Crankcase Ventilation System - WÄRTSILÄ WÄRTSILÄ 26 Product Manual

Wärtsilä 26 Product Guide
Design data:
Fineness
7.3.5 Lubricating oil pump, stand-by (2P04)
The stand-by lubricating oil pump is normally of screw type and should be provided with an
overflow valve.
Design data:
Capacity
Design pressure, max
Design temperature, max.
Lubricating oil viscosity
Viscosity for dimensioning the electric
motor
7.4

Crankcase ventilation system

The purpose of the crankcase ventilation is to evacuate gases from the crankcase in order to
keep the pressure in the crankcase within acceptable limits.
Each engine must have its own vent pipe into open air. The crankcase ventilation pipes may
not be combined with other ventilation pipes, e.g. vent pipes from the system oil tank.
The diameter of the pipe shall be large enough to avoid excessive back pressure. Other possible
equipment in the piping must also be designed and dimensioned to avoid excessive flow
resistance.
A condensate trap must be fitted on the vent pipe near the engine.
The connection between engine and pipe is to be flexible.
Design data:
Flow
Backpressure, max.
Temperature
Fig 7-7
Wärtsilä 26 Product Guide - a9 - 7 September 2016
0.5...1.0 mm
see Technical data
0.8 MPa (8 bar)
100°C
SAE 40
500 mm
see Technical data
see Technical data
80°C
Condensate trap
(DAAE032780B)
7. Lubricating Oil System
2 /s (cSt)
The size of the ventilation pipe (D2) out
from the condensate trap should be
bigger than the ventilation pipe (D) com-
ing from the engine.
For more information about ventilation
pipe (D) size, see the external lubricating
oil system drawing.
The max. back-pressure must also be
considered when selecting the ventilation
pipe size.
7-11