English (GB)
15
7.4 Filtration
To reach an acceptable pump life, we recommend
the pumped liquids to be filtered to cleanliness class
according to ISO 4406/99. The recommended
cleanliness class depends on pumping pressure and
abrasive class 1 to 7. Process examples for abrasive
classes are shown in the table below.
The additional specifications for filter mesh and flow
rate are guiding values for orientation. The decisive
factor is the cleanliness of the liquids indicated by
the cleanliness class.
To avoid damage by solid particles, we advise to use
a filter mesh of 65
μ
m (nominal, two-dimensional) and
finer.
The data in below table are reference values. The
actual airborne sound pressure level depends
especially on the installation conditions.
Abrasive class
1
2
3
4
5
6
7
Material
Steel, cast
iron, Al
Steel, cast
iron, Al
Al (Si > 5 %)
Steel
Steel, hard
Tungsten
carbide
Titanium
Process
Drilling
Turning/
milling
Turning/
milling
Grinding
Grinding
Grinding
Grinding
Tool
High speed
steel (HSS)
Tungsten
carbide
Tungsten
carbide
Corundum
Corundum
CBN
Diamond
Pressure level
≤
120 bar
21/19/16
21/19/16
21/19/16
20/18/15
20/18/15
19/17/14
18/16/13
≤
30
μ
m
≤
25
μ
m
≤
20
μ
m
≤
17
μ
m
≤
15
μ
m
≤
10
μ
m
≤
6
μ
m
≤
30 mg/l
≤
25 mg/l
≤
20 mg/l
≤
15 mg/l
≤
10 mg/l
≤
5 mg/l
≤
3 mg/l
≤
90 bar
22/20/17
22/20/17
22/20/17
21/19/16
21/19/16
20/18/15
19/17/14
≤
50
μ
m
≤
45
μ
m
≤
40
μ
m
≤
30
μ
m
≤
20
μ
m
≤
15
μ
m
≤
10
μ
m
≤
60 mg/l
≤
50 mg/l
≤
40 mg/l
≤
30 mg/l
≤
20 mg/l
≤
10 mg/l
≤
5 mg/l
≤
60 bar
23/21/18
23/21/18
23/21/18
22/20/17
22/20/17
21/19/16
20/18/15
≤
80
μ
m
≤
75
μ
m
≤
60
μ
m
≤
50
μ
m
≤
40
μ
m
≤
20
μ
m
≤
15
μ
m
≤
120 mg/l
≤
100 mg/l
≤
80 mg/l
≤
60 mg/l
≤
40 mg/l
≤
20 mg/l
≤
10 mg/l
≤
30 bar
24/22/19
24/22/19
24/22/19
23/21/18
23/21/18
22/20/17
21/19/16
≤
150
μ
m
≤
120
μ
m
≤
100
μ
m
≤
80
μ
m
≤
60
μ
m
≤
40
μ
m
≤
20
μ
m
≤
250 mg/l
≤
200 mg/l
≤
160 mg/l
≤
120 mg/l
≤
80 mg/l
≤
40 mg/l
≤
20 mg/l
Pump
L
pA
[dB(A)] for pump at speed
2900 [min
-1
]
3500 [min
-1
]
MTS 20
56
58
MTS 40
59
61
MTS 80
61
63
MTS 140
64
66
MTS 210
67
69
MTS 280
69
71
MTS 440
72
74
Summary of Contents for MTS 140
Page 1: ...MTS Installation and operating instructions GRUNDFOS INSTRUCTIONS...
Page 24: ...Appendix 24 MTS 20 40 exploded view Fig 2 Exploded view of MTS 20 40 TM04 2629 5011...
Page 26: ...Appendix 26 MTS 20 model B exploded view Fig 4 Exploded view of MTS 20 model B TM05 2391 5011...
Page 28: ...Appendix 28 MTS 80 140 exploded view Fig 6 Exploded view of MTS 80 140 TM04 2630 5011...
