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The Wilkins 112-ZW209TH is a pilot-operated pressure reducing valve with NPT threaded connections, designed to maintain stable downstream pressure in commercial and industrial water systems.

Key Specifications:

• Size: 1 1/2 Inches
• Maximum Inlet Pressure: 400 PSI threaded
• Temperature Rating: 33°F to 140°F
• Notable Certifications: NSF/ANSI/CAN 61
• Pilot Spring Range: 15-120 PSI

Other Related Variants:

• 2-ZW209TH: 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
• Tubing: Copper
• Fittings: Brass
• Coating: FDA Approved Epoxy

Typical Installation:

The recommended installation orientation for the Zurn 112-ZW209TH is horizontal with the valve cover up, with inlet and outlet shut-off valves installed on both sides for proper maintenance and system isolation.

Standards Compliance:

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

Features & Benefits:

• Stable Pressure Control: Pilot-operated design maintains constant downstream pressure independent of flow rate or inlet pressure variations.
• Corrosion Protection: FDA-approved epoxy coating on all internal and external ferrous surfaces ensures long-lasting durability in water applications.
• Easy Maintenance: Includes standard isolation valves, strainer, and pressure gauges for quick servicing without system shutdown.
• Guided Stem Design: Top and bottom stem guidance with diaphragm not used as seating surface ensures reliable, leak-free operation.

FAQ

Q: What is the minimum inlet pressure required for the Wilkins 112-ZW209TH?

A: The minimum inlet pressure is 10 PSI plus the body friction loss at the intended flow rate, or 10 PSI higher than the set point, whichever is greater.

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

A: Yes, the pilot control is field adjustable from 15 PSI to 120 PSI using the adjustable spring mechanism on the PRXL pressure reducing pilot.

Q: What end connection type does the 112-ZW209TH have?

A: The "TH" suffix indicates NPT threaded end connections with a maximum pressure rating of 400 PSI for threaded configurations in the 1-1/2 Inches size.

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