Danfoss 020B1132 Pressure Valve

The Danfoss 020B1132 is a professional-grade NRD 12s differential pressure valve designed specifically for discharge pressure regulation in commercial refrigeration and air conditioning systems. Engineered as a Danfoss 020-1132 replacement, this valve ensures reliable hot gas bypass performance by maintaining a constant differential between the receiver and discharge line. This ODF solder connection model features 1/2-inch inlet and outlet sizes, providing a hermetic seal essential for preventing refrigerant leaks in high-vibration environments. Technicians typically install the NRD 12s in tandem with a KVR condensing pressure regulator to maintain adequate receiver pressure during low ambient conditions. The stainless steel bellows and robust internal spring mechanism are calibrated for precise differential pressure control, ensuring the system remains balanced even under fluctuating thermal loads. Utilizing this valve within the discharge circuit optimizes HVAC system efficiency and protects compressor longevity by ensuring consistent mass flow rates across the expansion device.

• Precise Pressure Regulation: Maintains a fixed differential pressure of 1.4 bar (20 psi) to ensure stable liquid line feed.
• Direct OEM Compatibility: Serves as the official drop-in replacement for the legacy 020-1132 series, eliminating the need for piping modifications.
• Durable Solder Connections: Full ODF copper connections facilitate easy brazing into standard 1/2-inch refrigeration lines.
• Heavy-Duty Construction: Built to withstand the high temperatures and pressures associated with hot gas bypass and discharge lines.
• Multi-Refrigerant Support: Compatible with a wide range of HCFC and HFC refrigerants commonly used in commercial racks and chillers.

What is the opening differential for the Danfoss NRD 12s?
The NRD 12s is factory-set to begin opening at a pressure differential of 1.4 bar (20 psi) and is fully open at 3 bar (43 psi).

Can the 020B1132 be used in high-pressure CO2 systems?
This specific model is designed for standard HFC/HCFC applications; always verify the maximum working pressure (MWP) against your specific system requirements before installation.

Does this valve require insulation after brazing?
Because the NRD operates on the discharge side or hot gas bypass line, technical best practice suggests insulating the valve if heat loss impacts receiver pressure or to protect nearby sensitive components.

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.