Rotary Screw Compressor

QST/QSB: Long Efficient Life

The QST/QSB rotary screw air compressors feature large rotors--127mm in diameter. Because of their size, those roters can run at slower speeds than other Rotary Screw Compressors. Slower speeds give you extended airend life and quiet, economical, efficient operation.

The QST/QSB compressors also provide all the quality customers expect in an industrial application. That includes the Quincy airend, which features the latest, most efficient rotor profiles. Each rotor is shaped, profilea, and fine-tuned individually using state-of-the-art manufacturing processes. No other compressor manufacturer holds tighter manufacturing tolerances than our supplier—the rotors are machined precisely to provide you with maximum airend efficiency.

For the flexibility of a tank-mounted unit, select the QST; the base-mounted QSB is ideal for installations where space is tight. Either way, you are sure to get long, efficient operating life from our line of Rotary Screw Compressor.


Inside the QSB

QST/QSB Facts and Figures

CFM at various pressures*

Horsepower

15

20

25

30

40

50

100 psi

60

82

112

135

182

230

125 psi

47

70

103

117

159

200

150 psi

---

61

85

106

136

180

Approximate shipping weight (lbs)

Horsepower

15

20

25

30

40

50

Base-mounted

1130

1130

1130

1420

1610

1695

Tank-mounted

1665

1665

1665

1955

2145

2230

Approximate dimensions**

 

Base-mount
w/o cabinet

Base-mount
w/cabinet

Tank-mount
w/o cabinet

Tank-mount
w/cabinet

 

Height

47"

47"

75"

75"

 

Width

34"

38"

34"

38"

 

Length

62"

62"

80"

80"

 

We reserve the right to change specifications without liability, without advance notice, and without incurring any obligation for products previously or subsequently sold.

*Consult factory for 50-cycle performance

**See the QST and QSB technical data sheets for exact dimensions.

Proper filtration must be used for breathing air applications to meet OSHA 29CFR1910.

Performance rated in accordance with CAGI/PNEUROP PN2CPTC2 test code.

Large rollers for longer life and higher efficiency

Standard features

  • 127mm rotors for slow-speed, economical operation and maximum airend life
  • Oversized cylindrical roller bearings on suction end
  • V-belt drive with OSHA-compliant guard
  • Triple-lip seal with lubricant scavenge system
  • Cast iron construction
  • Across-the-line full voltage starters
  • Factory fill of Quin-Syn® lubricant
  • Spin-on, 8-micron absolute, micro-fiberglass lubricant filter with full-flow bypass
  • Lubricant thermal valve
  • Air discharge check valve
  • Air/oil reservoir safety valve
  • Control line filter (with auto-dual control)
  • High Air Temperature (HAT) shutdown protection
  • Air filter indicator
  • Heavy-duty intake filter
  • Modulation with percent capacity gauge
  • Auto-dual control
  • Remote-mounted separator indicator

Options

  • NEMA 4
  • 200/230/575 volt motors
  • 50 cycle
  • TEFC and high-efficiency motors
  • Wye-Delta reduced voltage starting
  • Low-sound enclosures
  • Water-cooled oil cooler and aftercooler
  • Lead/lag control


Lubricants

Warranty

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