Replacing Spare Parts - Bominox MINOX-01 Installations- Und Wartungsanweisungen

Bominox, S.A. - Installation and Maintenance Instructions
It is the user's responsibility to establish an inspection plan defining the necessary
intervals and maintenance of these appliances with the aim of guaranteeing their correct
use.
Inspections must be carried out by personnel qualified for the type of appliance and/or installation.
It is recommended to carry out the following actions/checks with the aim of ensuring correct operation
of the Bominox pumps.

Replacing spare parts

In addition to these, also see the attached instructions from the original manufacturer.
Changing the single mechanical seal
A mechanical seal is made up of two parts: the fixed and the turning part. The pump's seal is achieved
through the friction faces of these parts. The use of very abrasive products or especially using the pump
without liquid may damage these faces and/or their joints. In this case the mechanical seal must be
changed.
Disassembly:
Disconnect motor (7), loosen and remove clamp (6), and body (3). Remove the O-ring (13). Loosen and
removed the cap nut (9) fastening the shaft (5) with a spanner or clamp through the flange hatch (1) or
by tapping with the spanner. Remove the impeller (4) and key (11). Remove the turning part of the
mechanical seal (8) through the top of the shaft.
To remove the fixed part, the cover must be removed (2), if necessary tap the flange with a plastic mallet
to remove it. The stationary part of the mechanical seal can be manually removed from its housing.
Check the condition of the shaft (5) to see if it has any notches or wear, in which case it is recommended
to change it.
Assembly:
For assembly, follow the instructions in reverse. Assemble the stationary part of the mechanical seal at
pressure (8) on the housing of the cover (2) and assemble it. Insert the turning part of the mechanical
seal placing a little neutral grease or soapy water on the shaft (5) to help it go in.
Changing the double mechanical seal
The double seal is assembled using a primary seal and a secondary seal acts as a catch. The seals
must always be kept cooled by placing recirculating liquid on the double seal, which must be compatible
with the pumping (in most cases tap water is used). In case of a counter pressure on the seal there must
be pressure of at least 1 bar over that inside the pump. In some cases it may be necessary to install a
pressure tank that must be assembled according to the manufacturer's instructions.
Disassembly:
Disconnect motor (7), loosen and remove clamp (6), and body (3). Remove the O-ring (13). Loosen and
removed the cap nut (9) fastening the shaft (5) with a spanner or clamp through the flange hatch (1) or
by tapping with the spanner. Remove the impeller (4) and key (11). Loosen and remove the screws on
the cover of the double seal (23), with it the stationary part of the first seal will come out. The turning
part of the primary seal will be visible so that it can be removed from the top of the shaft.
The secondary seal (22) is fixed by means of a special nut (24) that must be unscrewed through the
orifices that are machined in it for this purpose using a tool or equipment. The turning part of this second
seal will be exposed for extraction.
To remove the fixed part, the cover must be removed (2), if necessary tap the flange with a plastic mallet
to remove it. The stationary part of the secondary seal can be manually removed from its housing. Check
the condition of the shaft (5) to see if it has any notches or wear, in which case it is recommended to
change it.
Assembly:
For assembly, follow the instructions in reverse. Assemble the stationary part of the two seals in their
respective housings with pressure. Install the cover (2), insert the turning part of the secondary seal (22)
placing a little neutral grease or water on the shaft (5) to help it go in. Screw the special nut (24) until it
is completely fitted. Insert the turning part of the primary seal (8) and install the double seal cover (23)
with the stationary part already fitted, checking that the O-ring (25) is in good condition and correctly
fitted.
EN 12