The Wilkins 3-500XLHR is a water pressure reducing valve with integral by-pass check valve designed for commercial and industrial applications requiring reliable pressure control and thermal expansion protection.

Key Specifications:

• Size: 3 Inches
• Maximum Working Water Pressure: 300 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: NSF/ANSI/CAN 61 & 372
• Pressure Range (HR Option): 75-125 psi, set 85 psi

Other Related Variants:

• 112-500XLHR: 1 1/2 Inches model
• 114-500XLHR: 1 1/4 Inches model
• 1-500XLHR: 1 Inch model
• 212-500XLHR: 2 1/2 Inches model
• 2-500XLHR: 2 Inches model

Materials:

• Body: Low Lead Cast Bronze ASTM B 584
• Access Covers: Low Lead Cast Bronze ASTM B 584 / Low Lead Brass
• Fasteners: Stainless Steel, 300 Series
• Stem & Plunger: Low Lead Cast Bronze ASTM B 584 / Low Lead Brass
• Elastomers: Buna Nitrile (FDA approved) / EPDM (FDA approved)
• Cap Gaskets: Natural Vulcanized Fibre / Acetal (Delrin™ 500)
• Springs: Oil Tempered Wire, ASTM A 229
• Seat: Stainless Steel, 300 Series

Typical Installation:

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted in accordance with the manufacturers' instructions and the latest edition of the Uniform Plumbing Code. The assembly shall be installed with sufficient side clearance for testing and maintenance. The Model 500XL may be installed in any position. If installed in a pit, vault, or inside application, specify the "SC" sealed cage option. Multiple installations are recommend for wide demand variations or where the desired pressure reduction is more than 3 to 1. A downstream pressure gauge must be used for adjustment. Do not bottom adjustment bolt on bell housing.

Standards Compliance:

ASSE Listed 1003 (1/2" thru 2 1/2"); cUPC Listed (1/2" thru 2"); CSA Certified B356 (1/2" thru 2"); City of Los Angeles Approved (1/2" thru 2"); NSF/ANSI/CAN 61 & 372

Features & Benefits:

• High Pressure Range: The Zurn 3-500XLHR HR option provides 75-125 psi spring range, ideal for high pressure applications requiring precise control.
• Thermal Expansion Protection: Direct acting integral by-pass design prevents buildup of excessive system pressure caused by thermal expansion.
• Balanced Piston Design: Provides smooth and responsive reaction to system flow demand changes while protecting from inlet pressure variations.
• Low Lead Compliance: Meets NSF/ANSI/CAN 372 with less than 0.25% weighted average lead content for safe potable water applications.

FAQ

Q: Can the Wilkins 3-500XLHR be installed in any position?

A: Yes, the Model 500XL may be installed in any position. For pit or vault installations, the "SC" sealed cage option is recommended.

Q: What is the difference between the HR option and standard spring range?

A: The HR option provides a higher spring range of 75-125 psi (factory set at 85 psi) compared to the standard 25-75 psi range, making the Zurn 3-500XLHR suitable for higher pressure applications.

Q: What is the maximum pressure reduction ratio recommended?

A: Multiple installations are recommended where the desired pressure reduction is more than 3 to 1 (e.g., 150 psi inlet reduced to 50 psi outlet) for optimal performance.

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