7. Installation
7.1 General information
Local rules and regulations must be taken into account when selecting a dosing pump for designing a
system, and for installation and operation. This applies to the selection of the appropriate materials for the
dosing pump, the handling of chemicals, and electrical installation.
Before installing the pump in areas with a potentially explosive atmosphere, the dosing pump must be
checked to ensure that it meets the minimum requirements set by the applicable explosion protection
regulations. For this purpose, the data on the dosing pump rating plate must be compared with the local
requirements.
The technical specifications of the dosing pump (section 5) must also be taken into consideration, and the
system designed accordingly (e.g. pressure loss for pipe dimensions i.e. nominal diameter and length).
ATTENTION!
For the MEMDOS E/DX 75 and 76, pipe dimension must be at least DN 10. The DN 6 pipe dimension is
permissible only for short lines (up to 2 m) and low-viscosity media (<50 mPa s) .
The designer and operating company are responsible for ensuring that the whole system, including the
dosing pump, is constructed so that neither system parts nor buildings are damaged in the case of chemical
leakage due to the failure of wear parts (e.g. diaphragm rupture) or burst hoses. If the chemical system
represents a potential source of danger, the installation must be designed so that no unreasonable conse-
quential damage occurs, even if the dosing pump fails. We therefore recommend installing leakage monitors
and collecting pans.
The drain pipe of the dosing head must be visible so that a diaphragm rupture can be detected. Drainage
should be able to flow freely downward through the drain pipe.
To increase dosing accuracy and ensure functional reliability, we recommend installing additional valves
and accessories. These include back-pressure valves, pressure-relief valves, leakage monitors and low level
indicators, as shown in the installation examples.
Always use appropriate tools when installing plastic connecting parts. To avoid damage, never apply exces-
sive force.
IMPORTANT!
Plastic parts (especially PVC parts) can be tightened and loosened more easily by applying lubricant to the
thread beforehand (e.g. silicone grease).
Threaded stainless steel parts (e.g. dosing head and valves) must be lubricated before being assembled
(e.g. with PTFE spray), in order to prevent seizing.
ATTENTION!
Check the lubricant for compatibility with the chemical.
7.1.1 Installation of MEMDOS E with ATE servomotor
When delivered, the ATE servomotor is already connected to the dosing pump and adjusted. When installing,
sufficient installation space of at least 150 mm must be provided in order to allow later maintenance.
The electrical connection of the ATE servomotor must be made according to local regulations and may
only be carried out by qualified technical personnel. The wiring diagrams (section 7.5) show the two basic
connection variants.
Cable type and cross-section must be chosen according to the motor data.
The cable passage through the housing must be made professionally. We recommend using gland con-
nections with strain-relief clamp. The required protection class must be ensured by professional-standard
installation of the electrical connections.
Installation | Operation & Maintenance Instructions |
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Summary of Contents for MEMDOS E
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