Sliding Door systems operate on a track system, which is designed to provide years of smooth, trouble-free service. This track system, combined with permanently lubricated trolleys provides virtually silent operation and minimal resistance. The system requires the least head room of any industrial door system available. Pre-mounted components minimize field assembly time and reduce the possibility of installation errors. A microprocessor control system that constantly monitors the door operation and position, insuring maximum control and efficiency. Permanently lubricated components and self-diagnostic electronics virtually eliminate the maintenance that is required on most door systems available today.