Description
Figure 1: Pneumatic diagram for 3-way changing valves V1 & V2.
The fuel change-over system consists of two
remote controlled and interconnected 3-way valves,
which are installed immediately before each Gen-
Set. The 3-way valves “V1-V2” are operated by an
electrica/pneumatic actuator of the simplex type,
with spring return and a common valve control box
for all GenSets.
The flexibility of the system makes it possible, if
necessary, to operate the GenSets on either diesel
oil or heavy fuel oil, individually by means of the L-
bored 3-way valves “V1-V2”.
The control box can be placed in the engine room
or in the engine control room.
To maintain re-circulation in the HFO flow line, when
the GenSet is operated on MDO, is a by-pass valve
installed between the fuel inlet valve “V1” and the
fuel outlet valve “V2” at each GenSet as shown in
fig 1.
Valve control box
The electrical power supply to the valve control box
is 3 x 400 Volt - 50 Hz, or 3 x 440 Volt - 60 Hz,
depending on the plant specification, and is estab-
lished in form of a single cable connection from the
switchboard.
Due to a built-in transformer, the power supply volt-
age will be converted to a 24 V DC pilot voltage for
serving the relays, contactors, and indication lamps.
Furthermore the 24 V DC pilot voltage is used for
operating the fuel changing valves with an electri-
cally/pneumatically operated actuator of the simplex
type with spring return.
The mode of valve operation is:
HFO-position: Energized
MDO-position: De-energized
MAN Diesel & Turbo
1624467-7.3
Page 1 (2)
HFO/MDO changing valves (V1 and V2)
E 11 10 1
L27/38S, L16/24S, L21/31S, L23/30S, L23/30DF, L28/32S, L28/32DF, V28/32H,
V28/32S, L16/24, L21/31, L23/30H, L27/38, L28/32H
2015.11.27
Summary of Contents for L23/30DF
Page 1: ...L27 38S Project Guide Power Plant Four stroke GenSet...
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Page 9: ...MAN Diesel Turbo I 00 Introduction Page 1 1 I 00 Introduction 2018 04 13 en...
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Page 31: ...MAN Diesel Turbo D 10 General information Page 1 1 D 10 General information 2018 04 13 en...
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Page 59: ...MAN Diesel Turbo B 10 Basic diesel engine Page 1 1 B 10 Basic diesel engine 2018 04 13 en...
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Page 85: ...MAN Diesel Turbo B 11 Fuel oil system Page 1 1 B 11 Fuel oil system 2018 04 13 en...
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Page 173: ...MAN Diesel Turbo B 13 Cooling water system Page 1 1 B 13 Cooling water system 2018 04 13 en...
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Page 207: ...MAN Diesel Turbo B 14 Compressed air system Page 1 1 B 14 Compressed air system 2018 04 13 en...
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Page 217: ...MAN Diesel Turbo B 15 Combustion air system Page 1 1 B 15 Combustion air system 2018 04 13 en...
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Page 227: ...MAN Diesel Turbo B 16 Exhaust gas system Page 1 1 B 16 Exhaust gas system 2018 04 13 en...
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Page 269: ...MAN Diesel Turbo B 17 Speed control system Page 1 1 B 17 Speed control system 2018 04 13 en...
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Page 293: ...ENGINE AUTOMATION MAN Diesel Turbo SE SaCoSone GENSET System description Revision 1 5...
Page 306: ...MAN Diesel Turbo SaCoSone GENSET SaCoSone GENSET Communication from GenSet Revision 1 7...
Page 309: ...MAN Diesel Turbo Table of Contents...
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Page 327: ...MAN Diesel Turbo B 20 Foundation Page 1 1 B 20 Foundation 2018 04 13 en...
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Page 335: ...MAN Diesel Turbo B 21 Test running Page 1 1 B 21 Test running 2018 04 13 en...
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Page 341: ...MAN Diesel Turbo E 23 Spare parts Page 1 1 E 23 Spare parts 2018 04 13 en...
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Page 351: ...MAN Diesel Turbo P 24 Tools Page 1 1 P 24 Tools 2018 04 13 en...
Page 379: ...MAN Diesel Turbo B 50 Alternator Page 1 1 B 50 Alternator 2018 04 13 en...
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