by-pass door

double sliding door

A pair of sliding doors which can pass each other, each in its own track.
References in periodicals archive ?
There are no extensive inspections or filter cleaning needed, no expensive by-pass door motors are required, and no differential pressure switches or filters elements to replace.
By-Pass Door Access (ONLY IF Containment Doors are Installed)
Unlike other systems, there is no need for regular maintenance and cleaning, and since the unit does not become blocked, there is no need for complicated by-pass doors.