Rotary Screw Compressor

The Quincy QSI

The Quincy QSI Rotary Screw Compressor combines around-the-clock dependability with one of the most efficient, positive displacement airends available. Oversized rotors, low RPM's, and the Power$ync advanced controller ensures maximum air production using minimum horsepower, witch means bottom-line productivity.

Backed by an available five or ten year airend warranty, the Quincy QSI features an exclusive Triplex bearing arrangement, a triple lip shaft seal, and boasts an airend life of over 130,000 hours. This is the standard of True Blue Reliability that perpetuates the value of Quincy.

The Quincy QSI airend is the result of over 30 years of proven performance and machining expertise. Starting with a state-of-the-art rotor profile, each rotor is measured using a polar coordinate measuring machine - with an allotted tolerance of 0.0005 of an inch.

Beyond this highly efficient rotor profile and unparalleled precision manufacturing standards, Quincy rotors are oversized - almost 62% larger than most competitors. And the Quincy QSI is designed to turn these oversized rotors at a slow 1,800 rpm. This means long compressor life and increased efficiency.

Every Quincy QSI features a direct coupling drive and C-faced motors with a flanged connection to the airend on models through the Quincy QSI 750. This flanged drive system ensures a permanent alignment and a simple drive system.

An oversized, heavy-duty inlet filter and oversized fluid and aftercoolers are standard on the Quincy QSI. With these and other standard features designed to work in harsh operating conditions, the Quincy QSI is truly one of the most reliable compressors available.


Inside the QSI

PowerSync
Standard equipment
  • Axial flow inlet housing
  • Triplex discharge end bearings
  • Full-flow fluid pump
  • Warning and shutdown annunciator
  • 460 or 575 volt, 3-phase, 60hz, 1800rpm 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/fluid separation
  • Full-flow, 10-micron fluid filter
  • Heavy-duty intake filter
  • Auto-dual control with modulation
  • Percent capacity gauge
  • QuinSyn synthetic fluid (food grade optional at no additional charge)
  • 5-degree approach aftercooler with moisture separator and trap
  • Package discharge check valve
  • Hourmeter

QSI Series Air- and Water-Cooled Helical Screw Air Compressors

50-300 HORSEPOWER/ 245-1515 ACFM @ 110 PSIG FULL LOAD

60-350 HORSEPOWER/ 243-1504 ACFM @ 125 PSIG FULL LOAD

Model Air delivery

QSI-245

QSI-370

QSI-500

QSI-750

QSI-1000

QSI-1250

QSI-1500

CFM @ 110 PSIG
FULL LOAD

245

370

500

757

1010

1264

1515

M3/MIN
@ 7,72 KG/CM2

6.77

10.05

13.58

20.56

28.63

35.8

42.9

Motor

HP

50

75

100

150

200

250

300

RPM

1800

1800

1800

1800

1800

1800

1800

Rotor diameter

IN

8.031

8.031

10.04

10.04

12.64

12.64

12.64

MM

204

204

255

255

321

321

321

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

Technical Data QSI Series Compressors

@ 140 PSIG---9,84 KG/CM2---Maximum operating pressure

Model Air delivery

QSI-245

QSI-370

QSI-500

QSI-750

QSI-1000

QSI-1250

QSI-1500

CFM @ 125 PSIG
FULL LOAD

243

364

495

751

1003

1255

1504

M3/MIN
@ 8,79 KG/CM2

6.71

9.97

13.56

20.4

28.4

35.54

42.59

Motor HP

60

100

125

200

250

300

350

RPM

1800

1800

1800

1800

1800

1800

1800

Rotor diameter

IN

8.031

8.031

10.04

10.04

12.64

12.64

12.64

MM

204

204

255

255

321

321

321

Approximate weight

WN

LBS

2335

2895

3655

5560

6995

8700

9290

KG

1059

1313

1798

2527

3173

3946

4214

WC

LBS

2725

3285

4340

6625

7890

9715

10735

KG

1236

1490

1973

3011

3579

4407

4869

AN

LBS

2420

2980

4110

5980

7900

8870

10100

KG

1098

1352

1868

2718

3583

4023

4581

AC

LBS

2810

3370

4940

6905

9390

9730

11095

KG

1275

1529

2245

3139

4259

4414

5033

Key:

WN--Water-cooled without cabinet

WC--Water-cooled with cabinet

AN--Air-cooled without cabinet

AC--Air-cooled with cabinet

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
  • PowerSync variable capacity airend and electronic controls.

Note: If a specific motor efficiency is required, please consult the factory.  Proper filtration must be used for breathing air applications to meet OSHA 29CFR1910


Lubricants

Warranty

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