2 LF767FR PVB

Item Number: 0683032
1 1
$1,974.01
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Size: 2 inch
  • Weight: 16.5 lb
  • Lead Free* construction
  • Freeze-resistant design with built-in relief valve
  • Maximum Working Pressure: 150 psi
  • Female NPT inlet and outlet with lever handle shutoffs
  • Internal parts serviceable in-line from top
  • Test cocks for easy winterization draining
  • ASSE 1020 approved

Description

The FEBCO Series LF767FR is a 2-inch lead-free, freeze-resistant pressure vacuum breaker backflow preventer designed to protect potable water supplies from backsiphonage of contaminated water. Its unique relief valve safeguards internal components and the valve body from freezing, making it ideal for irrigation and industrial process water systems. Featuring a durable silicon copper alloy body, stainless steel springs, and silicone rubber discs, this unit offers reliable performance up to 150 psi. It includes convenient lever handle shutoffs and test cocks for easy maintenance and winterization. Approved by ASSE 1020 and NSF/ANSI 372, this PVB ensures compliance and dependable backflow prevention.

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Installation Guidelines

  • This valve must be installed in a continuous pressure potable water supply system.
  • Ensure the supply is connected to the bottom of the valve, and the unit is mounted in a vertical position.
  • Maintain a minimum clearance of 12 inches (305mm) above the highest point of the downstream piping.
  • Do not install in areas prone to freezing or spillage; provide adequate drainage and freeze protection in cold climates.
  • A minimum of 1.5 psi (10 kPa) must be exerted against the float spring to ensure proper seal.
  • Avoid undersizing supply and discharge piping.
  • This vacuum breaker is not designed for protection against backpressure backflow or water hammer shock. For such protection, a Reduced Pressure Zone Backflow Preventer is required.

Freeze Protection Steps

  • Close the main shutoff valve.
  • Open the upstream drain, all test cocks, and isolation ball valves to depressurize the line.
  • Purge the system with air.
  • Leave test cock and isolation ball valve handles at a 45-degree angle to ensure proper drainage and prevent casting damage.
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Additional Details

This 2 inch Lead Free Freeze-Resistant Pressure Vacuum Breaker (PVB) is designed to prevent the reverse flow of polluted water due to backsiphonage into a potable water supply under continuous pressure.

Its superior design protects the valve body and internal components from damage during sudden freeze conditions, making it ideal for applications like irrigation systems and industrial process water systems.

Features & Benefits

  • Lead Free* construction for compliance with installation requirements.
  • Unique built-in relief valve automatically relieves pressure caused by ice formation and re-seats.
  • Equipped with lever handle shutoffs and test cocks for easy winterization draining.
  • Silicone rubber check valve disc and O-ring bonnet seal ensure durability and less possibility of fouling.
  • Internal parts are serviceable in-line from the top of the unit.
  • Compact space-saving design requires no special tools for servicing.

Design Details

  • The assembly incorporates an acetal bonnet with silicone rubber O-ring seal and silicone rubber seat disc.
  • Check assembly is guided over its full stroke by 'V' notch guides.
  • Includes a lightweight plastic disc float and replaceable plastic seat.
  • The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

NOTICE: Vacuum breakers are not designed to protect against backpressure backflow or water hammer shock. For backpressure protection, install a Reduced Pressure Zone Backflow Preventer.

Specifications

General

  • Product Type: Pressure Vacuum Breaker (PVB)
  • Size: 2 inch
  • Connection Type: Female NPT Inlet and Outlet
  • Working Pressure Range: 15 psi (103 kPa) minimum to 150 psi (10.3 bar) maximum
  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)

Materials

  • Body Material: Lead Free* cast silicon copper alloy
  • Springs: Stainless Steel
  • Bonnet: Celcon®
  • Vent Disc: Silicone Rubber
  • Disc Holder Float: Polypropylene
  • Check Valve Disc: Silicone Rubber
  • Check Valve Seat: Noryl Plastic

Certificates & Approvals

  • ASSE 1020
  • CSA B64.1.2US
  • 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 function of the FEBCO LF767FR pressure vacuum breaker?

The primary function of this 2-inch pressure vacuum breaker is to prevent the backsiphonage of contaminated water into the potable water supply, especially in continuous pressure systems.

Is this backflow preventer suitable for freezing conditions?

Yes, the LF767FR features a freeze-resistant design with a unique built-in relief valve that automatically relieves pressure caused by ice formation, protecting the valve body and internal components.

What are the key materials used in the construction of the LF767FR?

The body is made from Lead Free* cast silicon copper alloy. It includes stainless steel springs, a Celcon® bonnet, silicone rubber vent and check valve discs, and a Noryl plastic check valve seat.

What are the installation requirements for this pressure vacuum breaker?

It must be installed vertically, with the supply connected to the bottom, and at least 12 inches (305mm) above the highest point of downstream piping. It is crucial to provide adequate drainage and freeze protection in cold weather.

Can the LF767FR be used to protect against backpressure backflow?

No, vacuum breakers are not designed, tested, or approved to protect against backpressure backflow. For protection against backpressure backflow, a Reduced Pressure Zone Backflow Preventer should be installed.