1 LF767FR PVB

Item Number: 0683029
1 1
$870.74
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Nominal Size: 1 inch
  • Weight: 6.0 lb
  • Lead Free* Cast Silicon Copper Alloy Body
  • Freeze Resistant Design with Built-in Relief Valve
  • Maximum Working Pressure: 150 psi
  • Minimum Working Pressure: 15 psi
  • Temperature Range: 33°F to 140°F
  • Female NPT Inlet and Outlet with Quarter-Turn Lever Handle Shutoffs
  • ASSE 1020 and NSF/ANSI 372 Approved

Description

The FEBCO Series LF767FR is a 1 inch Lead Free freeze-resistant pressure vacuum breaker backflow preventer. It prevents backsiphonage of contaminated water into potable water supplies, suitable for continuous pressure health hazard applications like irrigation systems. Its superior design features a unique built-in relief valve that protects internal components from freezing by relieving pressure caused by ice formation. Constructed from Lead Free* cast silicon copper alloy with Female NPT connections and quarter-turn lever handle shutoffs, it offers easy maintenance and durability with a silicone seat disc. The assembly is rated for 15 to 150 psi and 33°F to 140°F, meeting ASSE 1020 and NSF/ANSI 372 standards.

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Installation Guidelines

  • This valve must be installed in a continuous pressure potable water supply system.
  • Ensure the installation point is 12 inches (305mm) above the highest point of the downstream piping to prevent backpressure conditions.
  • Connect the supply to the bottom and install the valve in a vertical position.
  • Allow adequate space around the valve for periodic inspection, servicing, or testing.
  • Do not install in areas where freezing or spillage could cause damage; provide adequate drainage and freeze protection in cold weather.
  • A minimum of 1.5 psi (10 kPa) must be exerted against the float spring to seal the float and air inlet.
  • Avoid undersizing supply and discharge piping.

Freeze Protection & Winterization

  • To winterize, first close the main shutoff valve.
  • Next, open the upstream drain, test cocks, and isolation ball valves to depressurize the line.
  • Purge the system with air.
  • Leave test cocks and isolation ball valve handles in a 45° angle to drain ball valves and prevent casting damage.

Note: These vacuum breakers are not designed, tested, or approved to protect against backpressure backflow or water hammer shock. For protection against backpressure backflow, install a Reduced Pressure Zone Backflow Preventer.

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Additional Details

This 1 inch Lead Free freeze-resistant pressure vacuum breaker backflow preventer is designed to prevent the reverse flow of polluted water from entering the potable water supply due to backsiphonage.

It is ideal for continuous pressure health hazard applications, such as irrigation systems and industrial process water systems, particularly where exposure to sudden freezing conditions can occur.

Freeze Protection Features

  • Features a unique built-in relief valve that relieves pressure caused by ice formation, protecting the valve body and internal components during sudden freeze conditions.
  • Water inside the PVB freezes from the outside-inward, and as ice forms and expands, the relief valve, built into the plastic float, automatically relieves pressure.
  • The relief valve is designed to be repeatable and automatically re-seats when pressure within the valve is below its set point, and will not discharge during normal operation.

Construction & Design

  • Constructed with Lead Free* cast silicon copper alloy body and Lead Free* materials to comply with installation requirements.
  • Equipped with quarter-turn ball valve shutoffs featuring lever handles.
  • Test cocks are positioned at the lowest point of the valve for easy testing and winterization draining.
  • Designed for easy maintenance of internal parts with no special tools required for servicing.
  • Features a compact, space-saving design.
  • Includes a silicone seat disc for durability and an O-ring bonnet seal for less possibility of fouling.
  • Internal parts are serviceable in-line from the top of the unit.

Note: The built-in relief valve is not designed to provide freeze protection for the entire irrigation system.

Specifications

General

  • Product Type: Pressure Vacuum Breaker (PVB)
  • Series: LF767FR
  • Nominal Size: 1 inch
  • Body Material: Lead Free* Cast Silicon Copper Alloy
  • Connections: Female NPT Inlet and Outlet
  • Minimum Working Pressure: 15 psi (103 kPa)
  • Maximum Working Pressure: 150 psi (10.3 bar)
  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)

Component Materials

  • Springs: Stainless Steel
  • Bonnet: Celcon®
  • Vent Disc: Silicone Rubber
  • Disc Holder Float: Polypropylene
  • Check Valve Disc: Silicone Rubber
  • Check Valve Seat: Noryl Plastic
  • Bonnet Seal: Silicone Rubber O-ring

Dimensions (Approximate for 1 inch size)

  • Overall Length (A): 7 1/2 inches (191 mm)
  • Overall Height (B): 7 1/2 inches (191 mm)
  • Depth (E, from centerline to valve end): 4 7/8 inches (124 mm)
  • Weight: 6 lbs (2.7 kg)

Certificates & Approvals

  • ASSE 1020
  • CSA B64.1.2
  • UPC
  • NSF Certified to NSF/ANSI 372
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California, Manual Section 10

FAQs

What is the primary purpose of the FEBCO LF767FR pressure vacuum breaker?

The primary purpose is to prevent backsiphonage of contaminated water from entering the potable water supply, especially in continuous pressure systems.

What makes this PVB "freeze-resistant"?

The LF767FR features a unique built-in relief valve that relieves pressure caused by ice formation, protecting the valve body and internal components from damage during freezing conditions.

What are the connection types and sizes for this specific model?

This 1 inch model features female NPT (National Pipe Taper) inlet and outlet connections, equipped with quarter-turn lever handle shutoffs.

What are the minimum and maximum operating pressure ratings for this device?

The minimum working pressure is 15 psi (103 kPa), and the maximum working pressure is 150 psi (10.3 bar).

Is the LF767FR certified as Lead Free?

Yes, the LF767FR is constructed using Lead Free* materials, meaning the wetted surface contains less than 0.25% lead by weight, complying with Lead Free* installation requirements.