3.16
[en] 02/2014
Installation and operating manual - NK 31ROTORCOMP VERDICHTER
3.13 Oil cooler/air after-cooler (option)
With air-cooled screw compressor systems the
circulating oil is cooled down from the compres-
sor outlet temperature to the compressor injec-
tion temperature. As an option, ROTORCOMP
offers combination coolers with aluminum ns,
which are connected to the air and oil circulation
of the respective compressor (see Figure 3-13).
The corresponding coolers are dimensioned so
that they ensure operating safety at an ambient
temperature of up to 45°C/113°F. Sufcient cool-
ing air parameters are assumed.
The cold ambient air should be fed through the
cooler with a fan. A sufcient distance to the
cooler must be chosen in order to achieve uni-
form cooling air distribution over the entire effec-
tive cooling surface.
3.14 Safety valve (SIV) (option)
Figure 3-15
1. Knurled screw for operating test
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 separat-
ing system into account, the blow-off pressure
is a maximum of 1.5 bar above the respective
operating pressure (nal pressure) of the system.
The valve is type-tested and leaded (manufac-
turer’s certicate available on request).
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