Ecolab EcoPro, Руководство по эксплуатации

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6.3.2 Installation examples
Hydraulic installation
With media that tend towards sedimentation, the base suction valve or the foot
valve of the suction line or suction lance must be mounted above the expected
sludge layer.
Term definition Siphoning
Siphoning refers to the maximum fluid level (in this case the supply container)
being higher than the lowest point in the metering line. In this process, the fluid
runs out of the metering line without any pump output and solely via what is
known as the "hydrostatic pressure equalisation".
Installation example 1
The metering pump should ideally be positioned on or over the metering
container (pos. A).
A positive pressure difference of at least 0.1 MPa (1 bar) must exist
between the back-pressure at the injection point and the pressure at the
metering pump (pos. B). If this is not the case, a pressure control valve
(pos. 2) must be included in the metering line.
In addition, to avoid excessively high pressure levels in the metering line, an
appropriate excess safety valve (pos. 3) must be installed.
This valve’s overflow line should be fed back into the container in a
depressurised state.
A spring-loaded injection, or metering valve (pos. 1) should be installed at
the injection point (pos. C) (including with supplying metered amounts into
depressurised systems).
For easy venting of the metering pump, the vent connection should be
routed via a separate line back to the metering medium container (D).
CAUTION!
Neither the overflow line nor the vent line is permitted to be fed back into the
suction line of the metering pump!
Installation example 2
1 Injection valve / metering valve
2 Pressure control valve
3 Overflow valve
For outgasing media or for products with a viscosity > 100 mPas,
installation in feed mode is recommended.
In this process, ensure that the injection point (pos. 1), is positioned above
the supply container and/or an appropriate pressure control valve (pos. 2) is
installed. These measures avoid the supply container being siphoned.
Assembly, installation, modification and upgrades
35 417102264 Rev. 5-01.2019