WÄRTSILÄ Vasa R22, Instruction Manual

Page: 206 / 297

the cock (7). At normal operation, both sides of the filter are
used in parallel to provide maximum filtration. Fig 17-3A
shows the valve in this position. When changing cartridges during
operation one side can be closed. Fig 17-3B shows the position of
the valve when the right side of the filter is closed.
The arrows in the figure show the flow through the filter. The
fuel flows first through a cartridge (3) made of special paper,
filtering off particles larger than 10 to 15
µ
m, then through an
insert (4) of pleated wire gauze around a firm perforated case.
The wire gauze insert, with a mesh size of 40
µ
m, serves as a safety
filter in case of failure of the paper element.
Fuel filter
6
B
7
8
3
5
4
1 2
3
4
A
1. Air vent screw
2. Filter cover
3. Filter cartridge
4. Wire gauze insert
5. Guide ring
6. Drain plug
7. Cock
8. Three way valve
Fig 17-3
2217539220
22-9601 Fuel system 17
VASA 22 17 - 5