4 DERINGER 50 GPM

Item Number: D-4050-GPM
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$4,737.51
Limited Stock (3)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Deringer
  • Size: 4 inch
  • Weight: 60.0 lb
  • Housing Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Integral Eccentric-Seal™ Butterfly Shutoff Valves
  • Dual-Action™ Check Module for superior flow performance
  • Lead Free Bypass Components with GPM Meter
  • SentryPlus Alert® Flood Sensor Technology

Description

The Ames Deringer 50 Reduced Pressure Detector Backflow Preventer Assembly is a 4-inch, lead-free device designed for fire sprinkler systems to prevent hazardous contaminants from entering potable water supplies. Constructed with a 304 stainless steel housing, it features integral butterfly shutoff valves with prewired supervisory switches and dual-action check modules for reliable performance across various flow rates. The assembly includes a GPM bypass meter for monitoring and a SentryPlus Alert flood sensor to detect relief valve discharge, enhancing system safety and compliance. It is approved for fire protection, waterworks, plumbing, and irrigation applications.
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Additional Details

The Ames Deringer™ 50 Reduced Pressure Detector Backflow Preventer Assembly is designed to prevent non-health hazard pollutants and hazardous contaminants from entering a potable water supply system due to backpressure and/or backsiphonage conditions. This 4 inch assembly is primarily used on fire sprinkler systems when monitoring of unauthorized water use is required.

Key Features

  • Features integral Eccentric-Seal™ butterfly shutoff valves for a short lay length, approved for both indoor and outdoor applications.
  • Includes integrated tamper switches within a weatherproof actuator housing and prewired supervisory switches for enhanced monitoring.
  • Utilizes True-Seal™ and Dual-Action™ checks, providing poppet action for low flow and swing action for high flow performance.
  • A balanced chamber relief valve with no sliding seals ensures reliable operation.
  • Equipped with a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve, with optional add-on kits for BMS and cellular communication.
  • The bypass assembly includes lead free bronze components and a GPM meter for monitoring unauthorized water usage.
  • The entire valve housing is constructed of 304 stainless steel for durability and corrosion resistance.

Specifications

  • Size: 4 inch
  • Model: 50
  • Valve Housing Material: 304 Stainless Steel
  • Valve Cover Material: 304 Stainless Steel
  • SOV Disk Material: EPDM/304SS
  • SOV Shafts Material: 304 Stainless Steel
  • Bypass Spring Material: 302 Stainless Steel
  • RV Spring Material: 302 Stainless Steel
  • SOV Bearings: PTFE Fluoropolymer/Bronze
  • Non-Wetted Bolts: Grade 8 Zinc Plated
  • Check Disks Material: Silicone (NSF)
  • Wetted Fasteners: 18-8 Stainless Steel
  • Bypass Components: Lead Free Bronze
  • RV Housing Material: 304 Stainless Steel
  • 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)
  • RV Hose: Braided Stainless Steel Wire

Performance

  • Temperature Range: 33°F - 140°F
  • Maximum Working Pressure: 10-175 psi

Dimensions (4 inch Model)

  • Height (Ht): 7.9 inches (201 mm)
  • Bypass Height (Hb): 8.7 inches (221 mm)
  • Length (L): 18.7 inches (475 mm)
  • Bypass Diameter (D): 0.2 inches (5 mm)
  • Overall Height (H): 16.6 inches (422 mm)
  • Width (W): 11.0 inches (279 mm)
  • Weight: 51 lbs (23 kg)

Certificates & Approvals

  • AWWA C511-07 Compliant
  • ANSI/NSF/CAN 61 UL Certified Health Effects
  • UL Certified to ANSI/NSF/CAN 372 LEAD FREE
  • FM Approved
  • ASSE 1047-2021
  • USC Approved

FAQs

What is the primary application of the Ames Deringer 50 backflow preventer?

This 4 inch Deringer 50 RPDA-II assembly is primarily used on fire sprinkler systems that require monitoring of unauthorized water usage. It prevents non-health hazard pollutants and hazardous contaminants from entering potable water supplies.

What material is the main housing of the Deringer 50 made from?

The main valve housing of the Deringer 50 Reduced Pressure Detector Assembly is constructed entirely of 304 stainless steel, ensuring durability and corrosion resistance.

What type of end connections does this backflow preventer use?

This 4 inch backflow preventer features IPS grooved ends for steel pipe, compliant with AWWA C606. It is also compatible with flange adapters that meet ANSI B16.1 Class 125 standards.

Does this model include a flood sensor?

Yes, this Deringer 50 assembly includes a flood sensor with SentryPlus Alert® technology. This sensor detects excessive water discharges from the relief valve, and an add-on sensor connection kit can provide alerts to personnel.

What are the maximum operating pressure and temperature ranges for this device?

The Ames Deringer 50 is rated for a maximum operating pressure of 175 psi (12 bar). Its temperature range is 33°F to 140°F, making it suitable for a variety of water supply conditions.

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