This animation illustrates how a standard Polychem chain and flight scraper system is assembled and installed.
The Singer models 106-2SC-PCO and 206-2SC-PCO dual solenoid electronic valves are based on the Singer model 106-PG and 206-PG main valves. The flow into and out of the upper operating chamber is controlled by the two pilot solenoids. The electronic control determines whether the opening or closing solenoid is operated. The change in valve position depends upon which solenoid is operated and the duration of the energized period.