The 3426 is a Sequencer Card. Dual 0-30 second timer module for 7902 or 7982 Series Control Box. It can be added to a standard 7902 or 7982 Control Box to convert to sequential operation.
Heavy duty, surface mounted control box contains one or two electrically controlled pneumatic circuits.
Air filtration, pneumatic regulation, and system timing is performed by the control box. 7980 series control boxes also contain a built-in air pump to power the system.