The Dorin AU2-H503CC is a high-capacity semi-hermetic reciprocating compressor specifically developed for negative temperature (low-temperature) refrigeration systems. It is designed to serve large-scale industrial freezing operations, cold storage facilities, and deep-freeze logistics hubs that demand powerful and reliable performance.

General Description
As a part of the robust AU2-H series, the H503CC model offers exceptional cooling capacity, long-lasting durability, and operational efficiency. Its semi-hermetic design ensures ease of service, excellent reliability, and sustained performance under continuous, demanding low-temperature conditions.

Key Specifications

• Compressor Type: Semi-hermetic, reciprocating

• Application: Negative temperature (low-temp) refrigeration

• Cooling Capacity: Approx. 45–55 HP (depending on refrigerant and system design)

• Displacement: Approx. 50.3 m³/h

• Voltage: 380–420V / 3Ph / 50Hz

• Refrigerants: R-404A, R-507, R-448A, R-449A, and other low-temp refrigerants

• Oil Type: POE (polyolester)

• Motor Protection: Integrated thermal overload protection

• Usage: Ideal for industrial-scale freezing and cold chain applications

Conclusion
The Dorin AU2-H503CC is a reliable and powerful choice for negative temperature refrigeration, offering high performance, efficiency, and durability for intensive freezing environments.