Danfoss 020-1012 Check Valve

The Danfoss 020-1012 (NRV 12s) is a professional-grade, straightway HVAC check valve designed to maintain unidirectional flow in liquid, suction, and hot gas lines. Featuring a 1/2" ODF solder connection, this robust component utilizes a built-in damping piston, making it highly effective for discharge lines where compressor pulsations are common. Its brass body and copper connections allow for a maximum working pressure of up to 710 psig (49 bar), ensuring system integrity across a broad temperature range of -58°F to +284°F. The NRV 12s check valve is optimized for use with fluorinated refrigerants and is a staple for technicians looking to prevent back-condensation in cold evaporators. With a Cv value of 2.8 gal/min and a minimum pressure drop of 0.7 psi, it provides reliable performance without significant capacity loss. Whether for commercial refrigeration or residential air conditioning, the Danfoss NRV series delivers the hermetic seal and durability required for modern high-pressure systems.

Key Benefits for Contractors:

• Pulsation Resistance: Integrated damping piston protects the valve against vibration and mechanical stress in discharge lines.
• High Pressure Rating: Rated for up to 710 psig (49 bar), making it compatible with high-pressure refrigerants like R410A and CO2.
• Versatile Application: Suitable for multi-line placement including liquid, suction, and hot gas stages in refrigeration plants.
• Hermetic Construction: The ODF solder design ensures a leak-free system, minimizing potential call-backs due to refrigerant loss.
• Optimized Flow: High Kv/Cv values ensure minimal pressure drop even at lower system capacities.

Common Questions & Answers:

Can the Danfoss 020-1012 be installed in any orientation?
While the NRV 12s is a straightway valve, it is technically best practice to install it in a position where gravity doesn't compete with the internal spring, though the damping piston allows for versatility in various line configurations.

What is the minimum pressure required to open this valve?
The Danfoss NRV 12s requires a minimum differential pressure of 0.7 psi to fully open. Ensuring your system operates above this threshold is critical to prevent valve chatter.

Is this valve compatible with oil-free applications?
Yes, the NRV series is designed to be compatible with a wide range of lubricants and is suitable for oil-free refrigerant systems using R134a or R513A.

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.