Tecfluid FLOMID Series - Manual (Page 7)

METALLIC PIPES METALLIC PIPES
Without internal lining With internal lining
or PLASTIC PIPES
EARTH DISKS
The earth disks are necessary when the installation is with plastic pipes or metallic pipes with an
internal insulating lining (PTFE, PVDF, PP EBONITE etc.).
The earth disks are supplied in two versions:
METALLIC, in the form of a disk in stainless steel EN 1.4404 (AISI316L), for liquids compatible
with this material.
PLASTIC, that have an electrode to make the contact with the liquid. The materials (plastic and
metal) depend on the product to be metered.
The electrodes can be EN 1.4404, Hastelloy C, Titanium, Zirconium, etc..
The connection of the functional earth should be made as follows:
A)
In the case of metallic pipes without internal lining connect the earth cables to the
counterflanges.
B) In the case of metallic pipes with internal lining or plastic pipes, connect the earth cables to
the earth disks, supplied on demand.
7
MAINTENANCE
It is recommended to clean the electrodes in installations where incrustations or appreciable
sedimentations can occur.
Cleaning can be done using liquid detergents and medium hard brushes.