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The Wilkins ZW4004ILGSS-R is a 2 1/2" Pressure-Tru™ automatic fire control pressure reducing valve designed for reliable pressure regulation in automatic sprinkler and standpipe systems.

Key Specifications:

• Size: 2 1/2 Inches
• Maximum Inlet Pressure: 400 psi
• Connection Type: Grooved inlet and outlet
• Notable Certifications: UL, C-UL, NYC MEA
• Flow Capacity: Up to 500 GPM

Other Related Variants:

• ZW4004ILGSS-S: Pressure setting S
• ZW4004ILGSS-T: Pressure setting T
• ZW4004ILGSS-U: Pressure setting U

Materials:

• Cast bronze body - ASTM B 584
• Buna Nitrile elastomers - FDA approved
• EPDM elastomers - FDA approved

Typical Installation:

The Zurn ZW4004ILGSS-R is listed as a floor control valve, an indicating valve, and a check valve in automatic sprinkler systems as well as a standpipe valve for CLASS I and CLASS III systems. It regulates pressure under both flow and no-flow conditions.

Standards Compliance:

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

Features & Benefits:

• Accurate Pressure Control: Regulates pressure under both flow and no-flow conditions for consistent system performance.
• Factory Set Non-Adjustable: Pre-calibrated pressure profile R eliminates field adjustment needs and ensures reliable operation.
• Integrated Supervisory Switch: Built-in listed supervisory switch with 3A @ 125 VAC rating provides valve position monitoring and tamper-resistant cover for enhanced security.
• Grooved Connections: AWWA C606 grooved inlet and outlet connections allow for faster installation and easy maintenance access.

FAQ

Q: What is the difference between pressure profile settings R, S, T, and U?

A: Each pressure profile (R, S, T, U) is factory set to deliver different outlet pressure ranges at various inlet pressures and flow rates. Profile R has a maximum inlet pressure of 290 psi. Refer to the residual pressure charts to select the appropriate profile for your specific system requirements based on required GPM and inlet/outlet pressures.

Q: Can this valve be field-adjusted after installation?

A: No, the Wilkins ZW4004ILGSS-R is non-field adjustable and comes factory set to pressure profile R. This ensures consistent, reliable performance and maintains listing compliance. If a different pressure setting is required, you must order the appropriate model variant.

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

A: The integral listed supervisory switch monitors the valve position and provides a contact rating of 3 amps @ 125 VAC. It alerts building management systems when the valve is tampered with or closed, ensuring compliance with fire safety monitoring requirements and preventing unauthorized valve closure.

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