Avoid mixing lubricants of different brands or types as they may not be compatible and
the oil mix may have inferior properties. A label, indicating the type of oil filled ex factory,
is stuck on the air receiver/oil tank.
Relation between the operating conditions and the duty type
Ambient temperature Humid Dust Duty type
Below 30 °C (86 °F) No No Mild
Below 30 °C (86 °F) Yes No Mild
Below 30 °C (86 °F) No Yes Mild
Below 30 °C (86 °F) Yes Yes Demanding
Between 30 °C (86 °F)
and 40 °C (104 °F)
No No Demanding
Between 30 °C (86 °F)
and 40 °C (104 °F)
Yes No Demanding
Between 30 °C (86 °F)
and 40 °C (104 °F)
No Yes Demanding
Between 30 °C (86 °F)
and 40 °C (104 °F)
Yes Yes Extreme
Above 40 °C (104 °F) - - Extreme
Roto-Inject Fluid NDURANCE
Atlas Copco's Roto-Inject Fluid NDURANCE is a premium mineral oil based 4000 hours lubricant,
specially developed for use in single stage oil injected screw compressors running in mild
conditions. Its specific formulation keeps the compressor in excellent condition. Roto-Inject Fluid
NDURANCE can be used for compressors operating at ambient temperatures between 0 ˚C (32
˚F) and 40 ˚C (104 ˚F). If the compressor is regularly operating in ambient temperatures above 35
°C (95 °F), it is recommended to use Roto Synthetic Fluid ULTRA or Roto Synthetic Fluid XTEND
DUTY.
See the table below for recommended oil exchange intervals:
Ambient temperature Element outlet
temperature
Exchange interval Maximum time interval
up to 30°C (86°F) up to 95°C (203°F) 4000 1 year
from 30°C (86°F) up to
35°C (95°F) (see note)
from 95°C (203°F) up to
100°C (212°F)
3000 1 year
from 35°C (95°F) up to
40°C (104°F) (see note)
from 100°C (212°F) up to
105°C (221°F)
2000 1 year
above 40°C (104°F) above 105°C (221°F) use Roto Synthetic Fluid
XTEND DUTY
use Roto Synthetic Fluid
XTEND DUTY
Note: the presence of dust and/or high humidity may require a shorter exchange interval. Consult
Atlas Copco.
Instruction book
64 API161475
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