4 DERINGER 40G (RP)

Item Number: D-4040G
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$7,559.00
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Deringer
  • Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer
  • Weight: 209.0 lb
  • Nominal Size: 4 inch
  • Body Material: Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Features: Inline serviceable OS&Y gate valves
  • Includes: SentryPlus Alert® flood sensor technology
  • Approvals: AWWA C511-07, NSF/ANSI 372, UL, FM
  • Check Type: Dual-action (poppet/swing)

Description

This 4 inch Ames Deringer 40G Reduced Pressure Zone (RPZ) Backflow Preventer Assembly safeguards potable water systems from contamination due to backpressure or backsiphonage. Featuring a durable stainless steel body and inline serviceable OS&Y gate valves, it ensures reliable protection. The Deringer 40G incorporates True-Seal™ and Dual-Action™ checks for optimal performance across various flow rates, along with a SentryPlus Alert® flood sensor for detecting excessive relief valve discharge. It is designed for continuous pressure service up to 175 psi and is AWWA, NSF/ANSI 372 (Lead Free), UL, and FM approved, making it suitable for demanding applications.

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End Connections

This 4 inch Deringer™ 40G Reduced Pressure Zone Backflow Preventer features flanged end connections that conform to ANSI B16.1 Class 125 standards. These flanges allow for secure installation into compatible piping systems. Potable groove couplings are used internally between the body and gate valves.

Shutoff Valves

The assembly is equipped with inline serviceable OS&Y (Outside Stem and Yoke) gate valves. These valves are used for isolation purposes, allowing the system to be shut off for maintenance or testing without affecting the entire water supply.

Flood Sensor Connectivity

The integrated SentryPlus Alert® flood sensor can be activated with add-on sensor connection kits (sold separately) for communication with Building Management Systems (BMS) or cellular networks, enabling remote notification of excessive relief valve discharge.

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Additional Details

This 4 inch Ames Deringer™ 40G Reduced Pressure Zone (RPZ) backflow preventer assembly is designed to prevent hazardous contaminants and non-health hazard pollutants from entering potable water supply systems. It protects against both backpressure and backsiphonage conditions.

Key Features

  • Equipped with inline serviceable OS&Y gate valves for isolation and maintenance.
  • Features a stainless steel body and True-Seal™ and Dual-Action™ checks for high performance across low and high-flow rates.
  • Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • The flood sensor, when activated with an add-on connection kit, can send alerts to notify personnel of potential flooding.
  • Designed for continuous pressure service.

Operational Details

  • Tamper-resistant test cocks for secure testing.
  • Patented dual action check module with poppet action for low flow and swing action for high flow.
  • First check module features poppet action for reliable relief valve closure.
  • Balanced chamber relief valve with no sliding seals.
  • Silicone elastomer check discs ensure durability and performance.
  • Potable groove couplings (UL Classified/FM Approved) are used between the body and gate valves.

Specifications

  • Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer
  • Model: Deringer™ 40G
  • Nominal Size: 4 inch
  • Body Material: Stainless Steel
  • Valve Type: OS&Y Gate Valves (Inline serviceable)
  • Check Modules: Dual-action (Poppet for low flow, Swing for high flow)
  • Check Discs: Silicone Elastomer
  • Relief Valve: Balanced Chamber (no sliding seals)
  • End Connection: Flanged (ANSI B16.1 Class 125)
  • Maximum Working Pressure: 175 psi (12 bar)
  • Pressure Range: 10 - 175 psi
  • Minimum Operating Temperature: 33°F
  • Maximum Operating Temperature: 140°F

Materials

  • Valve Housing: 304 Stainless Steel
  • Valve Cover: 304 Stainless Steel
  • SOV Body: 304LMNSS
  • SOV Shafts: 304 Stainless Steel
  • SOV Rings: 304 Stainless Steel
  • SOV Bearings: PTFE Fluoropolymer/Bronze
  • Non-wetted Bolts: Grade 8 Zinc Plated
  • Check Seats: Noryl/Polyphenylene (NSF)
  • O-rings: Buna-N (NSF)
  • RV Spring: Braided Stainless Steel Wire
  • Check Springs: 17-7/18-8 Stainless Steel
  • Wetted Fasteners: 18-8 Stainless Steel
  • RV Housing: 304 Stainless Steel

Dimensions (Approximate)

  • Overall Height (Ht): 40.0 inch
  • Height from Bottom to Centerline (Hb): 10.5 inch
  • Length (L): 31.8 inch
  • Total Height (Ht+Hb): 41.4 inch
  • Width (W): 12.5 inch
  • Weight: 189 lb

Certificates & Approvals

  • AWWA C511-07 Compliant
  • NSF/ANSI 372 (Lead Free)
  • UL Certified (USC Approved)
  • FM Approved

FAQs

What is the primary purpose of the 4 inch Ames Deringer 40G backflow preventer?

The primary purpose is to prevent hazardous contaminants and non-health hazard pollutants from entering a potable water supply system due to backpressure or backsiphonage conditions.

What type of shutoff valves does this assembly use?

This assembly uses inline serviceable OS&Y (Outside Stem and Yoke) gate valves, which allow for isolation and maintenance of the backflow preventer.

What is the maximum operating pressure for the Deringer 40G?

The maximum working pressure for this 4 inch Deringer 40G backflow preventer is 175 psi (12 bar).

Does this backflow preventer come with flood detection capabilities?

Yes, it includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. Add-on sensor connection kits are available for notification.

What are the connection types for this 4 inch Deringer 40G assembly?

This backflow preventer features flanged end connections that conform to ANSI B16.1 Class 125 standards for secure installation into piping systems.

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