Nordson VDK-MIDI TYPE 6, Operating Instructions Manual

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12
Type 6
E 2010
Gear Pump
Fitting packings
Clean the stuffing box thoroughly before inserting the packing rings. Care
should be taken to see that the working surfaces are perfectly smooth (no
scores). An surface defects should in priniple not be greater, if this is
possible, than R
a
0,50
µ
m.
Insert the finished rings one after the other into the seal chamber with
staggered cut ends and tightem them by means of the stuffing pressure
flange or the press screw.
Tightem the stuffing pressure flange or the press scew so that the packing is
adapted to the stuffing box. Then loosen the nuts and tightem them once
more.
Installing of the packing rings:
Form--pressed packing rings should be treated very carefully when installing
them so that the sealing properties are not affected due to unnecessary
folding of cross section. If the rings cannot be inserted from the frontside,
the ends should be folded back along the shaft until they slide over it.
Seperating of the rings in radial direction should be as little as possible.
Installing by inserting the cut ends (see fig. Below)--
When the pump is running, tightem the nuts carefully (1/8 or 1/4 of a turn
each time) and reduce leaks to the necessary minimum.
Proper adjustment of the packing and correct setting of the temperature of
the stuffing box are the determining factors in the packings working life.
Care taken at the start will be amply repair by the pumps working
trouble--free, time saved on maintenance, equipment protection, and by
made in packing costs.