
Operating manual liquid ring vacuum pumps and compressors series TRH - TRS - TRM - TRV - SA & Systems type HYDROSYS - OILSYS
21
Noise level
(sound pressure level measured at 1 m distance, without motor, with pump installed in the system and
sound power level L
w
) for pump series TRH, TRM, TRV when operating at 80 mbar and pump series TRS when
operating at 250 mbar with motor at 50 Hz operating speed.
The values can change depending on the installed motor. Contact POMPETRAVAINI for further information.
The class of vibration level
(values rms mm/s) show the limit values for the continuous working of the pump if properly
installed. For higher values it needs to proceed with maintenance of the pump following the table below.
Continuous
working
Preventive
maintenance
Extraordinary
maintenance
Class V1
< 3,5
(3,0 for TRM)
> 3,5 (3,0 TRM)
< 7 (4,5 TRM)
> 7 (4,5 TRM)
Class V2
< 7
> 7
< 11
> 11
- Weights are for pumps fitted with Mechanical Seals and in Cast Iron materials (tolerance
10%).
- The assemblies (Monoblock and with Baseplate) are suitable for 50 Hz motors, except where otherwise noted.
Indicated total weights for the assemblies are without motors.
- The installed motor size cover the whole performance curve when operating as vacuum pump.
- The electric motors over the frame size 315 M are not unified.
- For exact weights refer to the specific motor manufacturer data.
In order to have approximate values of the noise level for tha pump-motor assembly the sound power level of the motor
and the pump can be added. The tab. 5 shows some values of the motor noise level. The addition has to be calculated
using the diagram below.
In order to get the total sound power level it is necessary to calculate the difference between the pump and motor noise
level; by that value calculate, from the following diagram, the increment that will have to be added to the higher value of
the power sound level. Ex: motor 80 dB and pump 75 dB, level difference 5 dB, increment 1,2 dB, total power sound
level 81,2 dB. Taking into account that the noise level depends on several factors, contact POMPETRAVAINI to know
more accurate values.