Parker 73218BN4UNLVN0C111 Valve

The Parker 73218BN4UNLVN0C111 is a high-performance 2-way normally closed solenoid valve designed for rugged industrial fluid control and HVACR applications. Engineered with a durable brass body and 1/2" NPT ports, this pilot operated valve utilizes a 24VDC coil to manage the flow of compatible liquids and gases. With a minimum operating pressure differential of 5 PSI and a maximum rating up to 175 PSI, it ensures reliable shut-off and consistent performance in systems involving chillers, boilers, and air handling units.

This Parker 73218 solenoid valve features an internally piloted actuation mechanism and NBR seal material, making it suitable for fluid temperatures up to 185°F. The 10-watt power consumption and 1/2" conduit connection with 18" leads facilitate seamless integration into standard 24VDC control circuits. As a normally closed (N/C) valve, it provides an inherent fail-safe by blocking flow when de-energized, critical for maintaining system safety and preventing leakage in demanding commercial environments.

• Efficient Flow Control: The 5/8" orifice and pilot-operated design allow for precise regulation of medium-flow industrial applications.
• Enhanced Safety: The redundant N/C configuration ensures the valve remains closed during power loss, protecting downstream equipment.
• Broad Compatibility: Standard 1/2" NPT threading and 24VDC operation make it a direct-fit replacement for various HVACR manufacturers.
• Durable Construction: Heavy-duty brass body and NEMA 4X-rated coil options are built to withstand harsh mechanical environments.
• Industry Certified: Meets CSA and UL 429A standards for safety shutoff and fire suppression pilot valve service.

What is the minimum pressure required for this valve to open?
This is a pilot-operated valve, meaning it requires a minimum pressure differential of 5 PSI to function correctly. It will not operate in zero-pressure or gravity-feed systems.

Can the 73218BN4UNLVN0C111 be used for steam applications?
No, this specific model uses NBR seals rated for a maximum fluid temperature of 185°F. For high-temperature steam, you must specify a model with FKM or PTFE seals.

How do I wire the conduit connection?
The valve includes a 1/2" NPT conduit connection with 18" leads. Ensure polarities are correct for your 24VDC power supply to avoid coil damage or intermittent actuation.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.