DURCO MARK 3 ISO FRAME MOUNTED ENGLISH 85392719 06-12
Page 10 of 52
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Motor size
and speed
kW (hp)
Typical sound pressure level L
pA
at 1 m reference 20
µ
Pa, dBA
3 550 r/min
2 900 r/min
1 750 r/min
1 450 r/min
Pump
only
Pump
and
motor
Pump
only
Pump
and
motor
Pump
only
Pump
and
motor
Pump
only
Pump
and
motor
<0.55 (<0.75)
72
72
64
65
62
64
62
64
0.75 (1)
72
72
64
66
62
64
62
64
1.1 (1.5)
74
74
66
67
64
64
62
63
1.5 (2)
74
74
66
71
64
64
62
63
2.2 (3)
75
76
68
72
65
66
63
64
3 (4)
75
76
70
73
65
66
63
64
4 (5)
75
76
71
73
65
66
63
64
5.5 (7.5)
76
77
72
75
66
67
64
65
7.5 (10)
76
77
72
75
66
67
64
65
11(15)
80
81
76
78
70
71
68
69
15 (20)
80
81
76
78
70
71
68
69
18.5 (25)
81
81
77
78
71
71
69
71
22 (30)
81
81
77
79
71
71
69
71
30 (40)
83
83
79
81
73
73
71
73
37 (50)
83
83
79
81
73
73
71
73
45 (60)
86
86
82
84
76
76
74
76
55 (75)
86
86
82
84
76
76
74
76
75 (100)
87
87
83
85
77
77
75
77
90 (120)
87
88
83
85
77
78
75
78
110 (150)
89
90
85
87
79
80
77
80
150 (200)
89
90
85
87
79
80
77
80
200 (270)
1
1
1
1
85
87
83
85
300 (400)
–
87
90
85
86
1
The noise level of machines in this range will most likely be of values which require noise exposure control, but typical values are inappropriate.
Note: for 1 180 and 960 r/min reduce 1 450 r/min values by 2 dBA. For 880 and 720 r/min reduce 1 450 r/min values by 3 dBA.
Summary of Contents for Durco Mark 3
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