Ecolab EcoAdd Series Operating Instructions Manual page 251

Installation example 2
1
2
3
Installation example 3
1
2
3
4
A pressure-retention valve or metering valve is not a shut-off device which
is absolutely tight sealing.
In order to prevent the metering medium from escaping while the pump is
stopped, we also recommend installing a solenoid valve (pos. 3), which is
released with the pump.
Installation example 4
1
2
1 Injection valve / metering valve
2 Pressure control valve
3 Overflow valve
For offgassing media and products with a viscosity of > 100 mPas flooded
suction is recommended.
Here attention must be paid that the injection point (pos. 1), is positioned
over the discharge container and/or an appropriate pressure-retention valve
(pos. 2) is installed.
These measures prevent empty lifting of the discharge container.
1 Injection valve / metering valve
2 External release
3 Solenoid valve
4 Pressure control valve
When metering in pipes with a vacuum, a pressure control valve (Pos. 4) is
to be installed in the metering line.
1 Overflow valve
2 Injection valve / metering valve
The metering point should not be positioned below the supply container as
this creates a risk of the supply container being siphoned empty.
49
Mounting and installation
417102276 Rev. 5-02.2020