4 475 RP SS BODY N PATTERN VERT OSY FLG X FLG

Item Number: 4-475STVOSY
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$15,517.41
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Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Product Type: Reduced Pressure Principle Assembly
  • Model: Wilkins 475STV
  • Nominal Size: 4 inch
  • Body Material: 304L Stainless steel
  • Shut-off Valves: OS&Y Gate Valves
  • End Connections: Flanged
  • Orientation: Vertical Up Flow (VUVU)
  • Maximum Working Pressure: 175 psi
  • Lead-Free: Yes

Description

The Wilkins 475STV 4 inch Reduced Pressure Principle Vertical Assembly is designed for vertical up flow installations, providing robust protection against backsiphonage and backpressure contamination in potable water lines. Featuring a superior 304L stainless steel body, this assembly resists corrosion and offers a smaller footprint for direct drop-in replacement. It includes OS&Y gate valves and flanged connections for reliable operation and easy maintenance. Patented compound checks ensure an ultra-low pressure drop. This lead-free unit is ASSE Listed 1013 and meets NSF/ANSI/CAN 61 requirements, ensuring high performance and extended product life. Item number 4-475STVOSY.

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Connections

  • The 4-inch 475STV assembly features flanged end connections, designed to connect to compatible flanged piping systems.
  • Ensure proper alignment and use appropriate gaskets and fasteners for a secure, leak-free installation.
  • This model includes OS&Y (Outside Stem & Yoke) Gate Valves for reliable shut-off functionality, integrating directly into the assembly for system isolation.

Installation Orientation

  • The 475STV is specifically designed for vertical up flow (VUVU) orientation, meaning water enters at the bottom and flows upwards through the assembly.
  • Refer to the installation instructions for precise mounting and clearance requirements to ensure optimal performance and accessibility for testing and maintenance.
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Additional Details

The Wilkins 475STV Stainless Steel n-Pattern Reduced Pressure Principle Vertical Assembly (RPV) is designed for installation in systems with vertical up flow and direct drop-in replacement. It provides protection for potable water lines against backsiphonage and backpressure of contaminated water.

Key Features

  • Superior 304L Stainless Steel Body resists corrosion and extends product life.
  • Reduced Pressure Principle Assembly provides protection against backsiphonage and backpressure contamination.
  • Designed for vertical up flow (VUVU) orientation, ideal for specific installation requirements.
  • Equipped with OS&Y Gate Valves for reliable shut-off.
  • Flanged end connections for easy installation.
  • Patented compound checks ensure ultra-low pressure drop, potentially reducing the need for a booster pump.
  • Smaller footprint for convenient direct drop-in replacement.
  • Time-tested check and relief valve components allow for easy maintenance and increased water system uptime.

Construction Materials

  • Main Valve Body: 304L Stainless steel
  • Access Covers: 304L Stainless steel
  • Coatings: FDA Approved electrostatic epoxy finish
  • Internals: Stainless steel, 300 Series, NORYLT™, NSF Listed
  • Fasteners & Springs: Stainless Steel, 300 Series
  • Seal Rings: EPDM (FDA approved)
  • O-rings: Buna Nitrile (FDA approved)
  • Sensing Line: Stainless Steel, braided hose

Specifications

  • Product Type: Reduced Pressure Principle Assembly
  • Model: 475STV
  • Nominal Size: 4 inch
  • Main Valve Body Material: 304L Stainless steel
  • Access Cover Material: 304L Stainless steel
  • Coating: FDA Approved electrostatic epoxy finish
  • Internal Materials: Stainless steel, 300 Series, NORYLT™, NSF Listed
  • Fastener & Spring Materials: Stainless Steel, 300 Series
  • Seal Ring Material: EPDM (FDA approved)
  • O-ring Material: Buna Nitrile (FDA approved)
  • Sensing Line Material: Stainless Steel, braided hose

Performance

  • Maximum Working Water Pressure: 175 psi
  • Minimum Working Water Pressure: 25 psi
  • Maximum Working Water Temperature: 140° F
  • Minimum Working Water Temperature: 33° F
  • Hydrostatic Test Pressure: 350 psi

Connections

  • End Connections: Flanged bolt pattern
  • End Connection Standard: ASME B16.42 Class 150
  • Shut-off Valves: OS&Y Gate Valves
  • Orientation: Vertical Up Flow (VUVU)

Dimensions & Weight (approximate)

  • Length (A): 14 inch (356 mm)
  • Length with Gate Valves (B): 29 7/8 inch (760 mm)
  • Length, OS&Y Closed (C): 18 1/4 inch (464 mm)
  • Depth (D): 9 inch (229 mm)
  • Height with NRS Gates (E): 18 3/8 inch (467 mm)
  • Weight (with OS&Y Gates, Flanged): 204 lbs (93 kg)

Certificates & Approvals

  • Approved by Foundation for Cross Connection Control and Hydraulic Research at USC (VUVD and VUVU orientations)
  • ASSE® Listed 1013
  • AWWA Compliant C511 (with gates only)
  • AWWA Compliant C550
  • CSA B64.4
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • Meets NSF/ANSI/CAN 61* (*0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What is the primary application of the Wilkins 475STV?

The Wilkins 475STV is designed to protect potable water lines from contamination due to backsiphonage and backpressure. It is specifically built for new installations or direct drop-in replacements in systems requiring vertical up flow.

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

The main valve body and access covers are made of 304L Stainless Steel for corrosion resistance. Internals are stainless steel, 300 Series, NORYLT™, and NSF Listed. Seal rings are EPDM, and O-rings are Buna Nitrile, both FDA approved.

What type of shut-off valves and end connections does this model use?

The 475STV (OSY FLG X FLG configuration) is equipped with OS&Y (Outside Stem & Yoke) Gate Valves and features flanged end connections.

What is the maximum operating pressure for the 475STV?

This Reduced Pressure Principle Assembly has a maximum working water pressure of 175 psi. It is also hydrostatically tested to 350 psi.

Is the Wilkins 475STV considered lead-free?

Yes, the Wilkins 475STV meets the requirements of NSF/ANSI/CAN 61, with a maximum weighted average lead content of 0.25%, making it compliant with lead-free standards.

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