ASSE 1015 Listed for non-health hazard applications
In-line serviceable with no special tools required
Description
The Febco 3 inch LF850 Lead Free Double Check Valve Assembly protects potable water systems from polluted water backflow due to backsiphonage and backpressure. Featuring OS&Y resilient seated gate valves and standard flange connections, this assembly is ideal for non-health hazard applications. Its ductile iron body is coated with ArmorTek® advanced epoxy to resist microbial-induced corrosion. With a maximum working pressure of 175 psi and a temperature range of 33°F to 140°F, it offers reliable performance. The in-line serviceable design simplifies maintenance, requiring no special tools. This ASSE 1015 Listed assembly has a lay length of 41.875 inches and weighs 295 lbs. Item number 0683075.
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Connections
This 3 inch Double Check Valve Assembly features standard flange end connections. These connections are compliant with ASME B16.1 Class 125 and AWWA Class D Flange standards, ensuring compatibility with appropriately sized and specified flanged piping systems for potable water applications.
This 3 inch lead free Febco MasterSeries® LF850 Double Check Valve Assembly is designed to protect potable water systems from backflow of polluted water due to backsiphonage and backpressure conditions. It is ideal for continuous pressure piping applications and cross-connections identified as non-health hazards.
This assembly features a compact, modular design for easy in-line maintenance without special tools. It is constructed with a ductile iron body and domestic OS&Y (Outside Stem & Yoke) resilient seated gate valves, making it suitable for a wide range of installations.
Construction & Materials
Features a ductile iron body (Grade 65-45-12) coated with ArmorTek®, a patented three-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal surfaces.
Contains two independently acting stainless steel clapper style check modules with stainless steel disc holders and springs.
Includes replaceable stainless steel seats and silicone elastomer discs.
Lead Free* construction with wetted surfaces containing less than 0.25% lead, complying with low lead installation requirements.
Key Features
In-line serviceable assembly requiring no special tools for maintenance.
Captured modular spring assembly and captured O-ring design.
Reversible and replaceable discs and field replaceable seats.
Equipped with a winterization feature including disc retainers and valve body drain ports.
Commonality between 1st and 2nd check components simplifies parts management.
Temperature Range: 33°F - 140°F (0.5°C ~ 60°C) Continuous
Lead Content: Wetted surface less than 0.25%
Dimensions & Weight
Lay Length (Dimension A): 41.875 inches (1064 mm)
Dimension B: 25.625 inches (651 mm)
Dimension C: 10 inches (254 mm)
Dimension F: 4.5 inches (114 mm)
Dimension G: 7.375 inches (187 mm)
Assembly Weight (OSY): 295 lbs
Certificates & Approvals
Approved by Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
ASSE 1015 Listed
UL Classified (U.S. & Canada)
FM Approved
IAPMO
CSA Listed
AWWA Standard C510 Compliant
End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
NSF Certified to NSF/ANSI 61-G
FAQs
What is the primary use of the Febco 3" LF850 Double Check Valve Assembly?
This assembly is specifically designed for non-health hazard (pollutant) applications in potable drinking water systems. It protects against backpressure and backsiphonage conditions, preventing polluted water from entering the potable supply.
What materials are used for the valve body and internal components?
The main valve body is constructed from ductile iron (Grade 65-45-12) and coated with ArmorTek®, a patented three-part advanced epoxy system for corrosion resistance. Internal check components, disc holders, and springs are made of stainless steel, while elastomer discs are silicone.
Is special tooling required for servicing this backflow preventer?
No, the Febco LF850 is an in-line serviceable assembly that does not require any special tools for maintenance. Its compact modular design facilitates easy access for routine upkeep.
What are the maximum operating pressure and temperature range for the LF850?
This double check valve assembly has a maximum working pressure of 175 psi (12.1 bar). It is designed to operate continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).
Is this Febco LF850 model considered lead-free?
Yes, the Febco LF850 features lead-free construction. The wetted surface of the product, which contacts consumable water, contains less than 0.25% of lead by weight, complying with current low lead installation requirements.
