Bühler BNK oil cooling systems, with cooler, fan and circulation pump in one unit: BNK 2.4-30, 3.4-30, 4.4-60 and 5.4-60.
Bühler BNK series air/oil coolers with gerotor circulation pump driven by the same motor as the fan. They work off-line: they draw the oil from the reservoir, cool it and return it, independent of the machine return flow.
4-pole motors, IP55; oil up to 80 °C. The stated power is with 40 K difference between oil inlet and air. To choose, calculate the heat to be removed and the flow you want to circulate.
Source: Bühler Oil/air cooler BNK technical data sheet, DE360001, 12/2017.
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