IMP Pumps CL, CLD, CB - Manual (Page 21)

-21-
GB
and the parallelism between the shaft
and the casing.
• The shaft must be treated within the
Rmax 5 ľm (Ra max=0.8 or N6)
values, other surfaces that are
important for the incorporation must
be treated better than Rz 10 ľm (Ra
max=2.5 or N7/N8).
• All edges, plates, and part surfaces
being exposed to the mechanical seal
must be smoothened or rounded (e.g.
2 mm x 30 degrees by DIN 24960).
• Installation must be done in
cleanliness and very carefully. No
force may be used, as there is the
danger of plastic deformation,
cracking, and breakage of the ceramic
material.
• The installation or dismantling
sequence of the mechanical seal
should be adapted to the pump
construction.
• To reduce friction during installation
all plate rubbers that are laid on the
shaft should be moistened with water
or alcohol, or they should be covered
with silicone grease.
• There are special instructions for
storage and handling of elastic
materials: Natural rubber must not
come into contact with mineral-
based oils and lubricants!
• The stator is not foreseen for plastic
deformation as breakage can occur.
• Flat surfaces must not be unclean or
soiled with oils, but must be dry, dust
free and carefully installed.
• For the MG variation, the elastic
materials should be moistened with
water and pushed circularly onto the
shaft. Oils and lubricants must not
be used! Pressure may be applied
only to the edges of the rounds parts.
After installing all the parts, it is
necessary to check if the seal has
adapted well.
• The regulatory materials do not
require maintenance if we know the
overlap position. A forcible circulation
of the pump where the seal is
installed is necessary with warm
medium to prevent deposits on the
single seals in a compressed state.
• All the air in the seal casing for
internal use must be carefully bleed
out, and the mechanical seal must be
completely submersed in the medium
(there can be no dry run!)
7.3 Spare parts
Please contact the manufacturer or
maintenance service for spare parts,
and give the pump type, serial number,
necessary part or half product for
replacement, and the desired amount in
your order.