UB USER INSTRUCTIONS ENGLISH 71569247
®
1.9 Noise level
When pump noise level exceeds 85 dB(A) 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 dB(A). In such situations consideration must be given to the fitting of an acoustic enclosure to meet local regulations.
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. Typical sound pressure levels measured in dB, and
The figures are indicative only, they are subject to a +3 dB tolerance, and cannot be guaranteed.
The values are based on the noisiest ungeared electric motors that are likely to be encountered. They represent sound pressure levels at 1 m (3.3 ft) from the directly driven pump, for "free field over a reflecting plane".
If a pump unit 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. If the motor is driven by an inverter it may show an increase in noise level at some speeds. Consult a Noise Specialist for the combined calculation.
For units driven by equipment other than electric
motors or units contained within enclosures, see the accompanying information sheets and manuals.
Typical sound pressure level, dBA, LpA at 1 m reference 20 µPa (LwA sound power 1 pW where LpA > 85 dBA)
Motor size |
| 3550 r/min | 2900 r/min | 1750 r/min | 1450 r/min | |||||
and speed | Pump and | Pump | Pump and | Pump | Pump and | Pump | Pump and | Pump | ||
kW (hp) | motor | only | motor | only | motor | only | motor | only | ||
dBA | dBA | dBA | dBA | dBA | dBA | dBA | dBA | |||
<0.55 (<0.75) | 71 | (88) | 66 (83) | 64 (81) | 62 (79) | 64 (81) | 62 (79) | 63 (80) | 62 (79) | |
0.75 (1) | 74 (91) | 66 (83) | 67 (84) | 62 (79) | 67 (84) | 62 (79) | 63 (80) | 62 (79) | ||
1.1 | (1.5) | 74 | (91) | 68 (85) | 67 (84) | 64 (81) | 67 (84) | 64 (81) | 65 (82) | 64 (81) |
1.5 (2) | 77 | (94) | 70 (87) | 70 (87) | 66 (83) | 70 (87) | 66 (83) | 66 (83) | 66 (83) | |
2.2 (3) | 78 | (95) | 72 (89) | 71 (88) | 68 (85) | 71 (88) | 68 (85) | 68 (85) | 68 (85) | |
3 | (4) | 81 | (98) | 74 (91) | 74 (91) | 70 (87) | 74 (91) | 70 (87) | 70 (87) | 70 (87) |
4 | (5) | 82 | (99) | 75 (92) | 75 (92) | 71 (88) | 75 (92) | 71 (88) | 71 (88) | 71 (88) |
5.5 | (7.5) | 90 (107) | 77 (94) | 83 (100) | 73 (90) | 76 (93) | 73 (90) | 72 (89) | 71 (88) | |
7.5 (10) | 90 (107) | 78 (95) | 83 (100) | 74 (91) | 77 (94) | 74 (91) | 73 (90) | 72 (89) | ||
11 (15) | 91 (108) | 80 (97) | 84 (101) | 76 (93) | 78 (95) | 76 (93) | 74 (91) | 73 (90) | ||
15 | (20) | 92 (109) | 83 (100) | 85 (102) | 79 (96) | 80 (97) | 79 (96) | 76 (93) | 75 (92) | |
18.5 (25) | 92 (109) | 83 (100) | 85 (102) | 79 (96) | 80 (97) | 79 (96) | 76 (93) | 75 (92) | ||
22 | (30) | 92 (109) | 83 (100) | 85 (102) | 79 (96) | 81 (98) | 79 (96) | 77 (94) | 75 (92) | |
30 | (40) | 100 (117) | 85 (102) | 93 (110) | 81 (98) | 84 (101) | 80 (97) | 80 (97) | 76 (93) | |
37 | (50) | 100 (117) | 86 (103) | 93 (110) | 82 (99) | 84 (101) | 80 (97) | 80 (97) | 76 (93) | |
45 | (60) | 100 (117) | 87 (104) | 93 (110) | 83 (100) | 84 (101) | 80 (97) | 80 (97) | 76 (93) | |
55 | (75) | 100 (117) | 88 (105) | 95 (112) | 84 (101) | 86 (103) | 81 (98) | 82 (99) | 77 (94) | |
75 (100) | 100 | (117) | 90 (107) | 95 (112) | 86 (103) | 88 (105) | 81 (98) | 83 (100) | 78 (95) | |
90 (120) | 100 | (117) | 90 (107) | 95 (112) | 86 (103) | 90 (107) | 81 (98) | 85 (102) | 78 (95) | |
110 (150) | 100 | (117) | 91 (108) | 95 (112) | 87 (104) | 91 (108) | 83 (100) | 86 (103) | 79 (96) | |
150 | (200) | 101 | (118) | 92 (109) | 96 (113) | 88 (105) | 91 (108) | 83 (100) | 86 (103) | 79 (96) |
200 | (270) |
| ① | ① | ① | ① | ① | 83 (100) | ① | 80 (97) |
300 | (400) |
| - | - | - | - | ① | 84 (101) | ① | 81 (98) |
500 | (670) |
| - | - | - | - | ① | 85 (102) | ① | 83 (100) |
1000 | (1300) |
| - | - | - | - | ① | 86 (103) | ① | 86 (103) |
1500 | (2000) |
| - | - | - | - | ① | 90 (107) | ① | 88 (105) |
①Motors in this range are generally job specific and noise levels should be calculated based on actual equipment installed. For 960 r/min reduce 1450 r/min values by 5 dBA.
Page 9 of 32