Underpressure Measurement On Filter Silencer - ABB TPL85-B12 Operation Manual

Operation Manual / TPL73-B.. - 85-B11/ -B12
4 Operation / 4.6 Underpressure measurement on filter silencer

4.6 Underpressure measurement on filter silencer

4.6.1 U-tube manometer on filter silencer (if present)
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A U-tube manometer can be ordered from ABB Turbo Systems for meas-
uring the negative pressure at the filter silencer.
The measurement can be used for the following purposes:
¡
To measure the correction factor for calculating the turbocharger ef-
ficiency during the engine acceptance test.
¡
The use of a filter mat on the filter silencer can cause a loss of pres-
sure. A significant pressure loss indicates an increase in dirt build-up
in the filter material.
81000 Filter silencer
81050 U-tube manometer
A [mm H O] Pressure loss / Pressure difference
2
With a clean filter silencer (and clean filter mat, if provided), the max-
imum pressure loss (A) is 120 mm H
When the pressure loss (A) has reached 200 mm H
Clean filter silencer.
u
NOTICE
Reading off pressure loss
The measuring rod on the U-tube manometer can be withdrawn to the
bottom water level so that the pressure differential (A) can be easily
read off.
The U-tube manometer can be read off more easily if slightly coloured
water is poured in.
HZTL2480_EN
O at full load.
2
O:
2
Revision D July 2018