Quincy Compressor QSI Series, Instruction Manual

Page: 132 / 142

Appendix A - Technical Data
130
Quincy Compressor-QSI
®
QSI 1500

Standard

Full Load Operating Pressure psig 100 110 125
Maximum Operating Pressure psig 115 125 140
Minimum Operating Pressure psig

75

Maximum Ambient Operating Temperature:
Less Cabinet °F

115

With Cabinet °F

110

Minimum Ambient Operating Temperature °F

32

Compressor Drive Motor HP

300 350
Rotor Diameter mm

321

Male Rotor Speed rpm

1785 1790
Female Rotor Speed rpm

1190 1193
Rotor Tip Speed m/sec.

30.03 30.11
Inlet Capacity acfm 1521 1515 1504
Displacement at Operating Speed cfm

1672.4 1677
Volumetric Efficiency % 90.9 90.6 90.6
Aftercooling
Heat Rejection: Fluid Cooler BTU/min. 11611 12223 13125
Aftercooler BTU/min. 2296 2417 2677
Aftercooler Approach (standard conditions) °F

3-5

Maximum Allowable Static Backpressure in./H
2
O

0.125

Fan Motor HP

10

Fan Motor rpm

1170

Fan Flow cfm

26500

Water-cooled Cooling
Recommended Inlet Water Pressure psig

40-100

Vent Fan Motor HP

1/2

Aftercooler Approach to Cooling:
Water Temperature °F

13-18

Water Flow less Aftercooler at: 50°F gpm

15.9 19.7
70°F gpm

22.2 29.5
90°F gpm

39 64
Water Flow with Aftercooler at: 50°F gpm

21.2 26
70°F gpm

29 38.2
90°F gpm

49.7 81
Compressor Fluid
Total Fluid Capacity gallons

55

Reservoir Fluid Capacity gallons

46.5

Fluid Flow gpm

84

Typical Fluid Carryover ppm

1.5-5

Normal Airend Discharge Temperature °F

175-195

Sound (at 1 meter)
Unenclosed (AC/WC) dB(A)

96/92

Standard Cabinet (AC/WC) dB(A)

93/84

Low Sound Cabinet (AC) dB(A)

85
