ROTORCOMP NK 100, Руководство по эксплуатации, Страница: 42 / 52

ROTORCOMP VERDICHTER Operating Manual - NK 100
8.2 [en] 09/2008
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
L
Note :
The optimum operating temperatures for the
screw compressor 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 compressor system make this pos-
sible. The entire thermal economy must be calcu-
lated.
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
compressor operating temperature in order to pre-
vent 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 compressor with lubricant following start-
ing while taking into account the higher pressure
losses in the oil circulation which is still cold. The
higher cold-starting power requirement must not
overload the compressor drive.