Danfoss 003N-8125 Temperature Regulating Valve

The Danfoss 003N-8125 is a self-acting AVTA temperature regulating valve designed for precision cooling water control in industrial and HVAC applications. This 1-inch G-thread valve features a bellows actuated design that operates without external power, ensuring reliable performance in demanding environments. With a temperature setting range of 10°C to 80°C and a universal sensor featuring a 2.3-meter capillary tube, this thermostatic water valve provides accurate flow modulation based on sensor temperature increases. The valve body is constructed from forged brass, providing durability against aggressive media, while the EPDM O-rings ensure a tight seal. Designed for high-pressure systems up to 16 bar, the Danfoss AVTA 25 is a staple for hydraulic oil cooling, compressors, and vacuum pump systems where consistent thermal regulation is critical to equipment longevity. Every Danfoss cooling water valve in the AVTA series is pressure balanced to minimize the impact of inlet pressure fluctuations on regulation accuracy.

• Self-Acting Operation: Eliminates the need for electrical wiring or pneumatic controllers, reducing installation complexity.
• Broad Setpoint Range: Adjustable 10°C to 80°C (50°F to 176°F) range suitable for various industrial cooling requirements.
• Corrosion Resistance: Forged brass body and stainless steel internal components offer superior resistance to lime scale and mineral buildup.
• Universal Sensor: The 18mm x 160mm sensor can be mounted in any position relative to the valve body for flexible installation.
• High Flow Capacity: Large 1-inch orifice provides high Kv values for significant cooling water throughput.

How do I adjust the opening temperature on the AVTA 25?
The setpoint is adjusted via the handwheel; rotating the wheel changes the spring tension against the bellows, determining when the valve begins to open as the sensor bulb heats up.

Can this valve be used for heating applications?
No, the 003N-8125 is designed to open on a temperature rise (cooling), making it unsuitable for heating systems where a valve must close on temperature rise.

What is the maximum differential pressure for this valve?
The Danfoss 003N-8125 is rated for a maximum differential pressure of 10 bar (145 psi) to maintain stable regulation and prevent cavitation.

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.