The actuation (pilot) cylinder is used to provide for the storage of liquid CO2. When the actuation (pilot) cylinder is operated, the CO2 is released and directed to the actuator of selector valve (if installed) and needle cylinder through 6-mm copper tubing connected to the elbow assembly at the valve outlet. The pressure of the CO2 is used to operate the selector valve actuator and a series of up to 25 actuation (pilot) cylinder actuators in a multi-zone system within 1 second. The actuation (pilot) cylinder is fitted with a discharge valve that uses a burst disc to hold the CO2 pressure on one side of a plunger inside the valve – keeping the valve closed. The valve is opened by puncturing the burst disc using the solenoid cutter and subsequently venting the pressure acting on the plunger, enabling the flow of CO2. The discharge valve is also fitted with burst-disc type safety plug as part of the safety feature of the actuation (pilot) cylinder.
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