Flowserve ERPN-M - Manual (Page 10)

ERPN-M USER INSTRUCTIONS ENGLISH 02-08
Page 10 of 37
1.8 Specific machine performance
For performance parameters see section 1.5, Duty
conditions. When the Contract requirement specifies
these to be incorporated into user instructions these
are included here. Where performance data has been
supplied separately to the purchaser these should be
obtained and retained with these user instructions if
required.
1.9 Noise level
When pump noise level exceeds 85 dBA attention
must be given to prevailing Health and Safety
Legislation, to limit the exposure of plant operating
personnel to the noise. The usual approach is to
control exposure time to the noise or to enclose the
machine to reduce emitted sound. You may have
already specified a limiting noise level when the
equipment was ordered, however if no noise
requirements were defined then machines above a
certain power level will exceed 85 dBA.
In such situations consideration must be given to the
fitting of an acoustic enclosure.
Pump noise level is dependent on a number of
factors - the type of motor fitted, the operating
capacity, pipework design and acoustic
characteristics of the building. The levels specified in
the table below are based on measurements
according to EN ISO 3744 for pumps only and not
guaranteed.
The dBA values are based on the pump only. To
consider the noise of the driver, follow the guidelines
on the attached data sheet. For driver noise levels
refer to driver manufactures instruction. They are
Sound Pressure levels at 1 m (3.3 ft) from the directly
driven pump, for "free field over a reflecting plane".
If a pump only has been purchased, for fitting with
your own driver, then the "pump only" noise levels
from the table should be combined with the level for
the driver obtained from the supplier. Consult a Noise
Specialist for this calculation.
For units driven by equipment other than
electric motors or units contained within enclosures,
see the accompanying information sheets and
manuals.