MTU 20V4000M73 series, Operating Instructions Manual

Page: 44 / 252

The pressure is so greatly reduced by this and the faulty sealing ring (1) that any leakage is not under pres-
sure.
Plug-in pipe connection (b)
The sleeve (3) covers the joint to prevent lateral spray.
Only leak-off along the line is possible, the pressure is decreases significantly if an O-ring (2) defect occurs.
The connection is confirmed as compliant with SOLAS by DNV and GL.
High-pressure unions
1 Jacketed pipe
2 HP line
3 O-ring
4 Union nut
5 Recess for O-ring
6 Thrust ring
7 Leak overflow bore 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 Ball-type seal area
20 Connection leak fuel
The HP fuel line is sealed by the thrust ring (8).
In case of leakage around the thrust ring (8) or the HP line (5) fuel escapes into the leakage chamber.
The leaking fuel is drained off at atmospheric pressure via the overflow bore (7). The leakage chamber is
sealed by the O-rings (3).
This prevents leaking fuel from escaping.
The connection is confirmed as compliant with SOLAS by DNV and GL.
42 | General Information | MS150046/03E 2018-08
TIM-ID: 0000010057 - 005