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Verfügbare Sprachen
Verfügbare Sprachen
Pump type
Single pump
Double pump
DMH 287
DMH 9-200
DMH 9-200/9-200
DMH 18-200
DMH 18-200/18-200
DMH 23-200
DMH 23-200/23-200
DMH 31-200
DMH 31-200/31-200
DMH 36-200
DMH 36-200/36-200
DMH 50-200
DMH 50-200/50-200
DMH 288
DMH 3-200
DMH 3-200/3-200
DMH 7.5-200
DMH 7.5-200/7.5-200
DMH 10-200
DMH 10-200/10-200
DMH 13-200
DMH 13-200/13-200
DMH 15-200
DMH 15-200/15-200
DMH 21-200
DMH 21-200/21-200
* l/h per dosing head; double the capacity for double pumps.
The pump can be operated in the range between 10
Note
% and 100 % of the maximum dosing capacity.
3.4.1 Accuracy
•
Dosing flow fluctuation: smaller than ± 1 % within the control
range 10-100 %
•
Linearity deviation: ± 1 % 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
Pump type
DMH 280
DMH 281
DMH 283
DMH 285
DMH 286
DMH 287
DMH 288
Minimum counter-pressure at the discharge valve of the pump
Pump type
DMH 280
DMH 281
DMH 283
DMH 285
DMH 286
DMH 287
DMH 288
10
50 Hz
Q*
p max.
[l/h]
[bar]
9
200
18
200
23
200
31
200
36
200
50
200
3.6
200
7.5
200
10.4
200
12.8
200
15.5
200
21
200
Note
Maximum counter-pressure*
Pump type
DMH 280
DMH 281
[bar]
DMH 283
1
DMH 285
10
DMH 286
5
DMH 287
5
DMH 288
5
* Observe the maximum permissible temperatures.
5
Maximum suction lift* (continuous operation) for media with
5
a viscosity similar to water
Pump type
[bar]
2
DMH 280
2
DMH 281
2
DMH 283
2
DMH 285
2
DMH 286
2
DMH 170-50
2
DMH 222-50
DMH 85-50
DMH 111-50
DMH 287
DMH 288
* Applies to a filled dosing head.
Max. stroke
Q*
p max.
rate
[n/min]
[l/h]
[bar]
28
11
56
22
73
28
98
37
112
43
146
-
26
4.3
54
9.0
75
12.5
92
15.4
112
18.6
153
-
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.
Maximum suction lift
Flooded suction
Flooded suction
Flooded suction
60 Hz
Max. stroke
rate
[n/min]
200
34
200
63
200
88
200
118
200
134
-
-
200
31
200
65
200
90
200
110
200
134
-
-
p max.
[bar]
200
100
100
100
50
200
200
[m WC]
1
1
1
1
1
1
1
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