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8.3
Purifier Operation
8
Operating
8.3.2
Selection of gravity disc
The separator is delivered with a set of gravity
discs with different diameters for purification
operation. The hole diameter of the gravity disc
sets the position of the oil/water interface in the
separator. The separation efficiency can be
optimized by selection of the correct diameter
for each oil quality.
As a guide the Gravity disc nomogram can be
used. The size of the first gravity disc to be tried
can be read directly from the nomogram.
The best separation results are obtained by
using a gravity disc with as large size as
possible, which will not cause a broken water
seal in the bowl or an emulsification in the water
outlet.
The presence of salt water in the oil may
demand the use of a gravity disc with bigger
hole than indicated in the nomogram. The
nomogram is based on the properties of fresh
water in the oil.
For operating the separator as a clarifier the
diameter of the disc should be 40 mm.
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