Engineered with an 85 HP heavy-duty motor and advanced rotor profile geometry, this semi hermetic screw compressor delivers an impressive displacement of 250 CFM. Built specifically for high-tonnage water-cooled central chillers and industrial cooling process plants, it maintains maximum volumetric efficiency and high mass flow stability under continuous heavy loads.

Featuring a dedicated 1-3/8 in economizer connection, this configuration allows integration of a liquid subcooling loop. Utilizing the economizer port substantially increases net refrigeration output and boosts overall system COP during high-load summer conditions without requiring proportional energy increases.

Equipped with dual solenoid valve capacity controls, the compressor operates across three step-unloading stages (100%, 66%, and 33%). This variable load-matching mechanism allows central chiller systems to match cooling demand precisely, minimizing operating costs during partial-load conditions.

Built with high-precision SKF/NSK rolling bearings and reinforced axial thrust bearings, the mechanical assembly reliably absorbs continuous pressure differentials. An integrated discharge gas muffler suppresses gas pulsation noise, while internal non-return check valves prevent reverse rotor rotation upon shutdown.

Designed for international industrial power grids across 50Hz and 60Hz utility standards, the 85 HP motor supports both Star-Delta and Direct-On-Line starting. Embedded NTC thermistors continuously supervise winding temperatures to protect against thermal degradation and electrical stress.

• Oil system components (including oil pump, etc.)
• Oil separator
• Unloading device
• Economizer
• Stop valves
• Suction flange
• Mounting bolts