BALTECH VP-3470
Operation manual
Safety measures
13
Table 1.
Safety measures for some types of machines
Machine
class
Example
Safety measures
Turbines
Steam or gas turbine Stop the machine to add a correction weight
and apply a phase mark. Make sure that the
shaft is not bent. For this purpose rotate the
shaft for a time to achieve the temperature
equalization.
Electric
motors
Motor for
high
performance fan
Some types of the electric motors are
allowed to be started up only a limited
number of times per hour. The speed taker-
up from zero to maximum amount can be
uncontrolled. Therefore the size of the trial
weights should be selected in such a way
that the machine can’t be damaged in case
of their installation in improper position.
Large fans
High-performance
induced draft fan
The air current generated be the fan
during the balancing procedure should
be distributed properly. Sometimes it is
necessary to close the air valve which can
lead to a breakaway. The fluids fed by the
fan can be hot or contain harmful substances
therefore an operator should not access the
fan (to install the correction weight, etc.) till
the operation conditions are safe.
