Crankcase Ventilation - Man L23/30DF Project Manual

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L28/32S, L27/38S, L23/30S, L21/31S, L16/24S, L23/30DF, V28/32S-DF, L28/32DF,
V28/32H, V28/32S, L16/24, L21/31, L23/30H, L27/38, L28/32H
If the combustion air flow rate at 100 % engine load
is stated in [kg/h] this can be converted to [m³/h]
with the following formula (Tropic Reference Condi-
tion) :
Example :
Engine with a mechanical output of 880 kW and
combustion air consumption of 6000 [kg/h] corre-
sponds to :
The crankcase ventilation flow rate will then be in
the range of 19.2 – 27.4 [m³/h]
The maximum crankcase backpressure measured
right after the engine at 100 % engine load must not
exceed 3.0 [mbar] = 30 [mmWC].

Crankcase ventilation

MAN Diesel & Turbo
1699270-8.7
Page 2 (2)
2015.04.15 - (* Mk2)