MAN B&W L28/32H, Manual

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08028-0D\H5250\94.08.12
B 11 00 0
The injection pumps are installed on the roller guide
housings directly above the camshaft, and they are
activated by the cams on the camshaft through roller
guides fitted in the roller guide housings.
The amount of fuel injected into each cylinder unit is
adjusted by means of the governor, which maintains
the engine speed at the preset value by a continuous
positioning of the fuel pump racks, via a common
regulating shaft and spring-loaded linkages for each
pump.
The injection valve is for "deep" building-in to the
centre of the cylinder head.
The injection oil is supplied from the injection pump
to the injection valve via a double-walled pressure
pipe installed in a bore, in the cylinder head.
This bore has an external connection to conduct the
leak oil from the injection valve and high-pressure
pipe to the waste oil system.
A bore in the cylinder head vents the space below the
bottom rubber sealing ring on the injection valve,
thus preventing any pressure build-up due to gas
leakage, but also unveiling any malfunction of the
bottom rubber sealing ring for leak oil.
Waste Oil System
Waste and leak oil from the comparements, fuel
valves and engine feed pump is led to a fuel leakage
alarm unit.
L28/32H
Internal Fuel Oil System
1607543-9.5
Page 2 (2)
99.48
The alarm unit consists of a box with a float switch for
level monitoring. In case of a larger than normal
leakage, the float switch will initiate alarm. The
supply fuel oil to the engine is lead through the unit
in order to keep this heated up, thereby ensuring free
drainage passage even for high-viscous waste/leak
oil.
Optionals
Besides the standard components, the following
standard optionals can be built-on:
– Engine driven fuel oil pump
Pressure differential alarm high
– PDAH 43-40 Fuel oil, inlet and outlet filter
Pressure differential transmitting
– PDT 43-40 Fuel oil, inlet and outlet filter
Pressure alarm low
– PAL 40 Fuel oil, inlet fuel oil pump
Pressure transmitting
– PT40 Fuel oil, inlet fuel oil pump
Temperature element
– TE40 Fuel oil, inlet fuel oil pump
Data
For pump capacities, see D 10 05 0 "List of Capa-
cities".
Set points and operating levels for temperature and
pressure are stated in B 19 00 0 "Operating Data and
Set Points".