Grundfos MTS Serie Manual De Instrucciones página 18

7.1.4 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 recommend
that you use a filter mesh of 65 μm (nominal,
two-dimensional) and finer.
1
Steel, cast
Material
iron, Al
Process Drilling
High-speed
Tool
steel (HSS)
Pressure level
21/19/16
≤ 120 bar ≤ 30 μm
≤ 30 mg/l
22/20/17
≤ 90 bar ≤ 50 μm
≤ 60 mg/l
23/21/18
≤ 60 bar ≤ 80 μm
≤ 120 mg/l
24/22/19
≤ 30 bar ≤ 150 μm
≤ 250 mg/l
The data in the below table are reference values.
The actual airborne sound pressure level depends
especially on the installation conditions.
L [dB(A)] for pump at speed
pA
Pump
2900 [min
MTS 20 56
MTS 40 59
MTS 80 61
MTS 140 64
MTS 210 67
MTS 280 69
MTS 440 72
18
2 3
Steel, cast
Al (Si > 5 %)
iron, Al
Turning/ Turning/
milling milling
Tungsten Tungsten
carbide carbide
21/19/16 21/19/16
≤ 25 μm ≤ 20 μm
≤ 25 mg/l ≤ 20 mg/l
22/20/17 22/20/17
≤ 45 μm ≤ 40 μm
≤ 50 mg/l ≤ 40 mg/l
23/21/18 23/21/18
≤ 75 μm ≤ 60 μm
≤ 100 mg/l ≤ 80 mg/l
24/22/19 24/22/19
≤ 120 μm ≤ 100 μm
≤ 200 mg/l ≤ 160 mg/l
-1 -1
] 3500 [min ]
58
61
63
66
69
71
74
Abrasive class
4 5
Steel Steel, hard
Grinding Grinding
Corundum Corundum
20/18/15 20/18/15
≤ 17 μm ≤ 15 μm
≤ 15 mg/l ≤ 10 mg/l
21/19/16 21/19/16
≤ 30 μm ≤ 20 μm
≤ 30 mg/l ≤ 20 mg/l
22/20/17 22/20/17
≤ 50 μm ≤ 40 μm
≤ 60 mg/l ≤ 40 mg/l
23/21/18 23/21/18
≤ 80 μm ≤ 60 μm
≤ 120 mg/l ≤ 80 mg/l
6 7
Tungsten
Titanium
carbide
Grinding Grinding
CBN Diamond
19/17/14 18/16/13
≤ 10 μm ≤ 6 μm
≤ 5 mg/l ≤ 3 mg/l
20/18/15 19/17/14
≤ 15 μm ≤ 10 μm
≤ 10 mg/l ≤ 5 mg/l
21/19/16 20/18/15
≤ 20 μm ≤ 15 μm
≤ 20 mg/l ≤ 10 mg/l
22/20/17 21/19/16
≤ 40 μm ≤ 20 μm
≤ 40 mg/l ≤ 20 mg/l