Replacing Spare Parts - Bominox SOLID-ATEX Instrucciones De Instalación Y Mantenimiento

Bominox, S.A. - Installation and Maintenance Instructions
4 Maintenance
Defective or incomplete maintenance may lead to incorrect operation of the machine (with increased
incidence and therefore costs from insufficient quality).
Good maintenance enables incidents to be reduced in the process and at the same time
guarantees compliance of the product's requirements and specifications.
National regulations about maintenance, service, inspection and repair of appliances for
explosive atmospheres, as well as general engineering rules must be observed.
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.
The provisions of the UNE-EN 60079-17:2014 standard may be used as a guide, with the aim of
establishing an inspection plan.
It is recommended to carry out the following actions/checks with the aim of ensuring correct operation
of the Bominox pumps.
When the inspections are of a "Detailed" grade or in some cases a "Close" grade
inspection, the appliances must be totally out of service, electrically and mechanically.

4.1 Replacing spare parts

In addition to these, also see the attached instructions from the original manufacturer.
4.1.1 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 the motor (7), loosen and remove screws (26) and suction cover (2). Remove the O-ring
(12). Loosen and remove the locknut (9) fastening the shaft (5) with a spanner or clamp through the
body-flange hatch (1). 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, remove the screws (23) on the seal cover (10) through the side opening of the
body-flange. It must be extracted using one of the screws through the threaded orifice of the back ring
(3) and removing the cover little-by-little. 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 fixed part of the mechanical seal (8) on
the seal cover (10) at pressure and insert it into the orifice for the body-flange shaft (1) to the end,
ensuring that the centring elements of the seal cover match the corresponding orifices in the back ring
(3). Screw the seal cover on the back ring and 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.
4.1.2 Changing the double mechanical seal
The double mechanical seal is made up of three parts; two fixed and one turning. The friction between
the faces of the fixed front part with the turning part isolates the pumped product from the cooling liquid
of the seal. The friction between the faces of the fixed back part with the turning part isolates the cooling
liquid from the motor seal.
The pump must have an API Plan 62 connection (or API Plan 52 in some cases) above the chamber for
cooling the seal. The cooling fluid must be clean, compatible with the pumped liquid and the pump's
materials. A flow control must be installed in the circuit and it must control that the temperature is always
maintained at a minimum of 15ºC below its boiling temperature.
EN 14