DESCRIPTION
Copper tube is used to direct the flow of the actuating fluid to the pneumatically-actuated devices. In EFS/PFS, these devices include the selector valve actuator, needle cylinders (discharge valve actuators), and pressure switches. The copper tube that will be used for connecting the pilot cylinder, selector valve actuator, and the first agent cylinder’s discharge valve actuator is shipped from the factory in rolls of prescribed length and must be cut accordingly during field installation. Optionally, the copper tube can be factory pre-cut and bent to shape into one or more of the following: agent interconnect actuation tube, interlock tube (nitrogen actuation tube), selector valve actuation tube and pressure switch actuation tube. The brass compression and flare fittings provide for the connection of copper tube between the source and pneumatic actuators or pressure switch.
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