ECOLAB DOS ECO Kurz- Betriebsanleitung Seite 77

General information
n Metering:
Metering is the task of the metering pump. When the pump sucks in the medium,
negative pressure is generated. As a result, the medium within the pump flows into the
compression space of the of the pump head. During the subsequent pressure change,
the pump meters the medium and dispenses the metering quantity via a valve into the
pressure line.
Important additional aspects: The oval gear meter OMG
flow meter SMx detects different flow rates. This enables automatic flow monitoring to
immediately detect irregularities that could negatively impact the process. If, for
example, the flow rate deviates from the defined metering volume, the main control
can trigger an automatic shutdown of the metering process.
Delivery:
n
Delivery begins at the metering station and ends at the customer's system for which
the metered medium is intended. A complete delivery system consists of the pressure
side maintenance valve on the metering station, a metering hose (metering line) and
the metering valve on the injection unit of the customer's system. The maintenance
valve discharges the metered medium into the metering hose. The metering hose sits
between the maintenance valve and the metering valve and directs the metered
medium from the metering station to the injection point.
Important additional aspects: The valves at the pump head regulate the flow of the
medium by opening and closing. In addition, the pressure-side metering valve
prevents the backflow of medium from the customer's process via the metering line
into the metering station.
1.7.2 Incompleteness of the machine
Ä Chapter 7 'Declaration of incorporation' on page 56.
Ecolab does not provide a control unit for the dosing station.
Therefore this dosing station is an incomplete machine.
As an external main controller for the dosing station, the operator of the plant must
provide a controller, e.g. in the form of a programmable logic controller (PLC).
The measures required for integration into a machine can be found in the appendix of the
main operating manual (417101649 Dosing station ECO,
417101656 Rev. 01-10.2019
PLUS
Ä Table on page 3).
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