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The Wilkins 34-500XLYSBR is a water pressure reducing valve with integral by-pass check valve, designed for potable water lines to reduce high inlet pressure to lower outlet pressure while preventing thermal expansion buildup.

Key Specifications:

• Size: 3/4 Inches
• Maximum Working Water Pressure: 300 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: ASSE 1003, cUPC, CSA B356
• Connection Type: Single Union FNPT

Other Related Variants:

• 112-500XLYSBR: 1 1/2 Inches model
• 114-500XLYSBR: 1 1/4 Inches model
• 212-500XLYSBR: 2 1/2 Inches model
• 2-500XLYSBR: 2 Inches model
• 3-500XLYSBR: 3 Inches model
• 1-500XLYSBR: 1 Inches model

Materials:

• Main valve body and access covers: Low Lead Cast Bronze ASTM B 584
• Fasteners: Stainless Steel, 300 series
• Stem and 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
• Strainer: Lead-Free Bronze

Typical Installation:

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 34-500XLYSBR 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; cUPC Listed; CSA Certified B356; City of Los Angeles Approved; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372

Features & Benefits:

• Balanced Piston Design: Smooth and responsive reaction to changes in system flow demand while providing protection from inlet pressure changes.
• Integral By-Pass Check Valve: Prevents buildup of excessive system pressure caused by thermal expansion.
• High Flow Capacity: Most suitable for industrial water lines and commercial water systems with field-adjustable pressure range from 25 to 75 psi.
• Lead-Free Bronze Y-Strainer (YSBR Option): Included on inlet for enhanced filtration and protection of internal components.

FAQ

Q: Can the Wilkins 34-500XLYSBR be installed in any orientation?

A: Yes, the Model 500XL may be installed in any position. If installed in a pit, vault, or inside application, specify the "SC" sealed cage option.

Q: What pressure reduction ratio is recommended for the Zurn 34-500XLYSBR?

A: Multiple installations are recommended 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).

Q: How do I adjust the downstream pressure on this valve?

A: Use a pressure gauge downstream to verify correct pressure setting. Adjust using the bolt on the bell housing, but do not bottom the adjustment bolt on bell housing.

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