BOMBAS IDEAL CPH Série Notice D'utilisation Et D'entretien page 29

Bombas Ideal, S.A.
11.10-Installing stuffing box packing
Refer to stuffing box data to ascertain size and number of rings required.
If the packing is to be cut from a coil or long length:-
a) Wrap the packing around a dummy shaft, equal to the shaft sleeve diameter.
b) To assist in cutting rings, two guide lines parallel to the shaft axis and separated by a
distance equal to the packing section may be drawn on the spiral.
c) Cut the rings from the spiral at an angle of 45° diagonally across the guide lines no
gap is left between the ends.
Insert the first ring and tap it to the bottom of the stuffing box. Each following ring should be installed in
the same manner and positioned in the stuffing box so that the split is advanced 90 Deg.
Install the lantern ring in its proper position to align with the sealing connection allowing for vement of the
ring deeper in to the box as the packing is compressed.
When the correct number of rings have been inserted, the last packing ring should not protrude past the
stuffing box face, so that the gland may be properly seated in the stuffing box bore.
Bring the gland follower up securely against the last packing ring and tighten the nuts evenly to
give pressure.
Turn the shaft to ensure it does not bind on the bore or the gland follower.
Pressurise the stuffing box, ensuring air is not trapped. A packed gland must leak and leakage should
take place commencing soon after the stuffing box is pressurised.
Until steady leakage takes place, the pump may overheat. If this happens, the pump must be stopped and
allow to cool and, when restarted, leakage should take place. If it does not, this operation should be
repeated. Gland nuts should not be slackened
After the pump has been running for 10 minutes with steady leakage, tighten the gland nuts by one sixth
of a full turn. Continue to adjust at ten minute intervals, each time evenly by one sixth of a full turn, until
leakage is reduced to an acceptable level. There should be leakage of 60 to 80 drops per minute.
CAUTION:
Excessive gland pressure will cause damage by cutting off lubrication to the packing and packing will burn
and damage the sleeve.
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