Scavenge Air Box Drain System - Man B&W S50ME-B9.3-TII Project Manual

MAN B&W

Scavenge Air Box Drain System

The scavenge air box is continuously drained
through 'AV' to a small pressurised drain tank,
from where the sludge is led to the sludge tank.
Steam can be applied through 'BV', if required, to
facilitate the draining. See Fig. 14.06.01.
The continuous drain from the scavenge air box
must not be directly connected to the sludge tank
owing to the scavenge air pressure.
DN=15 mm
BV
Steam inlet pressure 3 10 bar.
If steam is not available, 7 bar
compressed air can be used.
Sludge tank for fuel
oil centrifuges
The letters refer to list of 'Counterflanges'
No. of cylinders:
Drain tank capacity, m
3
Fig. 14.06.01: Scavenge air box drain system
MAN B&W 50MC-C/ME-C/ME-B/-GI
Deck / Roof
DN=50 mm
5-6 7-9
0.3 0.4
The pressurised drain tank must be designed to
withstand full scavenge air pressure and, if steam
is applied, to withstand the steam pressure avail-
able.
The system delivered with and fitted on the engine
is shown in Fig. 14.03.02 Scavenge air space,
drain pipes.
If the engine is equipped with both 'AV' and
'AV1' connections, these can be connected
to the drain tank.
The 'AV' and AV1' connection can also be
connected to the drain tank separately.
AV
Normally open.
To be closed in case of
fire in the scavenge air box.
MAN Diesel
AV1
DN=65 mm
Drain
tank
Normally closed. Tank to be emptied
during service with valve open.
14.06
Page 1 of 1
DN=50 mm
Min. 15°
Orifice 10 mm
1,000 mm
079 61 03-0.4.1
198 76 93-3.2