NOTICE: Product images may vary from the actual item due to differences in size or configuration options.

The Wilkins 4-ZW209 is a pilot-operated pressure reducing valve designed to reduce high inlet pressures to safe, stable outlet pressures in commercial and industrial water applications.

Key Specifications:

• Valve Size: 4 Inches
• Pilot Adjustable Pressure Range: 15–120 psi
• Temperature Rating: 33°F to 140°F
• Notable Certifications: NSF/ANSI/CAN 61, ANSI/AWWA C530
• End Connections: ANSI Class 150 Flanged

Other Related Variants:

• 212-ZW209: 2 1/2 Inch valve size
• 2-ZW209: 2 Inch valve size
• 3-ZW209: 3 Inch valve size
• 6-ZW209: 6 Inch valve size
• 8-ZW209: 8 Inch 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
• Coating: Fusion Epoxy (FDA Approved)

Typical Installation:

The recommended installation orientation for the Zurn 4-ZW209 is horizontal, with the valve cover up. 6 inch and larger valves should only be installed horizontally, with the valve cover up, due to the difficulty of properly bleeding air out of the cover and performing maintenance on valves installed in the vertical orientation. The valve should be installed with inlet and outlet shut-off valves for maintenance purposes.

Standards Compliance:

ANSI/AWWA C530; NSF/ANSI/CAN 61 (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

Features & Benefits:

• Stable Pressure Regulation: The Wilkins 4-ZW209 pilot assembly reacts to downstream pressure changes, modulating the main valve to ensure constant outlet pressure independent of flow rate.
• Comprehensive Package: Includes pilot assembly, wye strainer, isolation valves, and inlet/outlet pressure gauges for complete installation and easy maintenance.
• Corrosion Protection: FDA-approved fusion epoxy coating on all internal and external ferrous surfaces ensures durability and long service life.
• Stainless Steel Trim: Stainless steel seat, disc guide, stem, and spring provide superior wear resistance and reliability in demanding applications.

FAQ

Q: What is the minimum inlet pressure required for the 4-ZW209?

A: The minimum inlet pressure is 10 psi plus the desired outlet pressure or the friction loss at intended flow, whichever is higher.

Q: Can the pilot pressure be adjusted in the field?

A: Yes, the pilot spring is field adjustable from 15 psi to 120 psi for precise pressure control tailored to your application requirements.

Q: What size options are available for the Model ZW209?

A: The Model ZW209 is available in sizes ranging from 1 1/4 inches to 16 inches with threaded, flanged, and grooved end connections to suit various installation requirements.

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