The Wilkins 1-500XL is a water pressure reducing valve with integral by-pass check valve designed for industrial and commercial water systems requiring reliable pressure control and protection from thermal expansion.

Key Specifications:

• Size: 1 Inches
• Maximum Working Pressure: 300 psi
• Maximum Working Temperature: 140°F
• Notable Certifications: ASSE 1003, cUPC, CSA B356
• Threaded connections (FNPT): ANSI B1.20.1
  

Other Related Variants:

• 12-500XL: 1/2 Inch version
• 34-500XL: 3/4 Inch version
• 114-500XL: 1 1/4 Inch version
• 112-500XL: 1 1/2 Inch version
• 212-500XL: 2 1/2 Inch version
• 3-500XL: 3 Inch version

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B 584
• Access covers: Low Lead Cast Bronze ASTM B 584 and Low Lead Brass
• Fasteners: Stainless Steel, 300 series
• Stem & plunger: Low Lead Cast Bronze ASTM B 584 and Low Lead Brass
• Elastomers: Buna Nitrile (FDA approved) and EPDM (FDA approved)
• Cap gaskets: Natural vulcanized fibre and 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 Zurn 1-500XL 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 (i.e.: 150 psi inlet reduced to 50 psi outlet). Anytime a reducing valve is adjusted, a pressure gauge must be used downstream to verify correct pressure setting.

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 and 372

Features & Benefits:

• High Flow Capacity: Designed for industrial water lines and commercial water systems with superior flow performance.
• Thermal Expansion Protection: Direct acting integral by-pass design prevents buildup of excessive system pressure caused by thermal expansion.
• Balanced Piston Design: Enables smooth and responsive reaction to changes in system flow demand while providing protection from inlet pressure changes.
• Flexible Installation: Can be installed in any position with accessible maintenance without removing the body from the line.

FAQ

Q: Can the Wilkins 1-500XL be installed in any orientation?

A: Yes, the Zurn 1-500XL may be installed in any position. However, if installed in a pit, vault, or inside application, the "SC" sealed cage option should be specified.

Q: What is the factory preset pressure for this valve?

A: The valve comes factory preset at 50 psi and has a reduced pressure range of 25 psi to 75 psi. The pressure can be field adjusted using a downstream gauge.

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 (for example: 150 psi inlet reduced to 50 psi outlet).

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