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6. Installation
6.1 General information on installation
Warning
Observe the specifications for the installation location and
range of applications described in section Technical data.
Warning
Faults, incorrect operation or faults on the pump or system
can, for example, lead to excessive or insufficient dosing,
or the permissible pressure may be exceeded. Conse-
quential faults or damage must be evaluated by the opera-
tor and appropriate precautions must be taken to avoid
them!
Warning
Risk of hot surfaces!
Pumps with AC motors may become hot.
Allow a minimum space of 100 mm to the fan cover!
Note
A positive pressure difference of at least 2 bar is required
between the suction valve and the discharge valve in or-
der for the dosing pump to operate correctly.
If the total counter-pressure (at the dosing point) and geo-
detic 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.
Related information
3.2 Pump models and pump types
6.2 Installation location
6.2.1 Space required for operation and maintenance
Note
The pump must be installed in a position where it is easily
accessible during operation and maintenance work.
Maintenance work on the dosing head and the valves must be
carried out regularly.
•
Provide sufficient space for removing the dosing head and the
valves.
6.2.2 Permissible ambient influences
See section Ambient and operating conditions.
Note
The installation site must be under cover!
Do not install outdoors!
Related information
3.8 Ambient and operating conditions
6.2.3 Mounting surface
The pump must be mounted on a flat surface.
6.3 Mounting
•
Mount the pump on a console or pump foundation using four
screws.
Note
The flow must run in the opposite direction to gravity!
6.4 Approximate values when using pulsation dampers
Caution
Risk of damage to the system!
It is always recommended to use pulsation dampers for
large high-speed pumps!
In particular for pump types with a flow rate above 1000
l/h (DMH 257), suction and discharge pulsation dampers
should be used directly at the pump suction and discharge
ports of the pump. The size of the suction and discharge
lines should be adjusted accordingly.
Since the pulsation is influenced by many factors, a sys-
tem-specific calculation is essential. Request a calculation
from our calculation program.
The table below indicates the approximate values and the suction
line length for which suction pulsation dampers are required. The
values apply to 50 Hz operation when water or similar liquids are
dosed.
Pump model / pump
type
Nominal width of
suction line
Maximum length of
suction line [m]
DMH 251
DMH 2,2-25
DN 8
8
DMH 2,3-16
DN 8
8
DMH 2,4-10
DN 8
8
DMH 4,5-25
DN 8
8
DMH 4,9-16
DN 8
8
DMH 5-10
DN 8
8
DMH 11-25
DN 8
3
DMH 12-16
DN 8
3
DMH 13-10
DN 8
3
DMH 17-25
DN 8
1,5
DMH 18-16
DN 8
1,5
DMH 19-10
DN 8
1,5
DMH 21-25
DN 8
1
DMH 23-16
DN 8
1
DMH 24-10
DN 8
1
DMH 252
DMH 10-16
DN 8
8
DMH 11-10
DN 8
8
DMH 23-16
DN 8
2
DMH 24-10
DN 8
2
DMH 36-16
DN 8
1
DMH 37-10
DN 8
1
DMH 45-16
DN 8
1
DMH 46-10
DN 8
1
DMH 54-16
DN 8
1
DMH 253
DMH 21-10
DN 20
8
DMH 43-10
DN 20
8
DMH 67-10
DN 20
6
DMH 83-10
DN 20
4
DMH 100-10
DN 20
3
DMH 254
DMH 50-10
DN 20
8
DMH 97-16
DN 20
8
DMH 102-10
DN 20
8
DMH 136-16
DN 20
5
DMH 143-10
DN 20
5
DMH 166-16
DN 20
3
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English (GB)
Содержание DMH 25X
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