Ejector Non-Return Valve
In chlorine gas metering systems with full vacuum,
The vacuum is built up by injectors.
It is produced by the stream of water in these aspirator
pumps. If the water stream is disturbed or interrupted,
the water pressure is also present at the intake port.
For this reason, it is essential that the injectors
be equipped with non-return valves at the intake port
in order to prevent water entering the chlorine gas
metering units, leading to corrosion and failure of
the connected equipment.