Danfoss 020B1011 Check Valve

The Danfoss 020B1011 Check Valve is a professional-grade NRV 10S piston-type component designed for reliable one-way refrigerant flow. Engineered with a durable brass body and 3/8 inch ODF solder connections, this valve is built to survive the high-pressure demands of commercial refrigeration and industrial AC units. It provides a necessary barrier against backflow, specifically in liquid, suction, and hot gas lines where maintaining system pressure differentials is critical. This specific model serves as the direct 020B1011 replacement for legacy parts 020-101100 and 020-1011.

With a maximum working pressure of 49 bar (711 psig) and a temperature range spanning -58°F to 311°F, this Danfoss refrigeration valve is compatible with a wide array of HCFC, HFC, and flammable refrigerants, including R410A, R404A, and R32. The internal piston design ensures a tight seal with a minimum pressure drop, optimizing the HVAC check valve efficiency and protecting compressors from liquid slugs during the off-cycle.

• Universal Compatibility: Approved for use with high-pressure refrigerants and modern low-GWP blends, ensuring long-term field relevance.
• Optimized Flow: Features a Cv value of 1.39 gal/min, minimizing energy loss across the refrigerant check valve.
• Robust Construction: Precision-machined brass and copper solder materials resist corrosion and handle thermal cycling without fatigue.
• Sealing Integrity: Engineered to provide 100% shut-off in the reverse direction, preventing high-side pressure from migrating to the evaporator.

Where should the Danfoss NRV 10S be installed?
Technicians typically install the 020B1011 in the liquid line or discharge line to prevent refrigerant migration to the compressor or evaporator during stand-still periods.

Does this valve support hot gas defrost applications?
Yes, the NRV 10S is rated for hot gas discharge lines, provided the operating temperatures and pressures do not exceed the stated 311°F and 711 psig thresholds.

Which refrigerants are compatible with this check valve?
It is fully compatible with R22, R134a, R404A, R407C, R410A, R507, and various A2L refrigerants like R32 and R1234yf.

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.