The Wilkins ZW4004ILGSS-U is a UL Listed automatic fire control pressure reducing valve designed for fire sprinkler and standpipe systems, regulating pressure under both flow and no-flow conditions.

Key Specifications:

• Size: 2 1/2 Inches
• Maximum Inlet Pressure: 400 psi
• Notable Certifications: UL Listed, C-UL Listed, NYC MEA 325-06-E
• End Connections: Grooved inlet/outlet connections
• Configuration: In-line globe type body

Other Related Variants:

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

Materials:

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

Typical Installation:

The Zurn ZW4004ILGSS-U 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 where pressure regulation is required.

Standards Compliance:

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

Features & Benefits:

• Factory Set Non-Adjustable: Ensures consistent pressure control with factory calibrated settings that cannot be tampered with in the field.
• Integral Supervisory Switch: Built-in listed supervisory switch (3 A @ 125 VAC) monitors valve position and provides tamper-resistant protection.
• Dual Condition Regulation: Maintains accurate pressure regulation under both flowing and static conditions for optimal fire protection system performance.
• Grooved Connections: AWWA C606 grooved inlet and outlet connections allow for faster installation and system modifications.

FAQ

Q: What is the difference between pressure settings U, R, S, and T on the Wilkins ZW4004ILGSS series?

A: Each pressure setting letter corresponds to a different factory-calibrated outlet pressure profile. Setting U has a maximum rated inlet pressure of 200 psi, while settings R, S, and T have progressively different pressure ranges as shown in the residual pressure charts.

Q: Can the Zurn ZW4004ILGSS-U pressure setting be adjusted in the field?

A: No, the Wilkins ZW4004ILGSS-U is factory set and non-field adjustable to ensure consistent, tamper-proof pressure regulation in fire protection systems.

Q: What is the purpose of the integral supervisory switch on this valve?

A: The supervisory switch monitors valve position and provides alarm signals to fire alarm control panels if the valve is closed or tampered with, ensuring continuous system supervision as required by fire codes.

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