8 DERINGER 50G GPM

Item Number: D-8050G-GPM
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$12,945.57
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Size: 8 inch
  • Type: Reduced Pressure Detector Assembly (RPDA-II)
  • Body Material: 304 Stainless Steel
  • Maximum Operating Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • End Connections: Flanged ANSI B16.1 Class 125
  • Shutoff Valves: OS&Y, Resilient Seated
  • Bypass Meter: GPM (Gallons Per Minute)
  • Flood Sensor: SentryPlus Alert® Technology

Description

The 8 inch Ames Deringer™ 50G Reduced Pressure Detector Assembly (RPDA-II) prevents hazardous pollutants and non-health hazard contaminants from entering potable water systems. It features a durable stainless steel body, inline serviceable OS&Y gate valves, and patented Dual-action™ check modules for reliable low and high-flow performance. Ideal for fire sprinkler systems requiring monitoring of unauthorized water usage, this assembly includes a GPM bypass meter and a flood sensor with SentryPlus Alert® technology. With a maximum working pressure of 175 psi, it ensures robust backflow prevention for continuous pressure service. Item D-8050G-GPM.

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Connections

  • This assembly features 8 inch flanged ends conforming to ANSI B16.1 Class 125 for secure installation into your piping system.
  • Flexible groove couplings are UL Classified and FM Approved, connecting the body and gate valves.
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Additional Details

This 8 inch Ames Deringer™ 50G Reduced Pressure Detector Assembly (RPDA-II) with a GPM meter is designed to prevent hazardous contaminants and non-health hazard pollutants from entering a potable water supply system when backpressure and/or backsiphonage conditions occur.

It is primarily used on fire sprinkler systems when monitoring unauthorized water use is required.

Key Features

  • Poppet action first check for more reliable relief valve closure.
  • Stem includes a tamper switch groove.
  • Inline serviceable OS&Y gate valves.
  • Tamper-resistant test cocks for security.
  • Durable stainless steel housing.
  • Patented Dual-action™ second check module provides both poppet action at low flow and swing action at high flow.
  • Includes a CuFt or gallons bypass meter for monitoring water usage.
  • Lead Free* bronze bypass components and stainless steel braided wire sensing line.
  • Silicone elastomer check discs and seals.
  • Balanced chamber relief valve requiring no sliding seals.
  • Features a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.

Specifications

  • Size: 8 inch
  • Type: Reduced Pressure Detector Detector Assembly (RPDA-II)
  • End Connections: Flange - ANSI B16.1 Class 125
  • Maximum Operating Pressure: 175 psi (12 bar)
  • Temperature Range: 33°F - 140°F
  • Check Module: Dual-action™ (Poppet low flow, Swing high flow)
  • Shutoff Valves: Resilient Seated, Inline Serviceable OS&Y Gate Valves
  • Bypass Meter: GPM (Gallons Per Minute)
  • Flood Sensor: SentryPlus Alert® Technology

Materials

  • Valve Housing Material: 304 Stainless Steel
  • Valve Cover Material: 304 Stainless Steel
  • SOV Disks Material: EPDM/304SS
  • SOV Shafts Material: 304 Stainless Steel
  • Bypass Spring Material: 304 Stainless Steel
  • RV Spring Material: 302 Stainless Steel
  • SOV Bearings Material: PTFE Fluoropolymer/Bronze
  • Non-wetted Bolts Material: Grade 8 Zinc Plated
  • Check Disks Material: Silicone (NSF)
  • Wetted Fasteners Material: 18-8 Stainless Steel
  • Bypass Components Material: Lead Free Bronze
  • RV Housing Material: 304 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)
  • Bypass Internals Material: ABS Polymer (NSF)
  • RV House Material: Braided Stainless Steel Wire

Certificates & Approvals

  • AWWA C511-07 Compliant
  • NSF/ANSI 372
  • UL Certified
  • Lead Free*
  • UL Classified (Flexible Groove Coupling)
  • FM Approved (Flexible Groove Coupling)
  • ASSE 1047-2021
  • USC Approved

FAQs

What is the primary purpose of the Deringer™ 50G Reduced Pressure Detector Assembly?

The Deringer™ 50G RPDA-II is designed to prevent hazardous contaminants and non-health hazard pollutants from entering a potable water supply system due to backpressure or backsiphonage. It is primarily used in fire sprinkler systems to monitor unauthorized water usage.

What type of end connections does this 8 inch model have?

This 8 inch Deringer™ 50G assembly features flanged ends that conform to ANSI B16.1 Class 125. It also utilizes flexible groove couplings, UL Classified and FM Approved, between the body and gate valves.

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

The maximum operating pressure for this backflow preventer is 175 psi. It is designed to operate safely within a temperature range of 33°F to 140°F.

What are 'Dual-action™' check modules?

The patented Dual-action™ check modules provide high performance across different flow rates. They operate as a 'poppet style' check under low flow conditions and a 'swing style' check under high flow conditions, ensuring reliable backflow prevention.

Does this assembly include a bypass meter for water usage?

Yes, the Deringer™ 50G Reduced Pressure Detector Assembly includes a bypass assembly with a GPM (gallons per minute) meter. This feature is useful for monitoring unauthorized water usage, especially in fire sprinkler systems.

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