4.1.11 Pneumatic Actuator Inputs
Up to eight pneumatic actuators can be connected to the ChlorGuard7 system.
Flexible 8mm air hoses are connected to the inlet and outlet ports.
4.1.12 Chlorine Transmitter/Sensors
The standard ChlorGuard7 system includes one Drager Polytron 7000 chlorine Transmitter and
sensor assembly.
The big graphic display shows status information with the help of pictograms and plain text and
guides the user through calibration and configuration. The built-in sensor data memory contains all
the relevant information. This allows for the use of pre-calibrated sensors so that the Dräger Polytron
7000 can be used as a virtually maintenance free transmitter.
4.1.13 Electric Actuator and Support Bracket Assembly
The electric actuator/support bracket and interconnecting key assembly is used to close the chlorine
container valves. The electric actuator is set for a specified torque of 30Nm which is sufficient to
tightly close the container valves.
To attach the actuator to the drum or cylinder just simply slip on the bracket and interlocking key over
the valve and attach it to the spindle on the valve. A slight alignment of the interlocking key to the
spindle can be done by simply turning the actuator manually with an Allan Key provided.
To fix the support bracket to the container valve a simple G Clamp is used. It is essential that the G
Clamp is tightened firmly to ensure all the torque from the actuator is transferred to the valve spindle
and not the support bracket. If the bracket is not firmly tightened the valve will still be closed to the
required torque but it may be difficult to remove the support bracket due to the torque being applied to
the bracket rather than the valve spindle.
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