Man B&W S80ME-C7 User Manual

MAN B&W 8.09
Page  of 4
MAN Diesel
MAN B&W ME/ME-C/ME-GI engines 198 48 523.2
Separate System for Hydraulic Control Unit
As an option, the engine can be prepared for the
use of a separate hydraulic control oil system
Fig. 8.09.0.
The separate hydraulic control oil system can be
built as a unit, or be built streamlined in the engine
room with the various components placed and
fastened to the steel structure of the engine room.
The design and the dimensioning of the various
components are based on the aim of having a reli-
able system that is able to supply lowpressure oil
to the inlet of the enginemounted highpressure
hydraulic control oil pumps at a constant pres-
sure, both at engine standby and at various en-
gine loads. The quality of the hydraulic control oil
must full the same grade as for our standard in-
tegrated lube/cooling/hydrauliccontrol oil system,
i.e. ISO 4406 XX/6/3 equivalent to NAS 638
Class 7.
The hydraulic control oil system comprises:
 Hydraulic control oil tank
2 Hydraulic control oil pumps (one for standby)
 Pressure control valve
 Hydraulic control oil cooler, watercooled by the
low temperature cooling water
 Threeway valve, temperature controlled
 Hydraulic control oil lter, duplex type or auto-
matic selfcleaning type
 Hydraulic control oil ne lter with pump
 Temperature indicator
 Pressure indicator
2 Level alarms
Valves and cocks
Piping.
Hydraulic control oil tank
The tank can be made of mild steel plate or be a
part of the ship structure.
The tank is to be equipped with ange connec-
tions and the items listed below:
 Oil lling pipe
 Outlet pipe for pump suctions
 Return pipe from engine
 Drain pipe
 Vent pipe.
The hydraulic control oil tank is to be placed at
least  m below the hydraulic oil outlet ange, RZ.
Hydraulic control oil pump
The pump must be of the displacement type (e.g.
gear wheel or screw wheel pump).
The following data is specied in Fig. 8.09.02:
• Pump capacity
• Pump head
• Delivery pressure
• Working temperature
• Oil viscosity range.
Pressure control valve
The valve is to be of the selfoperating ow control-
ling type, which bases the ow on the predened
pressure set point. The valve must be able to react
quickly from the fullyclosed to the fullyopen posi-
tion (t
max
= 4 sec), and the capacity must be the
same as for the hydraulic control oil lowpressure
pumps. The set point of the valve has to be within
the adjustable range specied on a separate
drawing.
The following data is specied in Fig. 8.09.02:
• Flow rate
• Adjustable differential pressure range across
the valve
• Oil viscosity range.
Hydraulic control oil cooler
The cooler must be of the plate heat exchanger or
shell and tube type.
The following data is specied in Fig. 8.09.02:
• Heat dissipation
• Oil ow rate
• Oil outlet temperature
• Maximum oil pressure drop across the cooler
• Cooling water ow rate
• Water inlet temperature
• Maximum water pressure drop across the cooler.
Temperature controlled threeway valve
The valve must act as a control valve, with an ex-
ternal sensor.
The following data is specied in Fig. 8.09.02:
• Capacity
• Adjustable temperature range
• Maximum pressure drop across the valve.

Man B&W S80ME-C7 Specifications

General

Brand	Man
Model	B&W S80ME-C7
Category	Engine
Language	English