The Danfoss MT28-4VI Compressor is a heavy-duty, 2.5 HP hermetic reciprocating compressor specifically designed for medium and high evaporating temperature applications. Engineered to operate on a 460V 3-phase power supply at 60Hz, this Maneurop MT series unit is a reliable workhorse for commercial refrigeration and HVAC systems utilizing R22 refrigerant and mineral oil. Built with a large internal free volume, this Danfoss MT28 reciprocating compressor effectively mitigates the risk of liquid hammering, while its 1-cylinder design ensures consistent performance in high-demand environments. The motor is fully suction-gas cooled, allowing for the use of acoustic jackets without overheating concerns. With a displacement of 2.93 cu.in/rev and rated for 30,231 BTU/h at standard air conditioning conditions, the MT28-4VI features high-torque motor starting capabilities and 1-inch Rotolock connections for secure, leak-proof integration into existing R22 refrigeration systems. Key Benefits: High Volumetric Efficiency: Features a unique circular valve design and high-efficiency motor to maximize COP in commercial refrigeration. Robust Liquid Handling: Large internal volume protects the reciprocating compressor against liquid refrigerant slugs during startup or defrost cycles. Superior Heat Dissipation: Constructed with aluminum pistons and connecting rods for lightweight operation and rapid heat transfer. Ease of Installation: Equipped with standard 1" Rotolock suction and discharge ports, an oil sight glass, and a 3/8" NPT oil equalization port. Common Questions: What is the difference between Danfoss MT and MTZ series? The MT series, like the MT28-4VI, is factory-charged with mineral oil for use with R22 refrigerant. The MTZ series uses polyolester (POE) oil for HFC refrigerants like R404A or R134a. Can I use an acoustic jacket with this compressor? Yes. Because the MT28-4VI is 100% suction-gas cooled, the motor remains at a safe operating temperature even if the shell is insulated for noise reduction. Does this unit come with a crankcase heater? No, the crankcase heater is not included. It is highly recommended to purchase one as an accessory for systems where the compressor is exposed to low ambient temperatures to prevent refrigerant migration. Please contact us for shipping charge on this item. Danfoss MT28-4VI Compressor 460v 3ph 2.5hp Recip Compressor 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.
