M21 With Damping System; Potential Problems With The Metering Tube; Jammed Float - Tecfluid M21 Series Instruction Manual

Take care to keep the special tool in its correct position during assembly, manually or held in
a vice to make assembly easier.
If you are interested in acquiring the special tool from TECFLUID S.A. please indicate for
which nominal diameter it is required.
Models M21/HR, M21/HN, M21/HRA, M21/HNA
To dismount the float, the plug (8) should be unscrewed and the PTFE seal (7) removed.
By turning the instrument upside down the float will slide out. Be careful that the float does
not fall and gets damaged itself.
With the float removed, it can be cleaned and the inside of the flowmeter can also be
cleaned.
17.2

M21 with damping system

For these models it is recommended to send the flowmeter to Tecfluid S.A. facilities, in order
to perform its maintenance.
17.3

Potential problems with the metering tube

17.3.1 Jammed float
To remove the float, follow the steps in section 17.1.
To remove adhered chemical dirt to the float, the metering tube or the calibrated orifice,
clean the parts with suitable products or solvents and soft brushes, never use metallic tools.
The float may also become clogged by accumulation of metallic particles around it due to the
float magnetic field. In this case install a magnetic filter on the inlet of the meter, or just a
normal filter depending on the size and nature of the particles.
Follow the steps in section 17.1 to reassemble the flowmeter.
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