4 450 DC SS BODY BFLY GRV X GRV

Item Number: 4-450STBG
1 1
$12,814.70
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 4 inch
  • Body Material: 304L Stainless Steel
  • End Connections: Grooved Butterfly Valves
  • Maximum Working Water Pressure: 175 psi
  • Lead-Free: Yes (NSF/ANSI/CAN 61)
  • Approved: ASSE® Listed 1015, CSA B64.5, FM Approved
  • Corrosion-resistant stainless steel body
  • Ultra-low pressure drop with patented compound checks

Description

The Wilkins 450ST Double Check Valve Assembly is a 4-inch lead-free backflow preventer designed for new installations and direct replacement on potable water lines. It effectively protects against backsiphonage and backpressure of polluted water. Featuring a corrosion-resistant 304L stainless steel body and grooved end butterfly valves with integral supervisory switches, this assembly ensures durability and easy maintenance. Its patented compound checks provide ultra-low pressure drop. The compact design allows for simplified installation, eliminating the need for concrete thrust blocks. Approved by ASSE, AWWA, UL, C-UL, FM, and CSA B64.5. Item number 4-450STBG.

Help Me Connect

This 4-inch Wilkins 450ST Double Check Valve Assembly is equipped with grooved end butterfly valves, designed for connections to steel pipe with grooved ends. It is built to AWWA C606 standards for grooved connections. The integral supervisory switches ensure reliable monitoring of the shut-off valve status, making it suitable for applications requiring monitored connections.

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Additional Details

The Wilkins 450ST Double Check Valve Assembly provides crucial protection for potable water lines, preventing both backsiphonage and backpressure of polluted water into the supply. This 4-inch valve is designed for direct drop-in replacement or new installations where lead-free solutions are required.

Application & Protection

  • Designed for drop-in replacement of competitor valves or new installation on potable water lines.
  • Protects against both backsiphonage and backpressure of polluted water.
  • Provides protection where a potential health hazard does not exist.
  • Ideal for use where lead-free valves are required.

Features

  • Superior stainless steel body resists corrosion and extends product life.
  • Small, compact footprint allows for direct drop-in replacement.
  • Time-tested check and relief valve components ensure easy maintenance and increased water system uptime.
  • Patented compound checks provide ultra-low pressure drop, reducing the need for a booster pump.
  • Patented AR spool facilitates drop-in replacements by matching lay-lengths of common n-pattern valves.
  • Checks are accessible for maintenance without removing the device from the line.
  • Backflow setter eliminates the need for concrete thrust blocks, allowing for easier installation and lower cost.

Materials

  • Main Valve Body: 304L Stainless steel
  • Access Covers: 304L Stainless steel
  • Internals: Stainless steel (300 Series) and NORYL™ (NSF Listed)
  • Fasteners and Springs: Stainless Steel (300 Series)
  • Seal Ring: EPDM (FDA approved)
  • O-Ring: Buna Nitrile (FDA approved)
  • Seat Disc Elastomers: EPDM
  • Stem: Stainless steel (ASTM A 276)

Specifications

  • Size: 4 inch
  • Product Type: Double Check Valve Assembly
  • Body Style: N-Pattern
  • Shut-Off Valves: Grooved End Butterfly Valves with Integral Supervisory Switches
  • Main Valve Body Material: 304L Stainless Steel
  • Access Cover Material: 304L Stainless Steel
  • Internals Material: Stainless steel (300 Series), NORYL™
  • Fasteners and Springs Material: Stainless Steel (300 Series)
  • Seal Ring Material: EPDM (FDA approved)
  • O-Ring Material: Buna Nitrile (FDA approved)
  • Seat Disc Elastomer Material: EPDM
  • Stem Material: Stainless steel (ASTM A 276)
  • Maximum Working Water Pressure: 175 psi
  • Minimum Working Water Pressure: 20 psi
  • Maximum Working Water Temperature: 140° F
  • Minimum Working Water Temperature: 33° F
  • Hydrostatic Test Pressure: 350 psi
  • Lead Content: 0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT

Connections

  • End Connections: Grooved for steel pipe
  • Connection Standard: AWWA C606
  • Flange Standard: ASME B16.42 Class 150 (where applicable)

Certificates & Approvals

  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • ASSE® Listed 1015
  • AWWA Compliant C510 (with gates only)
  • AWWA Compliant C550
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • CSA B64.5
  • Meets the requirements of NSF/ANSI/CAN 61

FAQs

What specific types of backflow does the Wilkins 450ST protect against?

The Wilkins 450ST Double Check Valve Assembly is designed to protect potable water lines from both backsiphonage and backpressure of polluted water, preventing contaminants from entering the clean water supply.

What are the main advantages of the stainless steel body?

The 304L stainless steel body of the 450ST provides superior resistance to corrosion, which significantly extends the operational life of the product and ensures reliability in various water conditions.

What types of connections does this 4-inch model support?

This 4-inch Wilkins 450ST model features grooved end butterfly valves with integral supervisory switches, making it suitable for secure, monitored connections to steel pipe with grooved ends, compliant with AWWA C606 standards.

Is this double check valve assembly considered lead-free?

Yes, the Wilkins 450ST meets the requirements of NSF/ANSI/CAN 61 and contains a maximum weighted average lead content of 0.25%, qualifying it as a lead-free valve.

Can the internal components be serviced without removing the entire device from the line?

Yes, a key feature of the Wilkins 450ST is that its checks are accessible for maintenance without requiring the removal of the entire device from the water line, simplifying service and reducing downtime.