ROTORCOMP NK 100, Operating Manual, Page: 23 / 52

Operating Manual - NK 100
[en] 09/2008 3.15
3.12 Oil cooler/air after-cooler (option)
With air-cooled screw compressor systems the cir-
culating oil is cooled down from the compressor
outlet temperature to the compressor injection
temperature. As an option, ROTORCOMP offers
combination coolers with aluminum fins, which are
connected to the air and oil circulation of the
respective compressor (see Figure 3-14).
The corresponding coolers are dimensioned so
that they ensure operating safety at an ambient
temperature of up to 45°C/113°F. Sufficient cool-
ing air parameters are assumed.
The cold ambient air should be fed through the
cooler with a fan. A sufficient distance to the cooler
must be chosen in order to achieve uniform cool-
ing air distribution over the entire effective cooling
surface.
3.13 Safety valve (SIV) (option)
Figure 3-17
1. Knurled screw for operating test
d
Warning:
The safety valve must be installed prior to com-
missioning.
Operation of the system without a safety valve can
be hazardous!
The safety valve is located on the basic module,
and is provided with a test device.
While taking the pressure loss in the oil separating
system into account, the blow-off pressure is a
maximum of 1.5 bar above the respective operat-
ing pressure (final pressure) of the system.
The valve is type-tested and leaded (manufac-
turer's certificate available on request).
1