2 1/2 LF866-DOSY-GPM-FS

Item Number: F683162
1 1
$11,967.25
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 2 1/2 inch
  • Lead Free: Yes, NSF Certified
  • Body Material: Ductile Iron Grade 65-45-12 with ArmorTek Coating
  • Max Working Pressure: 175 PSI
  • Temperature Range: 33°F to 140°F
  • Shutoff Valves: UL/FM Approved OS&Y Gate Valves
  • Bypass: GPM Metered for leak detection
  • Flood Detection: SentryPlus Alert® Sensor

Description

The 2 1/2 inch FEBCO MasterSeries LF866 Lead Free Reduced Pressure Zone Detector Backflow Preventer Assembly provides critical protection against backpressure and backsiphonage in potable water systems. Designed for industrial and high-hazard applications, it features a durable ductile iron body with ArmorTek® epoxy coating for corrosion resistance. Key components like the relief valve seat and checks are stainless steel for extended life. This assembly includes a GPM bypass meter for detecting leaks and a SentryPlus Alert® flood sensor to monitor for excessive relief valve discharge, ensuring system integrity and safety.

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How It Connects

  • This 2 1/2 inch backflow preventer assembly is designed for installation on potable water supply lines at cross-connection points in industrial and high-hazard applications.
  • The main line connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • The assembly is equipped with OS&Y resilient wedge gate valves for secure shut-off control.
  • An add-on sensor connection kit (not included) allows the flood sensor to integrate with building management systems (BMS) via RS-485 Modbus, cellular communication, or Wi-Fi through the Nexa® platform.
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Additional Details

The 2 1/2 inch FEBCO MasterSeries LF866 Lead Free Reduced Pressure Zone Detector Backflow Preventer Assembly is designed to protect potable water systems from high hazard (toxic) contamination caused by backpressure and backsiphonage.

This assembly is ideal for industrial installations and cross-connection applications, featuring an integrated GPM bypass meter and an advanced flood sensor.

Key Features

  • Features a flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
  • Includes an add-on sensor connection kit to extend flood monitoring capabilities, relaying alerts for potential flooding events via BMS, cellular communication, or Wi-Fi through the Nexa® platform.
  • Constructed with a lead-free ductile iron body, featuring a patented 3-part ArmorTek® epoxy coating applied to internal and external surfaces for superior resistance to electrochemical corrosion and microbial-induced corrosion.
  • Incorporates stainless steel relief valve seat and stainless steel check components for maximum performance and extended durability.
  • Equipped with UL Classified and FM Approved OS&Y resilient seated shutoff valves.
  • Designed with independent top entry covers for check modules, allowing for easy servicing without special tools.
  • Features field replaceable seats and disc rubbers for simplified maintenance.
  • A detector bypass assembly with a gallons per minute (GPM) meter detects leaks or unauthorized water usage.

Specifications

General

  • Product Type: Reduced Pressure Zone Detector Backflow Preventer
  • Size: 2 1/2 inch
  • Main Valve Body Material: Ductile iron Grade 65-45-12
  • Relief Valve Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating (internal & external surfaces)
  • Shutoff Valves: OSY resilient wedge gate valve AWWA C515 (UL Classified and FM Approved)
  • Check Seats Material: Stainless steel
  • Relief Valve Seat Material: Stainless steel
  • Disc Holder Material: Stainless steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless steel
  • Bypass Meter Type: Gallons Per Minute (GPM)
  • Flood Sensor: SentryPlus Alert® Technology

Pressure & Temperature

  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Minimum Working Pressure: 20 PSI (1.4 bar)
  • Hydrostatic Test Pressure: 350 PSI (24.1 bar)
  • Hydrostatic Safety Pressure: 700 PSI (48.3 bar)
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)

Certificates & Approvals

  • Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • ASSE 1047
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO/CUPC
  • AWWA Standard C511 Compliant (Main & Bypass Check Assembly)
  • AWWA Standard C700 Compliant (Water Meter)
  • ASME B16.1 Class 125 (End Connections)
  • AWWA Class D Flange (End Connections)
  • NSF Certified to NSF/ANSI/CAN 61 & 372 (Lead-Free)

FAQs

What is the primary purpose of the FEBCO MasterSeries LF866 backflow preventer?

The primary purpose is to protect potable water systems from contamination caused by backpressure and backsiphonage, especially in high-hazard and industrial applications.

What materials are used for the main body and internal components?

The main valve body and relief valve body are made of lead-free ductile iron Grade 65-45-12, coated with ArmorTek epoxy for corrosion resistance. Internal components like check seats, relief valve seats, and springs are stainless steel, and elastomer discs are silicone.

Does this backflow preventer detect leaks or unauthorized water usage?

Yes, it includes a detector bypass assembly with a gallons per minute (GPM) meter designed to detect leaks or unauthorized water usage within the water system.

What is the function of the SentryPlus Alert® flood sensor?

The SentryPlus Alert® flood sensor detects continuous discharge from the relief valve, indicating potential flooding. It can be connected to an add-on kit to send alerts via BMS, cellular, or Wi-Fi.

What are the operating pressure and temperature ranges for this assembly?

This backflow preventer has a maximum working pressure of 175 PSI and a minimum working pressure of 20 PSI. It operates effectively within a temperature range of 33°F to 140°F (0.5°C to 60°C).