The Wilkins 12-NR3XLDULU is a lead-free water pressure reducing valve with integral by-pass check valve and strainer, designed for residential and commercial applications.

Key Specifications:

• Size: 1/2 Inches
• Maximum Working Water Pressure: 400 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: ASSE 1003, IAPMO, CSA, NSF/ANSI/CAN 61
• Connection Type: 2 Integral FNPT

Other Related Variants:

• 34-NR3XLDULU: 3/4 Inches model size
• 1-NR3XLDULU: 1 Inches model size
• 114-NR3XLDULU: 1 1/4 Inches model size
• 112-NR3XLDULU: 1 1/2 Inches model size
• 2-NR3XLDULU: 2 Inches model size

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B 584
• Bell housing: UV resistant polymer composite
• Internals: 300 Series Stainless Steel
• Stem: Low Lead Brass
• Elastomers: EPDM (FDA approved)
• Elastomers: Buna Nitrile (FDA approved)
• Cartridge: Delrin™
• Springs: 302 Stainless Steel
• Strainer screen: 300 Series Stainless Steel

Typical Installation:

The Model NR3XL may be installed in any position. The assembly shall be installed with sufficient side clearance for testing and maintenance. Multiple installations are recommended for wide demand variations or where the desired pressure reduction is more than 4 to 1. Anytime a reducing valve is adjusted, a pressure gauge must be used downstream to verify correct pressure setting. Do not bottom adjustment bolt on bell housing. Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted in accordance with the latest edition of the Uniform Plumbing Code.

Standards Compliance:

ASSE Listed 1003; IAPMO Listed; CSA Certified; NSF/ANSI/CAN 61 (0.25% Max Weighted Average Lead Content)

Features & Benefits:

• Integral By-Pass Check Valve: Prevents buildup of excessive system pressure caused by thermal expansion, providing comprehensive system protection.
• Balance Piston Design: Enables smooth and responsive reaction to changes in system flow demand while providing protection from inlet pressure changes.
• Integral Strainer: Makes the Zurn 12-NR3XLDULU most suitable for residential and commercial water systems requiring frequent cleaning of sediment and debris.
• Lead-Free Certified Construction: The Zurn 12-NR3XLDULU meets NSF/ANSI/CAN 61 requirements with 0.25% maximum weighted average lead content, ideal for potable water applications.

FAQ

Q: Can the 12-NR3XLDULU be installed in any orientation?

A: Yes, the Model NR3XL may be installed in any position. However, sufficient side clearance must be provided for testing and maintenance.

Q: What pressure reduction ratio is recommended for this valve?

A: The valve is recommended for pressure reductions not exceeding a 4:1 ratio. For greater reductions, multiple installations are recommended.

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

A: Always use a downstream pressure gauge when adjusting the valve. The factory preset is 50 psi with an adjustable range of 15-75 psi. Do not bottom the adjustment bolt on the bell housing.

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