VIAIR Ultra-Light Duty OBA - Manual (Page 6)

USER MANUAL
ULTRA-LIGHT DUTY ONBOARD AIR SYSTEM
COMPRESSOR APPLICATION GUIDE
To ensure that you get the highest level of satisfaction from your compressor performance, refer to
information below:
VIAIR COMPRESSOR REFERENCE CHART
COMPRESSOR SERIES DUTY CYCLE WORKING PRESSURE
100 SERIES 15% 130 PSI
215 SERIES 17% 150 PSI
225 SERIES 20% 150 PSI
265 SERIES 22% 150 PSI
275 SERIES 25% 150 PSI
300 SERIES 30% 150 PSI
400 SERIES 33% 150 PSI
450 SERIES 100% 150 PSI
500 SERIES 33% 150 PSI
550 SERIES 100% 150 PSI
ABOUT COMPRESSOR DUTY CYCLE:
Compressor Duty Cycle refers to amount of time a compressor can be operated in a given time
period, at 100 PSI & at a standard ambient temperature of 72°F.
Duty Cycle is commonly expressed as:
Compressor On Time / (Compressor On Time + Off Time)
As an example, a compressor that is rated for 20% duty cycle means that compressor can be
operated at 100 PSI @ 72°F for 8 Minutes and rested for 32 Minutes.
8 min. on / (8 min. on + 32 min. off) = 20% Duty Cycle
DUTY CYCLE REFERENCE CHART
DUTY CYCLE @100PSI / 72°F MINUTES ON / OFF
15% 6 Min. On / 34 Min. Off
17% 7 Min. On / 30 Min. Off
20% 8 Min. On / 32 Min. Off
22% 9 Min. On / 30 Min. Off
25% 10 Min. On / 30 Min. Off
30% 13 Min. On / 30 Min. Off
33% 15 Min. On / 30 Min. Off
100% Continuous Duty
ABOUT RATED WORKING PRESSURE:
To ensure trouble free service life of your compressor, always operate compressor within rated
working pressure of the compressor. Never use a pressure switch with a higher cut-off pressure
than compressor’s rated working pressure.