Flowserve MSP Manual de usuario descargar pdf (Pagina 10)

MSP USER INSTRUCTIONS ENGLISH - 07/14

Page 10 of 35

dB(A) Value 63 125 250 500 1K 2K 4K 8K

4000 rpm 70 64 64 62 62 60 55 50 50

5000 rpm 72 62 66 66 64 64 64 62 57

6000 rpm 76 70 70 68 68 66 61 56 56

7000 rpm 78 68 72 72 70 70 70 68 63

8000 rpm 80 70 74 74 72 72 72 70 65

Sound pressure readings are for information only and are not subject to guarantee by Flowserve.

Decibel readings do not include driver or system noise.

Pump tested at 100% of the best efficiency point at max.impeller diameter with water.

dB correction for combining noises (pump+motor)

Difference between two

levels to be combined, dB

Add to the higher level to obtain

the combined noise level,dB

Note :

1) The values showed are measured at a distance of 1 mt. (horizontally) from major pump

surfaces and 1.5 mt. above the floor.

2) The values shown are expressed in dB.

3) For Noise Test Procedure refer to Works Standard L-109-0

4) The values shown have been derived from actual noise-test data and are based on the following conditions:

Equipment is located in a free field above a reflecting plane in which the reductionin noise level

in all directions is 6db in each octave band for each doubling of distance.

Background noise is 10dB minimum below all noise levels in each octave band.

The values shown are at a distance of 1 meter (horizontally) from the major pump surface and

1,5 meters above the floor, using a standard pressure reference of 0,00002 newton per square meter.

Overall noise level, dB(A) is determined at points of maximum noise level and the values of all

mid-band frequences are basis A scale readings.

When the required condition flow is outside the range of 75 to 125% BEP, a part load correction (PLC) must be

added to the noise level as follows:

Percent of BEP @ required

impeller diameter

PLC in

74 to 62 or 126 to 136 +1

61 to 50 or 137 to 150 +2

+437 to 25

1 0.5 0

49 to 38

3 2.5 2 1.5

Octave MID_BAND Frequency, HZ

0 1 2 4 6 9 10

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 34 35

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Flowserve MSP Manual de usuario Pagina 10