Safety Shutoff
Valve
MB 2 04 06 / 1
General description
Full-vacuum chlorinators are designed according
to the highest safety standard DIN19606. Even in
the case of a line rupture chlorine gas cannot
escape, only ambient air is sucked into the vacuum
system. If the vacuum regulator function is faulty a
safety blow-off valve is opened thus providing for
a pressure relief in the vacuum system. This
happens even at low-value overpressure and the
chlorine gas is lead directly to the gas detector.
However, should the unhappy case occur that both
the vacuum line and the inlet valve are defective,
the safety blow-off valve cannot react. As a result of
the defective vacuum line no overpressure can be
built up. Thus uncontrolled escape of chlorine gas
occurs at another point.
By using the safety shutoff valve this case is
avoided so that the highest possible safety of the
full-vacuum chlorinators is guaranteed.
At the same time the safety shutoff valve prevents
water from entering into the vacuum regulator even
if the ejector non-return valve is untight.
Function
During operation of a chlorinator acoording to
DIN19606 the ejector builds up a vacuum. As a
result of this vacuum, the safety shutoff valve is
opened via the diaphragm surface first and only
then the vacuum regulator is opened. During
operation the shutoff valve is virtually a mere
connecting pipe for the metering plant.
If the ejector is switched off, the vacuum collapses
and the shutoff valve closes due to spring loading.
The valve completely shuts down the metering line
so that even at a high overpressure at the valve inlet
chlorine gas cannot reach the end of the line. By
mounting the safety shutoff vlave within the area of
the chlorine gas line being monitored by the gas
warning device the plant is absolutely safe even in
the case of malfunction (see also installation dia-
gram on the back).
Lutz-Jesco GmbH
Improved changes are always reserved without notice.
Summary of Contents for 43-20406
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