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The Wilkins ZW4004SS-T is a 2-1/2" Pressure-Tru™ automatic fire control pressure reducing valve designed for automatic sprinkler and standpipe systems with integrated supervisory switch monitoring.

Key Specifications:

• Size: 2 1/2 Inches
• Maximum Inlet Pressure: 400 psi
• Valve Configuration: Angle type (standard)
• Notable Certifications: UL, C-UL, NYC MEA 325-06-E, California State Fire Marshal
• End Connections: FNPT ANSI B1.20.1

Other Related Variants:

• ZW4004SS-R: Pressure setting R configuration
• ZW4004SS-S: Pressure setting S configuration
• ZW4004SS-U: Pressure setting U configuration

Materials:

• Cast bronze ASTM B 584 castings and internals
• Buna Nitrile elastomers (FDA approved)
• EPDM elastomers (FDA approved)

Typical Installation:

The Wilkins ZW4004SS-T is listed as a floor control valve, indicating valve, and check valve in automatic sprinkler systems as well as a standpipe valve for CLASS I and CLASS III systems.

Standards Compliance:

UL Listed; C-UL Listed; NYC MEA 325-06-E; City of Los Angeles Approved; California State Fire Marshal Listed

Features & Benefits:

• Dual Condition Regulation: Regulates pressure under both flow and no-flow conditions ensuring consistent system performance.
• Integrated Supervisory Switch: Factory-installed supervisory switch (3 A @ 125 VAC) with tamper-resistant cover provides valve position monitoring for enhanced safety.
• Factory-Set Precision: Non-field adjustable factory set pressure profile T eliminates installation errors and ensures reliable performance.
• Complete Monitoring Package: Tapped and plugged inlet and outlet gauge ports allow for easy pressure verification and system diagnostics.

FAQ

Q: What does the "T" designation in the Zurn ZW4004SS-T model number indicate?

A: The "T" suffix indicates the factory-set pressure profile for this valve. The Zurn ZW4004SS-T comes with a specific downstream pressure setting that is non-field adjustable, ensuring consistent performance for its designed application.

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

A: No, the ZW4004SS-T is factory-set and non-field adjustable to ensure proper performance and compliance with fire protection standards. If a different pressure profile is needed, you must select the appropriate model variant (R, S, or U setting).

Q: What is the purpose of the integral supervisory switch?

A: The supervisory switch monitors valve position and provides an electrical signal (rated 3 amps @ 125 VAC) to the fire alarm control panel, alerting facility personnel if the valve is closed or tampered with, ensuring continuous fire protection system readiness.

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