Quincy Compressor QSB Series, Instruction Manual, Page: 80 / 87

Appendix B - Technical Data
76
Quincy Compressor ® - QSB/T ™
QSB/T 25
Full Load Operating Pressure psig 100 125 150
Maximum Operating Pressure psig 115 140 165
Minimum Operating Pressure psig
"
75
!
Maximum Ambient Operating Temperature °F
"
110
!
Minimum Ambient Operating Temperature °F
"
35
!
Compressor Drive Motor HP
"
25
!
Full Load Drive Motor HP BHP 20.8 20.7 20.1
Unloaded Drive Motor HP BHP 5.4 4.8 4.1
Drive Motor Service Factor
"
1.15
!
Drive Motor Speed RPM
"
1770
!
Rotor Diameter mm
"
127.5
!
Male Rotor Speed rpm 2157 2031 1750
Female Rotor Speed rpm 1448 1364 1177
Rotor Tip Speed m/sec. 14.50 13.66 11.78
Inlet Capacity acfm 115 105 87
Aftercooling
Heat Rejection: Fluid Cooler BTU/min. 938 992 974
Aftercooler BTU/min. 197 181 148
Aftercooler Approach (standard conditions) °F
"
10
!
Maximum Allowable Static Backpressure in./H
2
O
"
0.125
!
Fan Flow cfm
"
2000
!
Water-cooled Cooling
(Consult factory for water temperatures under 50°F or over 90°F and for water/glycol cooling systems.)
Recommended Inlet Water Pressure psig
"
40-100
!
Aftercooler Approach to Cooling (water temperature) °F
"
10
!
Water Flow with Aftercooler at: 50°F gpm
"
2.0
!
70°F gpm
"
2.8
!
90°F gpm
"
4.9
!
Compressor Fluid
Total Fluid Capacity gallons
"
3.8
!
Reservoir Fluid Capacity gallons
"
2.5
!
Fluid Flow gpm 8.4 9.3 11.4
Typical Fluid Carryover ppm
"
3-5
!
Normal Airend Discharge Temperature °F
"
175-195
!
Sound (at 1 meter) (Base/Tank)
Unenclosed (AC/WC) dB(A)
"
77/77
!
Standard Cabinet (AC/WC) dB(A)
"
74/76
!
Low Sound Cabinet (AC) dB(A)
"
68/70
!