Armstrong International A23520 Valve Assembly

The Armstrong International A23520 Valve Assembly is a high-performance OEM fill valve kit engineered specifically for the HC Series HumidiClean humidification systems. This solenoid-operated assembly is critical for regulating makeup water flow, ensuring the humidifier maintains optimal water levels for consistent steam production across model ranges including the HC-6100, HC-6300, HC-4100, and HC-4500. Operating on a 24V 50/60 Hz control signal with a 10-watt power rating, the A23520 is designed to withstand the high-temperature environments of industrial steam systems. This complete humidifier replacement part includes the valve body and integrated solenoid coil, facilitating a direct swap for the legacy B5146 part number. Built for durability in commercial HVACR applications, it features a 3/8-inch compression fitting for secure connection to standard potable water supplies. For technicians servicing Armstrong HumidiClean units, this genuine assembly is the standard solution for resolving intermittent fill cycles or low-water cutouts triggered by scaling or mechanical fatigue in the original valve.

• System Compatibility: Purpose-built for HumidiClean HC Series humidifiers, including several floor and wall-mounted configurations.
• Simplified Maintenance: Direct OEM replacement for part number B5146, reducing field labor time and ensuring precise fitment.
• Industrial-Grade Build: Features a robust 10W 24VAC solenoid designed for the duty cycles of continuous commercial humidification.
• Accurate Level Control: Prevents overfilling and high-water switch errors by ensuring a clean, rapid shut-off during the fill sequence.

Is the A23520 compatible with DI or RO water?
This specific fill valve assembly is designed for use with standard potable tap water and may not be compatible with highly corrosive Deionized (DI) or Reverse Osmosis (RO) water systems.

What causes a "Low Water" alarm even when the valve is energized?
Usually, this indicates debris in the fill valve inlet screen or a failed solenoid coil. Check for 24V at the coil; if voltage is present but no water flows, the valve internal or screen is likely obstructed.

Can I use this valve on the EHU-700 or EHU-800 series?
No, the A23520 is specifically indexed for the HC Series HumidiClean. Electronic Steam (EHU) series humidifiers typically require different voltage or flow-rated solenoids.

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.