8 LF866-DOSY-CFM-FS

Item Number: F683171
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$42,857.02
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 8 inch
  • Weight: 835.0 lb
  • Body Material: Lead Free Ductile Iron Grade 65-45-12
  • Coating: ArmorTek Powder Coating
  • Shutoff Valves: UL Classified & FM Approved OS&Y Gate Valves
  • Bypass Meter: 5/8" x 3/4" CFM Water Meter
  • Flood Detection: SentryPlus Alert® Sensor on Relief Valve
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F

Description

The 8 inch FEBCO MasterSeries LF866 Lead Free Reduced Pressure Detector Backflow Preventer Assembly provides critical protection for potable water supplies against high hazard backpressure and backsiphonage. Featuring a durable ductile iron body with ArmorTek® coating, stainless steel internals, and UL/FM Approved OS&Y shutoff valves, it ensures reliable, long-lasting performance. The integrated 5/8" x 3/4" CFM water meter detects unauthorized usage or leaks, while the SentryPlus Alert® flood sensor provides early warning of excessive relief valve discharge. This horizontal flow assembly is ideal for industrial cross-connection applications requiring robust safety and monitoring capabilities. Item number F683171.

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Connections

  • This 8 inch backflow preventer assembly is designed for installation on potable water supply lines at points of cross-connection.
  • End connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • The assembly is suitable for horizontal flow orientation.

Compatibility

  • Flood sensor features SentryPlus Alert® technology and can be integrated with an add-on connection kit (not included) for remote alerts via BMS, cellular communication, or Nexa® platform (Wi-Fi).
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Additional Details

This 8 inch lead free FEBCO MasterSeries LF866 Reduced Pressure Detector Backflow Preventer Assembly is engineered to safeguard potable water supplies from high hazard (toxic) backpressure and backsiphonage conditions in industrial installations.

It features a robust ductile iron body with ArmorTek® coating, replaceable stainless steel check seats, a CFM metered bypass, and a SentryPlus Alert® flood sensor for enhanced protection and monitoring.

Features & Benefits

  • Lead Free ductile iron body construction protected by a patented 3-part ArmorTek® epoxy coating system for superior resistance against electrochemical corrosion and microbial-induced corrosion.
  • Incorporates two (2) independently acting approved clapper style check modules with replaceable stainless steel check seats and disc rubbers for maximum performance and durability.
  • Includes UL Classified and FM Approved OS&Y resilient wedge gate valves and four (4) properly located resilient seated test cocks.
  • Auxiliary bypass line with a 5/8" x 3/4" cubic feet per minute (CFM) water meter (ANSI/AWWA C700 compliant) for detecting leaks or unauthorized water usage.
  • Equipped with a SentryPlus Alert® flood sensor on the relief valve to detect and signal excessive water discharges, with options for add-on connection kit integration to BMS, cellular communication, or the Nexa® platform via Wi-Fi for alerts.
  • Designed for horizontal flow orientation.
  • Main valve features a stainless steel relief valve seat and stainless steel check components for maximum performance and durability.
  • Servicing of check modules is tool-free and accessed through independent top entry covers.

Specifications

Construction Materials

  • Main Valve Body: Ductile iron Grade 65-45-12
  • Relief Valve Body: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating (internal and external surfaces)
  • Shutoff Valves: OSY resilient wedge gate valve (UL Classified and FM Approved, AWWA C515)
  • Check Seats: Stainless steel
  • Relief Valve Seat: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring: Stainless steel

Performance Ratings

  • 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) continuous
  • Maximum Service Flow Rate: Determined by max rated velocity of 7.5 fps
  • UL Flow Rate: Determined by typically rated velocity of 15 fps

Dimensions (Nominal with OSY Gate Valves, Full Open)

  • Size: 8 inch
  • Length (A): 48 3/4 inch (1238 mm)
  • Dimension (B): 30 1/4 inch (768 mm)
  • Height (C): 21 inch (533 mm)
  • Dimension (D): 16 inch (406 mm)
  • Dimension (E): 20 1/4 inch (514 mm)
  • Dimension (F): 11 1/4 inch (286 mm)
  • Dimension (G): 9 1/2 inch (241 mm)
  • Weight: 520 lbs (236 kg)

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
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • Certified to NSF/ANSI/CAN 61 & 372

FAQs

What is the primary function of the FEBCO LF866 backflow preventer?

The primary function is to protect potable water supplies from contamination caused by backpressure and backsiphonage of high hazard (toxic) fluids at cross-connection points in industrial settings.

What type of meter is included with this LF866 assembly?

This LF866 assembly includes a 5/8" x 3/4" cubic feet per minute (CFM) water meter in its auxiliary bypass line, which detects leaks or unauthorized water usage.

What is ArmorTek® coating and what are its benefits?

ArmorTek® is a patented 3-part epoxy coating applied to the ductile iron body. It provides integrated protection against electrochemical corrosion and microbial-induced corrosion for enhanced durability.

Does this backflow preventer include a flood detection feature?

Yes, it is equipped with a SentryPlus Alert® flood sensor on the relief valve to detect excessive water discharges. An optional add-on connection kit can enable remote alerts.

What are the maximum operating pressure and temperature limits for this assembly?

The maximum working pressure is 175 psi (12.1 bar). The continuous operating temperature range is 33°F to 140°F (0.5°C to 60°C).

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