The Wilkins 1-NR3XL is a water pressure reducing valve with integral by-pass check valve and strainer, designed to reduce high inlet pressure to lower outlet pressure while preventing thermal expansion buildup in residential and commercial systems.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 400 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: ASSE 1003, IAPMO, CSA
• Threaded Connections: FNPT ANSI B1.20.1
  

Other Related Variants:

• 12-NR3XL: 1/2 Inch version
• 34-NR3XL: 3/4 Inch version
• 114-NR3XL: 1 1/4 Inches version
• 112-NR3XL: 1 1/2 Inches version
• 2-NR3XL: 2 Inches version

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. A pressure gauge must be used downstream to verify correct pressure setting. Do not bottom adjustment bolt on bell housing.

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.
• Balance Piston Design: Provides smooth and responsive reaction to changes in system flow demand while protecting from inlet pressure changes.
• Sealed Cage Construction: Stainless steel adjustment bolt and nut improve corrosion resistance for all applications including below-ground pit installation.
• Integral Strainer: Built-in strainer makes the Zurn 1-NR3XL ideal for frequent cleaning of sediment and debris in residential and commercial systems.

FAQ

Q: What is the reduced pressure range for the Wilkins 1-NR3XL?

A: The reduced pressure range is 15 to 75 psi, with a factory preset of 50 psi.

Q: Can the Zurn 1-NR3XL be installed in any orientation?

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

Q: When should multiple NR3XL valves be installed?

A: Multiple installations are recommended for wide demand variations or where the desired pressure reduction exceeds a 4:1 ratio (e.g., 200 psi inlet reduced to 50 psi outlet).

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