Danfoss 003N-6252RA AVTB-RA Thermostatic Temperature Controller 1/2" NPT 77-149°F

The Danfoss 003N-6252RA is an AVTB-RA reverse-acting thermostatic temperature controller designed for automatic water temperature regulation in HVAC systems, heat exchangers, hot water tanks, and process applications. This self-operating valve requires no external power source or compressed air, providing reliable temperature control through a thermostatic actuator.

Key Features:

• 1/2 inch connection size for compact installations
• Temperature control range: 77°F to 149°F (25°C to 65°C)
• Reverse-acting operation: opens on rising sensor temperature
• Self-acting design with no external power required
• Integrated thermostatic actuator with bellows, capillary tube, and sensor
• Manual temperature adjustment handle for set point control
• Durable brass construction for long service life

The AVTB-RA series differs from standard AVTB controllers in its reverse-acting operation, making it ideal for applications requiring the valve to open as temperature increases. The thermostatic element responds to temperature changes at the remote sensor location, automatically modulating water flow to maintain the desired set point. This controller is commonly used in heating systems, process temperature control, and applications where increasing temperature demands increased flow.