Danfoss MTZ64-3VI Compressor

The Danfoss MTZ64-3VI is a professional-grade Maneurop reciprocating compressor designed for medium and high evaporating temperature (MBP/HBP) applications. Engineered for the 200-230V 3-phase power range, this 5.5 HP hermetic unit is fully gas-cooled, with suction gas passing directly through the motor to maintain optimal thermal stability without auxiliary cooling. The MTZ64HM3AVE model utilizes 175PZ polyolester oil (POE), making it compatible with a broad range of HFC, HFO, and HCFC refrigerants, including R404A, R134a, R407C, and R507. Featuring an internal motor protector and a high-torque motor, this compressor delivers consistent capacity even under heavy load conditions. Its 1-3/4" suction and 1-1/4" discharge Rotolock connections, paired with an 18.74 m³/h displacement at 3500 RPM, ensure this Danfoss MTZ64 remains a reliable standard for commercial refrigeration and process cooling retrofits.

Key Benefits

• Multi-Refrigerant Compatibility: Optimized for R134a, R404A, R407F, and R513A, providing flexibility for various system conversions.
• Liquid Hammer Protection: Large internal free volume effectively mitigates the risk of compressor damage from liquid refrigerant slugging.
• High Thermal Efficiency: The circular valve design and gas-cooled motor construction maximize volumetric efficiency and reduce internal heat transfer.
• Service-Ready Hardware: Includes a threaded oil sight glass and a 3/8" NPT oil equalization connection for simplified maintenance and parallel piping setups.

Common Questions

What is the primary difference between MT and MTZ series compressors?
The MT series is factory-charged with mineral oil for use with R22, while the MTZ64-3VI is charged with polyolester oil (POE), specifically designed for HFC and HFO refrigerants. Using these series interchangeably without an oil flush is not recommended for system longevity.

Can this compressor be used in low-temperature applications?
The Danfoss MTZ64 is engineered for medium-to-high evaporating temperatures. For low-temperature refrigeration below -4°F (-20°C) evaporation, a dedicated low-temp model like the Danfoss NTZ series should be used to avoid overheating the motor.

What electrical protection is integrated into this unit?
The unit features an internal motor protector that identifies overheating or overloading conditions, interrupting the circuit to prevent winding failure before the motor reaches critical temperatures.

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.