WhisperAir™ Oil-free Rotary Tooth Compressor
Model Series PCC & PCCMD – 50 HP
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
(T) 1.888.769.7979 • (F) 513.367.3125 • www.powerexinc.com
IN594501AV • 02/2016
Page 5 of 32
Specifications for High Pressure System
Type
Unit
Model PCC500HP
Main Body
No. of Compression Stages
–
2
Rotating Speed Fixed speed version
RPM
6320
Speed adjusting range VFD mode
–
105% at pressures below 116 psig, 100% to target setting, psig,
decreasing to 40% at max pressure
Unit
Suction gases, pressure, temperature
–
Air/Atmospheric Pressure 36 F to 104°F
Discharge pressure
PSIG
125
F.A.D. (Free Air Delivery)
SCFM @ 100 PSIG
179, 183 (VFD)
Driving method
–
Direct driven with coupling, step-up gears
Control mode
–
Load/Unload with automatic start/stop
(Models with R control use VFD operation of Main Drive Motor Only)
Working pressure
PSIG
118-125 default setting for Load – unload
121 default target pressure for VFD
Cooling method
–
Ra cooling fan air-cooled
Discharge air temperature
°F
Inlet tempe22°F
Air outlet connection
NPT
1-1/2°F
Oil volume
Quarts
27
Oil Type
–
ISO32 PAO Synthetic gear oil ISEL2015-32
Noise level
dB(A)
68
The level of ground vibration
dB
Below 45 (the front side of the air compressor, above concrete)
Electrical Equipment
Power supply
–
Three-phase AC rated voltage ±10% 60 Hz
Starting method
–
Electromagnetic Star Delta starter or VFD
Compressor motor
Specification
–
Horizontal shaft, D-flange, 3 phase, totally enclosed fan cooled, 2-
pole, type F insulation, IP55
Power
HP
50 (Service Factor S.F. 1.25)
Cooling fan motor
Specification
–
Three-phase, totally enclosed fan cooled, 6-pole, F insulation, IP54
Power
kW
0.75
Oil pump motor
Specification
–
Three-phase, totally enclosed fan, 4-pole, B insulation, IP44
Output
kW
0.4
Protection
Temperature
–
Detected by temperature sensors
Overload current, open phase
protection
–
Detected by thermal overload
Low oil pressure
–
Detected by oil pressure sensor
Suction filter clogging
–
Detected by negative pressure sensor
Over pressurization
–
Safety valve
Other
Dimensions (compressor only)
in
77”W x 40”D x 65”H
Weight (including oil)
lb
2940
NOTE:
1.
F.A.D (Free Air Delivery) means the volume of atmospheric air that can be taken in by the compressor at inlet
conditions of atmospheric pressure. Equal to SCFM if inlet condition is standard.
2. Noise level is measured at the distance of 1.5m from the front of a compressor and at the height of 1m from ground.
3. Service factor means the allowable limit of the air compressor motor.
