Wilkins 8" 450 OS&Y Gate Valves

Item Number: 8-450OSY
1 1
$30,319.39
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 8 inch
  • Weight: 890.0 lb
  • Device Type: Double Check Valve Backflow Assembly
  • Valve Type: OS&Y Gate Valves (resilient wedged)
  • End Connections: Flanged
  • Body Material: Epoxy-coated ductile iron
  • Maximum Working Pressure: 175 PSI
  • Certifications: ASSE® Listed 1015, CSA B64.4, NSF/ANSI/CAN 61*
  • Configuration: "N" Pattern for compact installations
  • Lead-Free Compliant

Description

The Wilkins 8 inch Model 450 Double Check Valve Backflow Assembly with OS&Y Gate Valves is designed to prevent backflow of polluted water in potable water supply lines for low health hazard applications. This device features an epoxy-coated ductile iron body and access covers, stainless steel fasteners, and EPDM elastomers. It includes resilient wedged OS&Y gate valves with flanged connections and an "N" pattern configuration, making it suitable for compact installations. Certified to ASSE 1015, CSA B64.4, and NSF/ANSI/CAN 61*, this lead-free compliant assembly offers reliable protection and easy maintenance.

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Connection Information

The Wilkins 8 inch Model 450 Double Check Valve Backflow Assembly features flanged end connections. It is supplied with OS&Y (Outside Stem & Yoke) resilient wedged gate valves which are also epoxy-coated cast iron. This configuration allows for secure integration into existing flanged piping systems, typically in a horizontal "N" pattern for compact installation footprints.

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Additional Details

The Wilkins 8 inch Model 450 Double Check Valve Backflow Assembly with OS&Y Gate Valves is designed for new installations or replacements, protecting potable water supplies from backflow of polluted water in low health hazard applications.

This epoxy-coated ductile iron device features an "N" Pattern configuration for compact spaces and comes equipped with durable OS&Y (Outside Stem & Yoke) resilient wedged gate valves.

Features

  • Designed for low health hazard applications to protect potable water.
  • "N" Pattern configuration is ideal for new and retrofit installations in compact locations.
  • Equipped with OS&Y (Outside Stem & Yoke) gate valves for reliable shut-off.
  • Patented center-stem guided Compound Check provides low headloss and superior performance.
  • Convenient single access cover reduces maintenance downtime.
  • Lead-free compliant construction.

Construction & Materials

  • Main Body & Access Covers: Corrosion-resistant, epoxy-coated ductile iron (ASTM A536 Grade 4).
  • Gate Valves: Epoxy-coated cast iron series 408 resilient wedged OS&Y valves.
  • Fasteners & Springs: Stainless Steel, 300 Series.
  • Seat Ring & Check Valve: NORYL™.
  • Stem: Stainless steel (ASTM A276).
  • Seat Disc Elastomers: EPDM (FDA approved).

Specifications

  • Model: 450
  • Size: 8 inch
  • End Connections: Flanged
  • Maximum Working Water Pressure: 175 PSI
  • Hydrostatic Test Pressure: 350 PSI
  • Main Body & Access Cover Material: Ductile Iron (ASTM A536 Grade 4)
  • Coating: FDA approved fusion epoxy finish
  • Fasteners: Stainless Steel, 300 Series
  • Elastomers: EPDM (FDA approved), Buna Nitrile (FDA approved)
  • Polymers: NORYL™
  • Springs: Stainless Steel, 300 Series
  • Stem Material: Stainless steel (ASTM A276)
  • Gate Valves: OS&Y (Outside Stem & Yoke) resilient wedged, epoxy-coated cast iron
  • Approximate Weight (Flanged): 838 lbs
  • Approximate Width (with gate valves): 47 inches (1194 mm)

Certificates & Approvals

  • ASSE® Listed 1015
  • IAPMO® Listed
  • CSA B64.4
  • AWWA C510 and C550
  • UL Classified
  • C-UL Classified
  • FM Approved
  • NYC MEA 213-99-M VOL 3
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • Meets Requirements of NSF/ANSI/CAN 61* (MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What is the primary application of the Wilkins 8" Model 450 Double Check Valve Assembly?

The Wilkins Model 450 is designed for installation on potable water lines to protect against backsiphonage and backpressure of polluted water, specifically in low health hazard applications where a potential health hazard does not exist.

What are the key materials used in the construction of this backflow preventer?

The main body and access covers are made of epoxy-coated ductile iron. It features stainless steel fasteners and springs, NORYL™ for the seat ring and check valve, and EPDM (FDA approved) for the seat disc elastomers. The gate valves are epoxy-coated cast iron.

What type of end connections does the 8" Model 450 have?

The Wilkins 8" Model 450 Double Check Valve Assembly features flanged end connections, providing a secure and robust connection to existing piping systems.

What certifications does the Wilkins Model 450 hold?

This backflow preventer is ASSE® Listed 1015, IAPMO® Listed, CSA B64.4, AWWA C510 and C550, UL Classified, C-UL Classified, FM Approved, and meets NSF/ANSI/CAN 61* requirements for lead content.

Is the 8" Model 450 suitable for installations in confined spaces?

Yes, the Model 450 features an "N" Pattern configuration, which is specifically designed to be ideal for new and retrofit installations in compact locations.

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