A spring-loaded injection or metering valve (pos. 1) should be installed at the injection
point (including with supplying metered amounts into depressurised systems).
Installation example 2
1 Injector valve (Metering valve)
2 Pressure control valve
3 Overflow valve
For outgasing media and products with a viscosity of ‘> 100 mPas’ , flooded
suction is recommended.
In using this method, however
, ensure that the injection point is positioned
over the discharge container and/or an appropriate pressure control valve
(pos. 2) is installed. These measures prevent the discharge container from
being siphoned empty.
A pressure control valve or a metering valve is not an absolutely hermetically
sealing shutoff device.
Installation example 3
1 Injector valve (Metering valve)
2 External release
3 Solenoid valve
4 Pressure control valve
For metering in pipelines with underpressure, a pressure control valve must
be built into the metering pipe.
T
o prevent the running out of the metering medium when the pump is
stopped, we also recommend the fitting of a solenoid valve which is
approved for use with the pump.
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.
Assembly, mounting and installation
30417102233 Rev. 3-03.2019
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