4 LF860-DNRS-FS

Item Number: F683106
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$12,160.13
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • 4 inch Lead Free Reduced Pressure Zone Backflow Preventer
  • Weight: 455.0 lb
  • Protects against backpressure and backsiphonage in high hazard applications
  • ArmorTek® epoxy coating for corrosion resistance
  • Stainless steel relief valve seat and check components
  • Integrated flood sensor with SentryPlus Alert® technology
  • Includes domestic Non-Rising Stem (NRS) gate valves
  • Max. Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F

Description

The 4 inch FEBCO LF860 Lead Free Reduced Pressure Zone (RPZ) Backflow Preventer assembly is designed for high hazard/toxic applications, protecting potable water systems from backpressure and backsiphonage. It features an ArmorTek® epoxy-coated ductile iron body for advanced corrosion resistance and stainless steel internal components for durability. This assembly includes domestic non-rising stem (NRS) gate valves and an integrated SentryPlus Alert® flood sensor to detect excessive relief valve discharge. It is ASSE 1013, UL Classified, and FM Approved, ensuring reliable performance for industrial installations. Item number F683106.

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Flood Sensor Connectivity

The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate the sensor for relaying alerts about potential flooding, an add-on connection kit is required. Connection kit options include Building Management System (BMS) integration, cellular communication, or the Sensor Control Monitor which allows integration with a Building Automation System (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details

This 4 inch lead free FEBCO MasterSeries LF860 Reduced Pressure Zone assembly is designed to protect potable drinking water systems from backpressure and backsiphonage conditions in high hazard/toxic applications.

The assembly features a built-in flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve, providing alerts when paired with an add-on connection kit.

Key Features

  • Lead Free construction complies with low lead installation requirements.
  • ArmorTek® coating technology, a patented three-part advanced epoxy system, protects the ductile iron body against microbial-induced corrosion (MIC) and exposed metal substrate corrosion.
  • Stainless steel relief valve seat and stainless steel check components ensure maximum performance and durability.
  • Includes domestic non-rising stem (NRS) resilient seated gate valves.
  • Inline serviceable assembly requires no special tools for maintenance.
  • Features a modular and repairable pressure differential relief valve, along with clapper check assemblies.
  • Reversible and replaceable discs and field replaceable seats.

Specifications

General

  • Product Type: Reduced Pressure Zone (RPZ) Backflow Preventer Assembly
  • Model: LF860
  • Size: 4 inch
  • Shutoff Valves: Domestic Non-Rising Stem (NRS) Gate Valves
  • Application: High Hazard / Toxic
  • Flood Sensor: Integrated with SentryPlus Alert® technology

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: NRS resilient wedge gate valve AWWA C509
  • Check Seats: Stainless steel
  • Relief Valve Seat: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring: Stainless steel

Performance

  • Max. Working Pressure: 175 psi (12.1 bar)
  • Min. 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
  • Lead Content: Less than 0.25% by weight (wetted surface)

Certificates & Approvals

  • Approved by Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR-USC)
  • ASSE 1013 Listed
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO
  • AWWA Standard C511 Compliant
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
  • CSA B64.4
  • NSF Certified to NSF/ANSI 61-G

FAQs

What type of fluid protection does the FEBCO LF860 assembly provide?

The FEBCO LF860 is a Reduced Pressure Zone (RPZ) assembly designed to protect potable drinking water systems from both backpressure and backsiphonage conditions, specifically for high hazard/toxic applications.

How does the ArmorTek® coating benefit this backflow preventer?

The ArmorTek® coating is a patented three-part advanced epoxy system applied to the ductile iron body. It is engineered to limit microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the durability and lifespan of the assembly.

What are the shutoff valves included with this 4-inch assembly?

This 4-inch FEBCO LF860 assembly comes with domestic non-rising stem (NRS) resilient seated gate valves, which comply with AWWA C509 standards.

What is the purpose of the integrated flood sensor?

The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When paired with an add-on connection kit, it can relay alerts to personnel about potential flooding events.

What are the maximum and minimum operating pressures for this device?

This backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and a minimum working pressure of 20 psi (1.4 bar).

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