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5.3 Weight
Pump model
Dosing head material
Weight [kg]
Single
pump
Double
pump
DMH 251
PVC, PP, PVDF
11
13
Stainless steel 1.4571
Alloy C-4, 2.4610
13
17
DMH 252
PVC, PP, PVDF
11
13
Stainless steel 1.4571
Alloy C-4, 2.4610
13
17
DMH 253
PVC, PP, PVDF
12
17
Stainless steel 1.4571
Alloy C-4, 2.4610
14
21
DMH 254
PVC, PP, PVDF
27
32
Stainless steel 1.4571
Alloy C-4, 2.4610
32
42
DMH 255
PVC, PP, PVDF
55
63
Stainless steel 1.4571
Alloy C-4, 2.4610
65
83
DMH 257
PVC, PP, PVDF
56
88
Stainless steel 1.4571
Alloy C-4, 2.4610
68
112
5.4 Stroke volume
Pump model
Stroke volume [cm
3
]
4 bar
10 bar
16 bar
25 bar
DMH 251
-
3,5
3,1
2,9
DMH 252
-
6,4
6,3
-
DMH 253
-
11,3
-
-
DMH 254
-
31,6
30
-
DMH 255
-
60
-
-
DMH 257
171
131
-
-
5.5 Materials
Pump housing material
•
Pump housing: Al 226.
AR control unit enclosure
•
Upper part of enclosure: PPO blend
•
Lower part of enclosure: aluminium.
Warning
Observe the chemical manufacturer's safety instructions
when handling chemicals!
Make sure that the pump is suitable for the actual dosing
medium!
Caution
The resistance of the parts that come into contact with the
media depends on the media, media temperature and op-
erating pressure. Ensure that parts in contact with the me-
dia are chemically resistant to the dosing medium under
operating conditions!
Note
Further information on resistance with regard to the me-
dia, media temperature and operating pressure is availa-
ble on request.
5.6 Data of contact pressure gauge for diaphragm
leakage detection (optional)
Note
Following data is not valid for contact pressure gauges in
explosion-proof version.
The contact pressure gauge has a reed switch with electrically
isolated contact output, maximum switching power 10 W for DC
current or 10 VA for AC current. The maximum switching voltage is
75 V for DC current or 50 V for AC current, maximum switching
current 0.5 A.
The switching function is set up as an NC contact, i.e. if the
diaphragm breaks, the current circuit is interrupted.
The pressure gauge has a 2-metre cable.
22
English (GB)
Summary of Contents for DMH 25X
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