Lead Free Construction: Less than 0.25% lead content
Size: 4 inch
Maximum Working Pressure: 175 psi
Temperature Range: 33°F - 140°F
Body Material: Ductile Iron Grade 65-45-12
Coating: ArmorTek advanced epoxy system
Check Components: Stainless Steel
Approved for Non-Health Hazard Applications
Description
The Febco 4 inch LF850 MasterSeries double check valve assembly is designed to protect potable water systems from non-health hazard pollutants caused by backpressure or backsiphonage. This lead-free device features a durable ductile iron body with ArmorTek advanced epoxy coating for superior corrosion resistance. It includes two in-line independent check valves with stainless steel components, ensuring reliable performance. With a maximum working pressure of 175 psi and a temperature range of 33°F to 140°F, it is suitable for various non-health hazard cross-connection applications. The assembly is serviceable in-line without special tools and is approved by ASSE 1015, UL, FM, IAPMO, and AWWA C510.
Help Me Connect
This 4 inch FEBCO MasterSeries LF850 double check valve assembly features flanged end connections. These connections are compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.
The Febco MasterSeries LF850 4 inch double check valve assembly is designed to protect potable drinking water systems from non-health hazard (pollutant) backflow caused by backpressure or backsiphonage.
This in-line backflow preventer is ideal for protection of non-health hazard cross-connections or for containment at the service line entrance, preventing pollutants from entering the potable water supply.
Key Features
Ductile iron body construction, ArmorTek epoxy coated internally and externally for corrosion resistance.
In-line serviceable assembly with no special tools required for servicing.
Features a clapper check assembly with stainless steel check components, reversible and replaceable discs, and field replaceable seats.
Captured modular spring assembly and Captured O-ring design.
Winterization feature includes disc retainers and valve body drain ports.
Commonality between first and second check components simplifies maintenance.
Specifications
General
Product Type: Double Check Valve Assembly
Model: FEBCO MasterSeries LF850
Size: 4 inch
Shutoff Valves: Less Shutoff Valves (Not an approved assembly)
Flow Orientation: Horizontal & Vertical Up
Lay Length: 28 inch (711 mm)
Weight (Less Gates): 311 lb (141 kg)
Materials
Main Valve Body: Ductile iron Grade 65-45-12
Coating: ArmorTek powder coating (internal and external)
Check Seats: Stainless steel
Disc Holder: Stainless steel
Elastomer Disc: Silicone
Spring: Stainless steel
Performance
Maximum Working Pressure: 175 psi (12.1 bar)
Minimum 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 (CSA B64.5)
AWWA Standard C510 Compliant
End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange
FAQs
What is the primary use of the Febco LF850 double check valve assembly?
It is primarily used to protect potable drinking water systems from non-health hazard pollutants, preventing backflow due to backpressure or backsiphonage. It is not suitable for health hazard applications.
What material is the body of the LF850 assembly made from?
The main valve body is constructed from ductile iron (Grade 65-45-12) and is coated with ArmorTek advanced epoxy system for enhanced corrosion resistance.
What are the pressure limitations for this device?
The maximum working pressure for the Febco LF850 is 175 psi (12.1 bar), with a minimum working pressure of 10 psi (0.7 bar). It has a hydrostatic test pressure of 350 psi (24.1 bar).
Does this assembly require special tools for maintenance?
No, the Febco LF850 double check valve assembly is designed for in-line servicing and does not require any special tools for maintenance.
What are the temperature limits for operation?
This backflow preventer can operate continuously within a temperature range of 33°F to 140°F (0.5°C to 60°C).
