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High-pressure unions
1 Jacketed pipe
2 HP line
3 O-ring
4 Union nut
5 Recess for O-ring
6 Thrust ring
7 Leakage overflow bore
The HP fuel line is sealed by the thrust ring (8).
If leakage in the area of the thrust ring (8) or the HP line (5) occurs, the emerging fuel is routed to the
leakage chamber.
Leak fuel is allowed to escape without pressure via the leakage overflow bore (7). The leakage chamber
is sealed toward the outside by the O-rings (3).
This prevents leaking fuel from escaping.
The union is confirmed as being SOLAS-compliant by DNV and GL.
26 | General Information | MW15550/06E 2012-02
8 Thrust ring
9 Union nut
10 Union nut
11 Connecting piece
12 Snap ring
13 Thrust ring
14 Shims
15 Union nut
16 Thrust ring
17 External pipe of HP line
18 Internal pipe of HP line
19 Spherical sealing area
20 Leak fuel connection
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