vention when the limit values are exceeded must
be FAILURE SAFE.
TAB.1: Classification of the maximum surface tem-
perature for apparatuses belonging to group II G (in
accordance with the EN 13463-1 norm)
Gas or vapour
Temperature Maximum
pump mix ignition
classification surface temperature temperature
[°C]
[°C]
T1
450
>450
T2
300
>300
T3
200
>200
T4
135
>135
T5
100
>100
T6
85
>85
TAB. 2: Maximum temperature of the fluid in accor-
dance with the temperature classification
Maximum temperature of the
Temperature
fluid
[°C] classification
90 / 110 *
T1
90 / 110 *
T2
90 / 110 *
T3
80
T4
*) Technical datum given in paragraph of the User
and Maintenance Manual of the product 3SF-3-
LSF-3PF-3LPF.
8. MAINTENANCE AND REPAIRS
Please refer to paragraph of the instruction booklet
for information on maintenance and repairs.
In addition, the pump must never be cleaned using
dry cloths (rubbing with dry cloths made of pure
polyamide material or cotton, for example, can
cause electric discharges).
Some pump models have a bearing on the joint.
No maintenance needs to be carried out on the
bearings, which should work for 10,000 hours at a
temperature of 40°C without problems.
When replacing or controlling the bearings, the
user must contact the retailer or the help service.
The same is true for the seal.
Verify, proportionally to the operation conditions,
that the compression ratio is lower than the spon-
3SF-3LSF-3PF-3LPF – 9
taneous ignition limit of the processed fluid.
Correct motor alignment is indispensable for pre-
venting vibrations and faulty bearings.