QSI-90/120/140 & QGV-20/25/30 - Direct Drive Rotary Screw Air Compressor - Parts Manual - read online free

Nov 4, 2026

Parts manual for Direct Drive Rotary Screw Air Compressor models QSI-90/120/140 and QGV-20/25/30. Includes essential safety information, manual number 2012200010, and November 2012 edition details. Provides an organized parts breakdown and references to components such as air end, air filter, piping (air, fluid, control, discharge), cooler, receiver, drive coupling, motor mounting, decals, electrical control diagrams, and acoustical enclosures to support operation and maintenance activities.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages76

Reading Time3 h 12 min

AccessFree to download

Ordering Replacement Parts

Fluid Specifications

Air End (QSI/QGV)

Air End (QSI-90, QGV-20)

Air End (QSI-120/140, QGV-25/30)

Air Filter

Cooler

Inlet Valve

Inlet Valve (Modulation)

Inlet Valve (Variable Speed)

Drive Coupling and Motor Mounting

Drive Coupling (QSI/QGV)

Motor Mounting

Piping Systems

Air Piping

Discharge Piping

Fluid Piping

Control Piping (QGV, Microprocessor)

Control Piping (QSI, Gauge/Modulation)

Control Piping (QSI, Microprocessor)

Control Piping (QSI, Gauge, Load/No Load)

Control and Electrical Diagrams

Control Schematic (Gauge, Load/No Load)

Control Schematic (QGV, Microprocessor)

Control Schematic (QSI, Gauge, Modulation)

Control Schematic (QSI, Microprocessor)

Electrical Control Diagram (Gauge)

Electrical Control Diagram (Microprocessor Control)

Electrical Control Diagram (VSD)

Electrical Control & Starting

Decals

Receiver

Recommended Spare Parts

Acoustical Enclosure (QGV)

Acoustical Enclosure (QGV, W / Transformer)

Acoustical Enclosure (QSI)

Acoustical Enclosure (QSI, Gauge)

Acoustical Enclosure (QSI, Gauge, W / Dryer)

Acoustical Enclosure (QSI, Microprocessor, Less Dryer)

Acoustical Enclosure (QSI, Microprocessor, W / Dryer)

QSI-90/120/140 & QGV-20/25/30 Direct Drive Rotary Screw Air Compressor Parts Manual This manual contains important safety information and should be made available to all personnel who operate and/or maintain this product. Carefully read this manual before attempting to operate or perform maintenance on this equipment. Manual No. 2012200010 November 2012 Edition Manual Brought to You By: [IndustrialAirPower.com](IndustrialAirPower.com) Table of Contents ACOUSTICAL ENCLOSURE (QGV) .......................................................................................................... 48-49 ACOUSTICAL ENCLOSURE (QGV, W / TRANSFORMER) ........................................................................ 50-51 ACOUSTICAL ENCLOSURE (QSI, GAUGE).............................................................................................. 44-45 ACOUSTICAL ENCLOSURE (QSI, GAUGE, W / DRYER) .......................................................................... 52-53 ACOUSTICAL ENCLOSURE (QSI, MICROPROCESSOR, LESS DRYER).................................................... 46-47 ACOUSTICAL ENCLOSURE (QSI, MICROPROCESSOR, W / DRYER)...................................................... 54-55 AIREND MOUNTING ...................................................................................................................................... 8 AIR END (QSI-90, QGV-20) ........................................................................................................................... 4-5 AIR END (QSI-120/140, QGV-25/30)............................................................................................................. 6-7 AIR FILTER ................................................................................................................................................ 16-17 AIR PIPING ............................................................................................................................................... 34-35 CONTROL PIPING (QGV, MICROPROCESSOR) ...................................................................................... 30-31 CONTROL PIPING (QSI, GAUGE,W/MODULATION ) ............................................................................. 26-27 CONTROL PIPING (QSI, MICROPROCESSOR) ........................................................................................ 28-29 CONTROL PIPING (QSI, GAUGE, LOAD/NO LOAD) .............................................................................. 32-33 CONTROL SCHEMATIC (GAUGE, LOAD/NO LOAD) .................................................................................. 61 CONTROL SCHEMATIC (QGV, MICROPROCESSOR)................................................................................... 60 CONTROL SCHEMATIC (QSI, GAUGE, MODULATION) .............................................................................. 58 CONTROL SCHEMATIC (QSI, MICROPROCESSOR) .................................................................................... 59 COOLER ................................................................................................................................................... 42-43 DECALS .................................................................................................................................................... 56-57 DISCHARGE PIPING........................................................................................................................................ 9 DRIVE COUPLING (QSI/QGV)....................................................................................................................... 10 ELECTRICAL CONTROL DIAGRAM (GAUGE, FULL VOLTAGE) ................................................................... 62 ELECTRICAL CONTROL DIAGRAM (GAUGE, Y-D) ....................................................................................... 63 ELECTRICAL CONTROL DIAGRAM (MICROPROCESSOR CONTROL, FULL V

FAQs

What safety information does the parts manual include?

The manual states it contains important safety information and should be made available to all personnel who operate and/or maintain the product. It also advises careful reading before operating or performing maintenance.

Which compressor model ranges are covered in this parts manual?

The manual covers QSI-90/120/140 and QGV-20/25/30 Direct Drive Rotary Screw Air Compressors.

Where can electrical control and starting information be found?

The table of contents lists multiple electrical control diagrams (gauge, microprocessor control, and VSD) and sections for Electrical Control & Starting, including variants for gauge control, microprocessor control, and VFD.

Nov 4, 2026

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