Diaphragm Metering Pump MEMDOS E / DX
BW 1 04 02 / 2
Lutz-Jesco GmbH
Improved changes are always reserved without notice.
3. Installation
For selection of a pump during construction of a
plant as well as for installation and operation, the
local rules must be observed. This applies to the
selection of suitable pump materials, the handling
of the chemicals and the electrical installation. At
the same time the technical data of the metering
pump according to the above tables must be
considered, and the plant must be designed
correspondingly (e.g. pressure loss in lines
depending on nominal diameter and length).
Both, the designer and the user are responsible to
make sure that the whole plant including the
metering pump is constructed so that neither plant
equipment nor buildings are severely damaged in
the case of chemical leakage due to the failure of
wear parts (e.g. diaphragm rupture) or burst tubing.
When constructing chemical plants, the installation
must be carried out so that no consequential
damages appear which are unreasonably high
even if the metering pump fails. We recommend
installing leakage probes and containment tanks.
Metering pumps are produced according to highest
quality standards and have a long service life.
Nevertheless some parts are subject to wear (e.g
diaphragm, valve seats, valve balls). To ensure
long operating life, visual checks are required
regularly. Operating and maintenance personnel
must be able to access the pump easily. Periodic
maintenance protects the metering pump against
shutdowns.
To increase the metering accuracy and reliability,
we recommend using additional fittings. These
include backpressure valves, relief valves, leakage
probes, chemical low level indicators and
particularly pulsation dampeners against pressure
fluctuations, as shown in the following installation
example.
Always use appropriate tools for the installation of
plastic connecting parts. In order to avoid damage,
never apply excessive force. Plastic parts
(especially PVC parts) can be screwed and
unscrewed more easily if the thread is lubricated
with vaseline or silicone grease before.
Installation example
Legend
1 Metering pump E/DX MB 1 04 02
2 Suction line MB 1 22 01
3 Electric agitator MB 1 36 01
4 Tank MB 1 20 01
5 Relief valve MB 1 25 01
6 Diaphragm shutoff valve MB 1 24 01
7 Injection nozzle MB 1 23 01
8 Pulsation dampener MB 1 27 01
9 Switchbox upon request
Note: For this purpose, the compatibility with the
chemical to be metered must be checked.
Ambient temperatures exceeding 40°C are not
permitted. Radiant heat of apparatus and heat
exchangers must be kept in limits allowing the
pump to sufficiently dissipate its own heat. Exposure
to direct sunlight must be avoided. If the pump is
installed outside, provide an enclosure to protect it
against weather.
Mount the pump so that the suction and discharge
valve are in vertical position. To ensure that the
pump stands firm, fasten it with screws on an
appropriate foundation.
The system piping must not exert any force on the
connections and valves of the metering pump. To
avoid incorrect metering after the process is finished,
provide an electric and hydraulic interlocking system.
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