Danfoss 003N4105 Valve

The Danfoss 003N4105 WVFX-25 is a pressure-operated water regulating valve designed for precise flow control in water-cooled refrigeration systems. This 1" G connection valve utilizes a bellows system to open on rising condensing pressure, maintaining constant head pressure even during fluctuating load conditions. Built with a brass body for corrosion resistance, the WVFX-25 valve supports a wide control range of 4 to 23 bar (58 to 333.5 psi), making it ideal for high-pressure refrigerants like R410A, R134a, and R404A, as well as modern A2L blends. With a Kv value of 5.5 m³/h and the ability to handle media temperatures from -25°C to 130°C, this pressure operated valve ensures stable condenser operation by modulating water flow based on cooling demand. The robust design includes a stainless steel bellows assembly and a 16 bar maximum working pressure rating, providing the durability required for industrial refrigeration and commercial HVAC applications where precise refrigeration valve performance is critical.

Key Benefits for Contractors

• Universal Compatibility: Optimized for fresh water and neutral brine, supporting a vast array of HFC and HCFC refrigerants.
• Precise Pressure Regulation: Maintains stable condensing pressures to prevent system trips and improve compressor longevity.
• Durable Construction: Features a high-grade brass body and reliable sealing to withstand aggressive water-cooled environments.
• Simplified Installation: Standard 1" G (ISO 228-1) threaded connections integrate seamlessly into existing piping layouts.
• Field Adjustable: The manual adjustment spindle allows for fine-tuning the opening pressure point to match specific system requirements.

Common Questions

Does this valve require an external power source?
No, the Danfoss 003N4105 is a self-acting pressure operated valve that functions mechanically based on the refrigerant pressure in the condenser.

Can the WVFX-25 be used with sea water?
For sea water applications, a titanium or stainless steel body (WVS series) is typically required; this brass valve is intended for fresh water and neutral brine.

What happens if the condensing pressure drops?
The valve is designed to close on falling pressure, restricting water flow to keep the condensing pressure from dropping below the set point, which is essential for proper expansion valve operation.

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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.