The Wilkins 112-ZW209BP is a pilot-operated pressure reducing valve with integrated low-flow bypass designed for reliable pressure control in commercial and industrial water systems.

Key Specifications:

• Size: 1 1/2 Inches
• Pressure Range: 15–120 psi adjustable
• Temperature Rating: 33°F to 140°F
• Notable Certifications: NSF/ANSI/CAN 61; ANSI/AWWA C530
• End Connections: ANSI Class 150 Flanges

Other Related Variants:

• 2-ZW209BP: 2 Inches valve size
• 212-ZW209BP: 2 1/2 Inches valve size
• 3-ZW209BP: 3 Inches valve size
• 4-ZW209BP: 4 Inches valve size

Materials:

• Main valve body: Ductile iron ASTM A536
• Main valve bonnet: Ductile iron ASTM A536
• Disc guide: Stainless steel
• Seat: Stainless steel
• Disc: Buna-N rubber
• Diaphragm: Nylon reinforced Buna-N
• Stem: Stainless steel
• Spring: Stainless steel
• Blue epoxy coating (FDA approved)
• Copper tubing and brass fittings

Typical Installation:

The Zurn 112-ZW209BP is commonly used in buildings where 1-15 GPM low flows are common during off-peak usage. The valve is designed for applications requiring reduction of high inlet pressures to safe and stable outlet pressures while handling very low flows up to 10 GPM through the integrated bypass when there is off-peak demand. Recommended installation orientation is horizontal with valve cover up.

Standards Compliance:

ANSI/AWWA C530; NSF/ANSI/CAN 61 (0.25% max. weighted average lead content)

Features & Benefits:

• Integrated Low-Flow Bypass: Handles flows up to 10 GPM during off-peak demand without requiring separate bypass installation for low-flow applications.
• Complete Control Package: Includes wye strainer, isolation valves, inlet/outlet pressure gauges, and pilot assembly for immediate installation and easy maintenance.
• Corrosion-Resistant Construction: Blue epoxy coating on all internal and external ferrous surfaces with stainless steel trim ensures long service life and durability.
• Precise Pressure Control: Pilot assembly reacts to downstream pressure changes, modulating the main valve to maintain constant outlet pressure between 15-120 psi.

FAQ

Q: What is the minimum inlet pressure required for the Wilkins 112-ZW209BP?

A: The minimum inlet pressure is 10 psi higher than the set point or the additional body friction loss at intended flow, whichever is higher.

Q: Can this valve handle all low-flow applications without an additional bypass?

A: The integrated bypass handles flows up to 10 GPM. For applications requiring flows between the bypass maximum and main valve minimum continuous flow (10 GPM for 1 1/2" size), an additional bypass valve may be needed to ensure smooth flow response.

Q: What is the recommended installation orientation?

A: The recommended installation orientation is horizontal with the valve cover up to ensure proper air bleeding and ease of maintenance.

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