Operating instructions B-Series
Version 2.4, En Page 47 of 81 21-10-2005
7.11 Protective cover
Extra point(s) for attention with ATEX pumps.
K9.
S10.
Ensure the correct design and material choice of the protective cover. ∗
∗∗
∗
o No dangerous dust accumulation may take place. A design open at the
bottom is preferred.
o
The protective cover must fit widely around the coupling in case of dents,
and to make no contact with any dust layer on the inside of the protective
cover.
For cat. 2: choice of material no more than 7.5% magnesium (see EN 13463-1,
8.2).
Checking of alignment, damage to protective cover.
∗
∗∗
∗
With an Ex-pump (unit) supplied by BBA Pompen these aspects are ensured for the application
indicated by the client with the associated indicated medium.
Operating the pump without a coupling protective cover is not allowed. If a
protective cover is not supplied by the supplier, the owner himself must
provide one.
Guarding moving parts:
Before starting the pump fit a protective cover over the coupling or belt drive.
This must be in accordance with standard EN 953 (General requirements for
the design and construction of guards).
If the pump is used in an explosion-dangerous space, the material of the
protective cover must be suitable for the environment. When the protective
cover comes into contact with coupling, pump motor shaft, coupling rubber or
other turning parts the protective cover may not cause sparks.
With a rolling bearing temperature higher than 70°C the bearing support and the rolling bearings must be
sufficiently cooled by well ventilated air. Take account here of the construction of the protective cover.
7.12 Belt drive
With a belt drive the shaft and bearings are put under extra load. Check if the loads on the shaft end are
not exceeded. For the maximum permissible loads on the shaft end, see technical specifications B- series.
If the driving forces are too great, the belt pulley must be placed on an intermediate shaft with its own
bearings. Tighten the V-belt so that in the middle the belt can be pressed in a maximum of 1 cm, se
technical specifications B-Series. Avoid too tight tension. This damages the shafts and the bearings.
After setting up the pump/pump unit the alignment of the pump and motor belt pulley must be checked
and adjusted again if necessary. Make sure that the pulleys are on one plane, see technical specifications
B-Series. Before starting the pump fit a protective cover over the coupling or belt drive.
In an explosive environment the belt drive must suffice with regard to the special requirements.
For this see standard EN 13463-5.
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