English (GB)
8
* l/h per dosing head; double the capacity for double pumps.
3.4.1 Accuracy
• Dosing flow fluctuation: smaller than ± 1.5 % within the control
range 10-100 %
• Linearity deviation: ± 2 % of the full-scale value.
Applies to:
• water as dosing medium
• fully deaerated dosing head
• standard pump version.
3.4.2 Inlet pressure and counter-pressure/suction lift
Maximum inlet pressure
Minimum counter-pressure at the discharge valve of the
pump
DMH 254
DMH 50-10
DMH 50-10/50-10
50
10
26
60
10
31
101
10
52
DMH 102-10
DMH 102-10/102-10
102
10
54
122
10
65
203
10
108
DMH 143-10
DMH 143-10/143-10
143
10
75
172
10
90
286
10
150
DMH 175-10
DMH 175-10/175-10
175
10
92
210
10
110
-
-
-
DMH 213-10
DMH 213-10/213-10
213
10
112
255
10
134
-
-
-
DMH 291-10
DMH 291-10/291-10
291
10
153
-
-
-
-
-
-
DMH 46-16
DMH 46-16/46-16
46
16
26
55
16
31
92
16
52
DMH 97-16
DMH 97-16/97-16
97
16
54
116
16
65
193
16
108
DMH 136-16
DMH 136-16/136-16
136
16
75
163
16
90
271
16
150
DMH 166-16
DMH 166-16/166-16
166
16
92
200
16
110
-
-
-
DMH 202-16
DMH 202-16/202-16
202
16
112
242
16
134
-
-
-
DMH 276-16
DMH 276-16/276-16
276
16
153
-
-
-
-
-
-
DMH 255
DMH 194-10
DMH 194-10/194-10
194
10
54
233
10
65
387
10
108
DMH 270-10
DMH 270-10/270-10
270
10
75
324
10
90
540
10
150
DMH 332-10
DMH 332-10/332-10
332
10
92
398
10
110
-
-
-
DMH 403-10
DMH 403-10/403-10
403
10
112
484
10
134
-
-
-
DMH 550-10
DMH 550-10/550-10
550
10
153
-
-
-
-
-
-
DMH 257
DMH 220-10
DMH 220-10/220-10
220
10
28
264
10
34
440
10
56
DMH 440-10
DMH 440-10/440-10
440
10
56
528
10
67
880
10
112
DMH 575-10
DMH 575-10/575-10
575
10
73
690
10
88
1150
10
146
DMH 750-4
DMH 750-4/750-4
750
4
73
900
4
88
1500
4
146
DMH 770-10
DMH 770-10/770-10
770
10
98
924
10
118
-
-
-
DMH 880-10
DMH 880-10/880-10
880
10
112
1056
10
134
-
-
-
DMH 1150-10
DMH 1150-10/1150-10
1150
10
146
-
-
-
-
-
-
DMH 1500-4
DMH 1500-4/1500-4
1500
4
146
-
-
-
-
-
-
Pump type
50 Hz
60 Hz
100 Hz
Single pump
Double pump
Q*
p max.
Max.
stroke
rate
Q*
p max.
Max.
stroke
rate
Q*
p max.
Max.
stroke
rate
[l/h]
[bar]
[n/min]
[l/h]
[bar]
[n/min]
[l/h]
[bar]
[n/min]
Note
The pump can be operated in the range between 10
% and 100 % of the maximum dosing capacity.
Pump type
[bar]
DMH 251
8
DMH 252
8
DMH 253
5
DMH 254
5
DMH 255
0.8
DMH 257
0.8
Pump type
[bar]
DMH 251
2
DMH 252
2
DMH 253
2
DMH 254
2
DMH 255
2
DMH 257
2
Note
A positive pressure difference of at least 2 bar is
required between the suction valve and the
discharge valve in order for the dosing pump to
operate correctly.
If the total counter-pressure (at the dosing point) and
geodetic height difference between the suction valve
and the dosing point is less than 2 bar (20 m WC), a
pressure-loading valve must be installed immediately
before the dosing point.
