ROTORCOMP NK 100, Operating Manual, Page: 22 / 52

ROTORCOMP VERDICHTER Operating Manual - NK 100
3.14 [en] 09/2008
3.11.1 Oil filter
Figure 3-15
1. Oil filter
2. Bearing cap
The oil filter 1 is screwed onto the bearing cap 2 .
The filter fineness is 20 µm.
The replacement filter has a bypass valve which
opens with cold, high-viscosity oil or a heavily
soiled filter with a pressure difference of 2.5 bar.
This eliminates the undersupply of the screw com-
pressor with oil, which results in the maximum per-
missible compression temperature being
exceeded.
3.11.2 Oil thermostat
Figure 3-16
The NK 100 is equipped with an integrated oil
thermostat 1 . This is located in the bearing cap
before the oil filter and is accessible from outside
(left side).
The oil thermostat working element can be
replaced and must be selected in accordance with
the operating temperature.
The oil thermostat opens the connection to the oil
cooler when the operating temperature is reached
and controls the maintaining of the optimum tem-
perature of the system in the further process.
In the startup phase this parameter is reached
faster, and therefore the formation of condensate
in the oil circulation is largely avoided.
Depending on the compressor operating data, the
temperature is to be between 80°C and 110°C/
176°F and 230°F (measured at compressor out-
let).
When designing the cooling system, the pressure
dew point graph (Figure 8-1) must be taken into
account.
If questions arise concerning the pressure dew
point, please contact ROTORCOMP.
The oil thermostat is maintenance-free. Operation
of the compressor system with an impermissible
overtemperature can result in a failure of the work-
ing element (in this case the working element must
be replaced).
L
Note:
When the system is operated at 15 bar, the ther-
mostat working element must always be adapted
to the increased requirements
1
2
1