Aaon R75220 24V 1/4" NPT Water Flow Switch

The Aaon R75220 is a 24-volt water flow switch designed for commercial HVAC applications. This flow switch monitors water flow in hydronic heating and cooling systems, providing critical safety and operational control by detecting when flow falls below acceptable levels.

Key Features:

• 24V operating voltage for compatibility with standard HVAC control systems
• 1/4" NPT threaded connection for easy installation in piping systems
• Paddle-style flow sensing mechanism for reliable flow detection
• Adjustable flow setpoint to accommodate various system requirements
• Snap-action switch contacts for positive circuit control
• Designed specifically for Aaon rooftop units and hydronic equipment

This flow switch is commonly used as a safety device to protect equipment from low-flow or no-flow conditions that could cause freezing or equipment damage. When water flow drops below the setpoint, the switch changes state to signal the control system, which can then shut down the unit or activate an alarm. The 1/4" NPT connection allows for installation in smaller diameter lines or mounting in a tee fitting on larger mains.