1
2
3
4
P_DX_0021_SW
Fig. 5: Squeezing the hose
1 Normal shape of hose
2 Excessive squeezing (increased wear and tear on the pump and hose)
3 Perfect squeezing
4 Insufficient squeezing (medium backflowing in the cavity will destroy the hose within a short period of
time)
The spacer plates are factory-fitted. You can adapt the number of
spacer plates to the actual operating conditions in accordance with
the following table.
Tab. 3: DFDa 025 / Number of spacer plates:
rpm
0 ... 19
20 ... 39
40 ... 59
60 ... 79
80 ... 99
bar
0.5
1
1
1
0
0
2.5
1
1
1
1
1
5.0 *
2
2
2
2
2
7.5
4
3
3
3
3
10.0
5
4
4
4
4
12.5
6
5
5
5
4
15.0
7
6
6
6
-
* Delivered state
Transport, storage, assembly and Installation
30
