6 LF850-DNRS

Item Number: 0683083
1 1
$12,346.76
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 6 inch
  • Weight: 595.0 lb
  • Model: LF850 Double Check Valve Assembly
  • Lead Free Construction: Wetted surface contains less than 0.25% lead
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek® Powder Coating for corrosion protection
  • Shutoff Valves: Domestic Non-Rising Stem (NRS) Gate Valves
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F (0.5°C ~ 60°C)

Description

This 6-inch FEBCO MasterSeries LF850 is a Lead Free double check valve backflow preventer assembly designed to protect potable water systems from non-health hazard (pollutant) backflow. It features a durable ductile iron body with ArmorTek® epoxy coating for corrosion resistance and domestic non-rising stem shutoff valves. Ideal for continuous pressure piping applications, this assembly is ASSE 1015 listed, UL Classified, FM Approved, and CSA Listed. Its in-line serviceable design allows for easy maintenance without special tools. The lead-free construction ensures compliance with low lead installation requirements.

Help Me Connect

Connections and Compatibility

  • Designed for installation on potable water supply lines and at points of cross-connection to prevent backflow in non-health hazard (pollutant) applications.
  • End connections are compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.
  • Equipped with domestic Non-Rising Stem (NRS) resilient seated gate valves, compliant with AWWA C509 standards.
View full details

Additional Details

This 6 inch Lead Free MasterSeries® LF850 double check valve assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and/or backpressure. It provides protection in continuous pressure piping applications and at cross-connections identified as non-health hazards.

Key Features

  • In-line serviceable assembly requiring no special tools for maintenance.
  • Features captured modular spring assembly, reversible and replaceable discs, and field replaceable seats.
  • Ductile iron valve body design with stainless steel check components.
  • ArmorTek® coating technology resists microbial-induced corrosion (MIC) and protects exposed metal substrates.
  • Includes a winterization feature with disc retainers and valve body drain ports.
  • Clapper check assembly with commonality between 1st and 2nd check components and captured O-ring design.

Construction Details

  • Fused epoxy ductile iron body and domestic non-rising stem resilient seated gate valves.
  • Two in-line independent positive seating check modules.
  • Includes top mounted test cocks.
  • Lead Free construction: Wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

NOTICE: The information contained 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 installation instructions and product safety information before beginning the installation of this product. Inquire with governing authorities for local installation requirements.

Specifications

  • Model: LF850
  • Size: 6 inch
  • Product Type: Double Check Valve Assembly
  • Shutoff Valves: Domestic Non-Rising Stem (NRS) Gate Valves
  • Body Material: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek® Powder Coating (internal and external)
  • Check Seats Material: Stainless Steel
  • Disc Holder Material: Stainless Steel
  • Elastomer Disc Material: Silicone
  • Spring Material: Stainless Steel
  • Lead Content: Wetted surface contains less than 0.25% lead by weight
  • Max. Working Pressure: 175 psi (12.1 bar)
  • Min. Working Pressure: 10 psi (0.7 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 FCCCHR-USC
  • ASSE 1015 Listed
  • UL Classified (U.S. & Canada)
  • FM Approved
  • IAPMO
  • CSA Listed (B64.5)
  • AWWA Standard C510 Compliant
  • Certified to NSF/ANSI 61-G
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

Dimensions (NRS Gate Valves)

  • Overall Length (Dimension A): 56 in (1422 mm)
  • Face-to-Face Check Assembly (Dimension B): 34 3/4 in (883 mm)
  • Height (Dimension C): 12 3/4 in (324 mm)
  • Gate Valve Length (Dimension D**): 18 7/8 in (479 mm)
  • Dimension F: 6 1/2 in (165 mm)
  • Dimension G: 9 7/8 in (251 mm)
  • Weight (NRS****): 478 lb (217 kg)

FAQs

What is the primary function of the FEBCO LF850 Double Check Valve Assembly?

This 6-inch Lead Free double check valve assembly is designed to prevent the backflow of polluted water from non-health hazard (pollutant) applications into the potable drinking water supply due to backsiphonage and/or backpressure conditions.

What does 'Lead Free' construction mean for this product?

The Lead Free construction means that the wetted surface of this product, when contacted by consumable water, contains less than 0.25% of lead by weight. This complies with low lead installation requirements and relevant codes.

What are the key materials used in the construction of this backflow preventer?

The main valve body is constructed from Ductile Iron Grade 65-45-12, coated with ArmorTek® powder coating. It features stainless steel check components, disc holders, springs, and silicone elastomer discs for durability and corrosion resistance.

What type of shutoff valves are included with the 6 LF850-DNRS model?

This specific model, 6 LF850-DNRS, is equipped with domestic Non-Rising Stem (NRS) resilient seated gate valves, which are compliant with AWWA C509 standards.

Is the FEBCO LF850 assembly easy to maintain?

Yes, this assembly is designed for in-line serviceability. Both check modules can be accessed through independently top entry covers, and no special tools are required for maintenance.

Related Products

1 2