4 LF860-NRS-FS

Item Number: F122934
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$12,158.31
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 4 inch
  • Weight: 465.0 lb
  • Valve Type: Non-Rising Stem (NRS)
  • Lead Free: Yes
  • Body Material: Ductile iron
  • Corrosion Protection: ArmorTek® coating
  • Max. Working Pressure: 175 psi
  • Temperature Range: 33°F – 140°F
  • Flood Detection: SentryPlus Alert® sensor

Description

The 4 inch Lead Free MasterSeries® LF860 Reduced Pressure Zone Assembly with Non-Rising Stem (NRS) shutoff valves is engineered to safeguard potable water systems from high hazard/toxic contamination. Its robust ductile iron body features ArmorTek® epoxy coating for superior corrosion resistance and extended service life. This assembly includes a SentryPlus Alert® flood sensor to detect relief valve discharge, offering an additional layer of protection. With stainless steel internal components and inline serviceability, it ensures reliable performance and easy maintenance. Ideal for industrial and commercial applications requiring stringent backflow prevention. Item number F122934.

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Connections

  • This 4 inch Reduced Pressure Zone Assembly features end connections compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • It is designed for installation on potable water supply lines at points of cross-connection to protect against high hazard/toxic backpressure and backsiphonage conditions.

Flood Sensor Activation

The integrated flood sensor requires an add-on connection kit (sold separately) for activation. Connection kit options include those compatible with Building Management Systems (BMS), cellular networks, or the Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details

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

Featuring non-rising stem (NRS) shutoff valves, this assembly is ideal for industrial installations requiring robust protection against contaminated water flow.

Advanced Protection & Durability

  • Equipped with a flood sensor and SentryPlus Alert® technology to detect excessive water discharge from the relief valve, signaling potential flooding.
  • ArmorTek® coating, a patented three-part advanced epoxy system, provides superior resistance against microbial-induced corrosion (MIC) and protects exposed metal surfaces.
  • Constructed with a ductile iron valve body and stainless steel relief valve seat and check components for maximum performance and extended durability.
  • Designed for inline serviceability without requiring special tools, simplifying maintenance.

Key Components

  • Features captured modular spring assembly, reversible and replaceable discs, and field replaceable seats.
  • Includes a modular and repairable pressure differential relief valve and clapper check assembly.
  • Lead Free construction ensures compliance with low lead installation requirements, with wetted surfaces containing less than 0.25% lead by weight.

Installation requires an add-on connection kit to activate the flood sensor's alert capabilities. Always comply with all required instructions, codes, and regulations related to installation, operation, and maintenance, including providing proper drainage for discharge.

Specifications

  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Nominal Size: 4 inch
  • Shutoff Valves: Non-Rising Stem (NRS)
  • Body Material: Ductile iron Grade 65-45-12
  • Coating: ArmorTek powder coating
  • Relief Valve Seat: Stainless steel
  • Check Components: Stainless steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless steel
  • 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

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 is the primary purpose of the LF860 Reduced Pressure Zone Assembly?

The primary purpose of the LF860 assembly is to protect potable drinking water systems from contamination due to backpressure and backsiphonage of high hazard/toxic fluids, as mandated by local governing water utility codes.

Is this backflow preventer assembly lead-free?

Yes, the MasterSeries LF860 assembly is constructed with lead-free materials. The wetted surfaces contain less than 0.25% lead by weight, complying with low lead installation requirements.

What is ArmorTek® coating, and why is it important?

ArmorTek® coating is a patented three-part advanced epoxy system applied to the ductile iron components. It's crucial for reducing microbial-induced corrosion (MIC) and protecting exposed metal substrate, thereby extending the life and reliability of the backflow preventer.

How does the flood sensor function, and what is needed to activate its alert features?

The flood sensor detects excessive water discharges from the relief valve. To activate its alert capabilities (e.g., calls, emails, texts), an add-on connection kit (sold separately) is required. Without the kit, the sensor is passive.

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

This assembly has a maximum working pressure of 175 psi (12.1 bar) and a minimum working pressure of 20 psi (1.4 bar). Its continuous operating temperature range is 33°F to 140°F (0.5°C to 60°C).

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