Operating instructions for S 40-3...S 150-3 series screw compressors Page 49
Accessory equipment 5.2 BOGE Duotherm BSW
– After cleaning, rinse the plate heat exchanger thoroughly with water (e.g.
using a pressure washer).
5.2 BOGE Duotherm BSW
Function
The safety heat exchanger BOGE Duotherm Plus BSW is approved for drink-
ing water. It is integrated in the main stream of the hot compressor oil. The ad-
ditional safety it provides in comparison with the plate heat exchanger results
from the following measures:
– Separation of the circuits
In this heat exchanger, the oil and water circuits are completely separated
by a confining liquid.
The confining liquid transmits the heat. In the event of heat exchanger dam-
age, this prevents the oil and water from mixing.
It is impossible, therefore, for the drinking water to become contaminated.
– Pressure control device
A pressure control device responds immediately to a burst or fractured pipe
within the system, emitting a pulse which can be individually processed
(e.g. alarm, switching off the system).
Operating conditions
NOTICE!
If the cleaning measures specified above are not sufficient, you should have
the exchanger cleaned by a service company. Boge's service department will
recommend contracting companies on request.
NOTICE!
Set the pressure control device to a value at least 20% lower than the mini-
mum pressure of the media used.
Minimum water pressure: 7.25 psig
Maximum water pressure: 232 psig
Maximum oil pressure: 232 psig
Maximum pressure of the confining liquid: 145 psig
Maximum temperature (oil and water): +212 °F
NOTICE!
Exceeding the maximum temperature will result in malfunctioning. A false
alarm will be triggered.
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