1/2 LF850U-QT DC

Item Number: 0122963
1 1
$539.63
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 1/2 inch
  • Weight: 5.0 lb
  • Lead Free* cast copper silicon alloy body
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 32°F to 140°F
  • NPT ANSI/ASME B1.20.1 End Connections
  • Union quarter turn ball valve shutoffs
  • Compact modular design for easy maintenance
  • Includes integral freeze sensor for temperature monitoring

Description

The FEBCO 1/2 inch LF850U-QT Lead Free Double Check Valve Backflow Preventer Assembly is designed to prevent polluted water from entering potable water supplies due to backsiphonage or backpressure in non-health hazard applications. It features a lead-free cast copper silicon alloy body and union end connections with quarter-turn ball valve shutoffs. The compact modular design allows for easy in-line repairs with a single access cover. This assembly includes two independent check modules, top-mounted test cocks, and a freeze sensor for temperature monitoring, making it suitable for continuous pressure piping systems. Item number 0122963.

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Connections

  • This 1/2 inch LF850U-QT Double Check Valve Assembly features NPT ANSI/ASME B1.20.1 end connections.
  • The integral union end connections simplify installation and removal for maintenance.
  • This assembly uses quarter turn ball valve shutoffs for easy isolation.
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Additional Details

This 1/2 inch Lead Free Double Check Valve Backflow Preventer Assembly is designed to protect potable water supplies from pollution due to backsiphonage or backpressure in non-health hazard applications. It is ideal for continuous pressure piping systems and cross-connections identified as non-health hazards.

The assembly features a compact modular design for easy in-line maintenance and includes a freeze sensor for monitoring temperature.

WARNING: The freeze sensor only provides alerts about a possible freeze event and cannot prevent it. User action is required to prevent freeze conditions from causing product and/or property damage.

Features

  • Lead Free cast copper silicon alloy construction for compliance with reduced lead content requirements
  • Two independently operating, spring-loaded check valves
  • Compact modular design with a single access cover for in-line repairs
  • Union end connections for easier installation and maintenance
  • Quarter turn ball valve shutoffs
  • Top-mounted test cocks for testing
  • Replaceable seats and seat discs
  • Includes a freeze sensor mounted to one of the test cocks to monitor temperature
  • Tee handles for shutoff valves

Design & Operation

  • Protects against polluted water from backsiphonage and backpressure
  • Designed for non-health hazard applications
  • Consists of two in-line independent positive seating check modules
  • Factory pre-set pressure drop of approximately 1.0 psig across each check valve with no flow

Specifications

General

  • Size: 1/2 inch
  • Product Type: Double Check Valve Assembly
  • Operation: Two independently operating, spring-loaded check valves
  • Minimum Clearance (to Fixed Structure): 12 inches

Materials

  • Valve Body: Lead Free* cast copper silicon alloy
  • Elastomers: Silicone
  • Springs: Stainless steel
  • Seats: Noryl®
  • Poppet: Noryl
  • Test Cocks: Lead Free* cast copper silicon alloy

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Hydrostatic Test Pressure: 350 psi (24.1 bar)
  • Temperature Range: 32°F to 140°F (0°C to 60°C)
  • Pressure Drop (each check valve): Approximately 1.0 psig (no flow)

Connections

  • End Connections: NPT ANSI/ASME B1.20.1
  • Shutoff Type: Quarter turn ball valves with union ends

Certificates & Approvals

  • ASSE: 1015
  • CSA: B64.5
  • NSF: NSF/ANSI 61-G
  • USC-FCCCHR: Approved
  • ANSI/AWWA Conformance: C510-92

FAQs

What type of backflow protection does this assembly provide?

This assembly provides backflow protection against polluted water entering the potable supply due to backsiphonage or backpressure. It is designed for non-health hazard applications.

What is the maximum operating pressure for this valve?

The maximum working pressure for the 1/2 inch LF850U-QT Double Check Valve Assembly is 175 psi (12.1 bar).

What are the operating temperature limits?

This backflow preventer can operate within a temperature range of 32°F to 140°F (0°C to 60°C).

What type of connections does this assembly have?

The assembly features 1/2 inch NPT ANSI/ASME B1.20.1 end connections with union quarter turn ball valve shutoffs, simplifying installation and maintenance.

Does this product include a freeze sensor?

Yes, this FEBCO LF850U-QT assembly includes a freeze sensor mounted to one of the test cocks to monitor temperature. An add-on connection kit (sold separately) is required to activate the sensor's full monitoring capabilities.