protection, Waterworks, Plumbing, and Irrigation Applications. It features a durable stainless steel body and patented Dual-Action™ check modules for high performance at low and high flow rates, suitable for continuous pressure service.

Features

  • Inline serviceable OS&Y gate valves: Resiliently seated and inline shutoff valves with stainless steel stems, including a pre-machined groove for supervisory tamper switch installation.
  • Stainless steel housing: Ensures durability and long-term reliability.
  • Dual-Action™ check modules: Patented design offers poppet action for low flow and swing action for high flow.
  • Silicone elastomer check discs: Provides reliable sealing performance.
  • Tamper-resistant test cocks: Handle-less design with a tamper resistant actuator.
  • Flanged end connections: Compliant with ANSI B16.1 Class 125 for secure installation.
  • Flexible groove coupling: UL/FM listed, connecting the body and gate valves.
  • This product's wetted surfaces, contacted by consumable water, contain less than 0.25% lead by weight, meeting Lead Free requirements.

Specifications

  • Assembly Size: 2 1/2 inch
  • Model: Deringer™ 20G
  • Valve Housing Material: 304 Stainless Steel
  • Valve Cover Material: 304 Stainless Steel
  • SOV Disks Material: EPDM/304SS
  • SOV Shaft Material: 304 Stainless Steel
  • SOV Bearings Material: Teflon® fluoropolymer/Bronze
  • Non-wetted Bolts Material: Grade 8 Zinc Plated
  • Check Disks Material: Silicone (NSF)
  • Wetted Fasteners Material: 18-8 Stainless Steel
  • Check Springs Material: 17-7 Stainless Steel
  • Check Pins Material: 17-7/18-8 Stainless Steel
  • Check Seats Material: Noryl® Polymer (NSF)
  • O-rings Material: Buna-N (NSF)

Performance

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

Dimensions (Approximate for 2 1/2 inch)

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

Connections

  • End Connections: Flanged
  • Flange Standard: ANSI B16.1 Class 125

Certificates & Approvals

  • AWWA: C510-07 Compliant
  • NSF/ANSI: 372
  • UL Certified: Yes
  • FM Approved: Yes
  • ASSE: 1015
  • USC Approved: Yes
  • Lead Free: Yes (Wetted surface contains <0.25% lead)

FAQs

What is the primary function of the Deringer 20G Double Check Valve Assembly?

The Deringer 20G is designed to prevent non-health hazard pollutants from entering the potable water supply system, protecting against contamination caused by backpressure and backsiphonage conditions.

What material is the valve housing made from?

The valve housing and valve cover of the Deringer 20G Double Check Valve Assembly are constructed from 304 Stainless Steel for durability and corrosion resistance in various applications.

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

The Deringer 20G utilizes patented Dual-Action™ check modules that operate as a poppet style for low flow and a swing style for high flow, ensuring comprehensive protection. They include replaceable silicone elastomer sealing discs for reliability.

What is the maximum working pressure for the 2 1/2 inch Deringer 20G?

The 2 1/2 inch Deringer 20G Double Check Valve Assembly has a maximum working pressure rating of 175 PSI (12 bar) and operates within a temperature range of 33°F to 140°F.

What type of end connections does this backflow preventer have?

This Deringer 20G assembly features flanged end connections that comply with ANSI B16.1 Class 125 standards. It also includes flexible groove couplings between the body and gate valves.

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