ROTORCOMP EVO15, Operating Manual

Page: 28 / 36

ROTORCOMP VERDICHTER Operating Manual -
EVO ®
Line
8.2 [en] 07/2020
Figure 8-1 Pressure dew point graph
8.1.5 Pressure dew point of compressed air
Example:
1*) Temperature of the intake air is 20°C/68°F,
humidity is 50 %, resulting in an absolute humidity
of approx. 8.6 g/m
3
in the intake air.
At a pressure of 10 bar, the pressure dew point is
approx. 51°C/124°F.
2*) Temperature of the intake air is 40°C/104°F,
humidity is 90 %, resulting in an absolute humidity
of approx. 45.6 g/m
3
in the intake air.
At a pressure of 10 bar, the pressure dew point is
approx. 92°C/198°F.
8.1.6 Temperatures
Note:
The optimum operating temperatures for the
screw compressor air end system can only be
achieved if the oil circuit components (thermostat,
cooler, fan, etc.) have been properly designed and
the supply and exhaust air temperatures of the
installation room and the screw compressor air
end system make this possible. The entire thermal
economy must be calculated.
8.1.7 Condensate damage
The relative humidity and the final operating pres-
sures must always be taken into account in accor-
dance with the selection graph for the working
temperature of the thermostat element and for the
screw-compressor air end operating temperature
in order to prevent condensate from forming in the
system.
8.1.8 Cold starts
During compressor cold starts , the viscosity of
the oil must enable the sufficient, immediate sup-
ply of the screw compressor air ends with lubricant
following starting while taking into account the
higher pressure losses in the oil circulation which
is still cold. The higher cold-starting power require-
ment must not overload the screw compressor air
end drive.