Danfoss 003N3411 Water Regulating Valve

The Danfoss 003N3411 is a pressure-operated WVFX 20 water regulating valve designed for modulating flow in water-cooled condensers. Engineered for compatibility with R410A high-pressure refrigerants, this valve maintains a constant condensing pressure by precisely adjusting water volume based on system demand. Featuring 3/4 inch G-thread connections, the WVFX 20 is a direct-acting solution that operates without the need for an external pilot, making it essential for HVAC water-cooled systems requiring reliable head pressure control. The bellows are designed to withstand high working pressures, ensuring the condenser water valve remains stable even during rapid cycling. For technicians, the primary advantage is the manual adjustment screw, allowing for field-calibrated setpoints that optimize chiller efficiency and prevent low head pressure issues during low ambient operations. This Danfoss water valve is a robust choice for industrial and commercial refrigeration units where precise thermal management is critical.

Key Technical Benefits

• Optimized for R410A: Built to handle the higher operating pressures associated with modern high-efficiency refrigerants.
• Direct-Acting Modulation: Provides immediate response to pressure changes without the lag found in pilot-operated valves.
• Broad Regulation Range: Enables precise condensing pressure control across varying load conditions to prevent compressor cycling.
• Corrosion Resistant: Constructed with high-quality materials to maximize service life in cooling tower or well water applications.
• Compact Footprint: The 3/4 inch water regulating valve design allows for easy integration into tight mechanical skids and retrofits.

Common Installation & Operation Questions

How do I adjust the opening pressure on the Danfoss WVFX 20?
Use the adjustment spindle located at the top of the valve. Turning it clockwise increases the opening pressure, while counter-clockwise decreases it. Fine-tuning should be done while the system is under load to ensure stable head pressure.

Can this valve be used with glycol solutions?
Yes, the Danfoss 003N3411 is compatible with neutral brines and ethylene glycol solutions, provided the concentrations do not exceed manufacturer specifications for the seal materials.

What is the maximum working pressure for this model?
The WVFX 20 for R410A is rated for a maximum working pressure (MWP) on the refrigerant side of approximately 653 psig (45 bar), making it suitable for modern high-pressure commercial systems.

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.