The Wilkins 12-NR3XLDULUP is a 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
• Connection Type: 2 Integral FNPT

Other Related Variants:

• 34-NR3XLDULUP: 3/4 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:

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. 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 (ie: 200 psi inlet reduced to 50 psi outlet).

Standards Compliance:

ASSE Listed 1003; IAPMO Listed; CSA Certified; NSF/ANSI/CAN 61

Features & Benefits:

• Integral Strainer: Built-in strainer makes this device ideal for residential and commercial water systems requiring frequent cleaning of sediment and debris.
• 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.
• Corrosion Resistant Construction: Sealed cage washer and stainless steel adjustment components improve corrosion resistance for all applications including below-ground pit installation.

FAQ

Q: Can the Zurn 12-NR3XLDULUP be installed in any position?

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 the Wilkins 12-NR3XLDULUP?

A: Multiple installations are recommended for wide demand variations or where the desired pressure reduction is more than 4 to 1 (for example: 200 psi inlet reduced to 50 psi outlet).

Q: How do I adjust the pressure setting on the Zurn 12-NR3XLDULUP?

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

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