The Quincy QSI Series
Air and Water Cooled Helical Screw Air Compressors
50-300 HP, 245-1515 ACFM @110 PSIG Full Load
60-350 HP, 243-1504 ACFM @125 PSIG Full Load

Outstanding package features ensure 24-hour reliability.

Low noise, Quincy QSI compressors have the lowest noise level of any non-cabinet compressor in their class. Two cabinet options offer even lower noise levels-as low as 73 dBa. Low lubricant carryover. Quincy's separator design and engineered lubricants combine to produce lubricant make-up rates of less than 3 PPM and downstream carryover rates of 1 PPM or less.

• Easy serviceability. All normal maintenance items are conveniently located at one end of the machine for easy serviceability.
• High-efficiency lubricant filter. Quincy uses a 10-micron absolute lubricant filter with a special micro-fiberglass media to provide the best protection for the airend and bearings.
• Over-sized aftercoolers. The QSI line of compressors uses aftercoolers with a 3 - 5 degree approach at standard conditions. This means more moisture is removed by the aftercooler, improving dryer efficiency.
• UL-approved electrical controls. All Quincy compressor electrical controls are designed, inspected, and approved to UL and NEC specifications.

Standard equipment

• Axial flow inlet housing
• Triplex discharge end bearings
• Full-flow lubricant pump
• Warning and shutdown annunciation
• 460 or 575 volt, 3-phase, 60hz, 1800 rpm motor
• Full-voltage magnetic starter, mounted and wired, 460 volt (through QSI 750)
• Flexible dropout coupling with OSHA guard
• Heavy-duty structural steel base
• Two-stage air/lubricant separation
• Full-flow, 10-micron lubricant filter
• Heavy-duty intake filter
• Auto-dual control with modulation
• Percent capacity gauge
• Quin-Syn synthetic lubricant (food grade optional at no additional charge)
• 5-degree approach aftercooler with moisture separator and trap
• Package discharge check valve
• Hourmeter

Safety devices

• UL-approved electrics
• High pressure unload switch
• High pressure safety relief valve
• Dual probe, high air/lubricant temperature shutdown system
• Control line filtration with auto drain
• Power-on light
• Emergency stop button
• Safety oil fill cap

Optional equipment

• Full metal canopy
• Low sound canopy
• High efficiency and TEFC motors
• Solid-state or wye-delta reduced voltage starters
• Salt water coolers
• Lifting bails
• Auto restart
• Phase monitor
• Lead/lag control
• Load/no load control
• PowerSmart variable capacity airend and electronic controls
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