4 LF886-W-DOSY-CFM-FS

Item Number: F8007390
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$16,124.25
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 4 inch
  • Weight: 342.0 lb
  • Body Material: Ductile Iron Grade 65-45-12 with ArmorTek Coating
  • Max Working Pressure: 175 psi
  • Flood Sensor: SentryPlus Alert® Technology included
  • Bypass: Cubic Feet per Minute (CFM) Metered
  • Shutoff Valves: Domestic OSY, UL Classified and FM Approved
  • Check Components: Stainless Steel
  • Lay Length: Competitor N-Pattern drop-in replacement

Description

The 4-inch FEBCO LF886-W-DOSY-CFM-FS is a lead-free MasterSeries® reduced pressure detector backflow preventer assembly designed to protect potable water from high hazard (toxic) fluids in industrial water services. It features a ductile iron body with ArmorTek® corrosion-resistant coating, stainless steel internal components, and domestic OSY shutoff valves. The assembly includes a SentryPlus Alert® flood sensor to detect excessive relief valve discharge and a CFM metered bypass for monitoring water usage. Its longer lay-length allows for direct replacement of competitor N-pattern valves. This robust unit ensures dependability and extended service life.
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Additional Details

This 4 inch lead free MasterSeries® reduced pressure detector backflow preventer assembly is designed to protect water services against high hazard (toxic) fluids in industrial installations and applications.

The valve features a longer lay-length for drop-in replacement of competitor’s N-pattern valves, offering greater dependability and extended valve life. It includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.

Features

  • Equipped with a flood sensor with SentryPlus Alert® technology to detect continuous relief valve discharge.
  • Supports add-on sensor connection kits for extended flood monitoring and integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity.
  • Designed for drop-in replacement of competitor’s N-pattern valves due to its longer lay-length.
  • Constructed with a ductile iron body, featuring ArmorTek® corrosion-resistant powder coating on internal and external surfaces.
  • Combines a stainless-steel relief valve seat and stainless-steel check components for maximum performance and durability.
  • Features a Type II Bypass with a cubic feet per minute (CFM) metered bypass.
  • Includes replaceable stainless steel check seats and ball valve test cocks.
  • Modular and repairable pressure differential relief valve.
  • Inline serviceable relief valve and bypass check assembly, requiring no special tools for servicing.
  • OSY resilient wedge gate valves are UL Classified and FM Approved.

Notice: FEBCO is not responsible for the failure of alerts due to connectivity issues, power outages, or improper installation. The information provided herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all supplied instructions and product safety information before beginning the installation of this product. Inquire with governing authorities for local installation requirements.

Specifications

  • Product Type: Reduced Pressure Detector Backflow Preventer
  • Nominal Size: 4 inch
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek Powder Coating (internal and external)
  • Shutoff Valves: OSY Resilient Wedge Gate Valve
  • Check Seats: Stainless Steel
  • Relief Valve Seat: Stainless Steel
  • Disc Holder: Stainless Steel
  • Elastomer Disc: Silicone
  • Spring Material: Stainless Steel
  • Clamp Material: AWWA C606

Performance

  • 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

Connections & Orientations

  • Lay Length (N-Pattern): 32 3/16 inches (818 mm)
  • Lay Length (Z-Pattern): 32 13/16 inches (833 mm)
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • Flow Orientation: Horizontal (N-Pattern)

Metering

  • Bypass: Cubic Feet per Minute (CFM) Totalizing Meter (ANSI/AWWA C700 Compliant)

Sensors

  • Relief Valve Flood Sensor: Included with SentryPlus Alert® Technology

Certificates & Approvals

  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO/cUPC
  • AWWA Standard C511-Compliant
  • AWWA Standard C700 Compliant (for CFM meter)
  • AWWA 1047
  • ASME 1041
  • CSA B64.4
  • Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCCHR-USC)

FAQs

What is the primary use of this backflow preventer?

This backflow preventer is primarily used to protect potable water supplies from high hazard (toxic) fluids in industrial installations and applications, preventing backflow into the main water service.

Does this backflow preventer come with a flood sensor?

Yes, it includes a flood sensor with SentryPlus Alert® technology. This sensor is designed to detect excessive water discharges from the relief valve, providing alerts for potential flooding events.

What type of shutoff valves are included with this assembly?

This assembly comes with domestic OSY (Outside Stem & Yoke) resilient wedge gate shutoff valves, which are UL Classified and FM Approved.

What is the maximum operating pressure for this device?

The maximum working pressure for this 4-inch backflow preventer is 175 psi (12.1 bar).

Is this unit suitable as a replacement for other brands?

Yes, this model features a longer lay-length specifically designed for a direct drop-in replacement of competitor's N-pattern valves, simplifying installation for upgrades or replacements.

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