The Wilkins 2-ZW209TH is a pilot-operated pressure reducing valve designed to maintain stable downstream pressure independent of flow rate in high-pressure applications.

Key Specifications:

• Size: 2 Inches
• Maximum Inlet Pressure: 400 psi threaded rating
• Temperature Rating: 33°F to 140°F
• Notable Certifications: NSF/ANSI/CAN 61; ANSI/AWWA C530
• End Connections: NPT Threaded (TH)

Other Related Variants:

• 112-ZW209TH: 1 1/2 Inches threaded version

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
• Epoxy Coating: FDA Approved
• Tubing: Copper
• Fittings: Brass

Typical Installation:

The recommended installation orientation is horizontal with the valve cover up. 6" 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.

Standards Compliance:

ANSI/AWWA C530; NSF/ANSI/CAN 61 (0.25% Max. Weighted Average Lead Content)

Features & Benefits:

• Stable Pressure Control: Pilot assembly reacts to downstream pressure changes, maintaining constant set pressure regardless of flow rate or inlet pressure variations.
• Corrosion Protection: Epoxy-coated ductile iron body (internal and external) provides FDA-approved corrosion resistance and extended service life.
• Easy Maintenance: Includes standard isolation valves, wye-type strainer, and inlet/outlet pressure gauges for quick service and troubleshooting.
• Wide Pressure Range: Field-adjustable pilot control operates from 15 to 120 psi with maximum inlet pressure up to 400 psi for threaded connections.

FAQ

Q: What is the adjustable downstream pressure range for the Zurn 2-ZW209TH?

A: The standard pilot spring range is field-adjustable from 15 to 120 psi. Optional low-pressure (5-25 psi) and high-pressure (30-300 psi) pilot assemblies are available.

Q: What is the minimum inlet pressure required for proper operation?

A: 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 the Zurn 2-ZW209TH be installed vertically?

A: While smaller sizes can be installed vertically, the recommended orientation is horizontal with the valve cover up for easier maintenance and air bleeding. 6" and larger valves should only be installed horizontally.

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