Tunnel is capable of rates up to 750 vpm, depending on the vial size and weight. The tunnel can be made to function as a stand-alone unit or in conjunction with a vial washing system. A Kaye data logging unit records hard copy data derived from analog transmitters and thermocouples located throughout the tunnel. Operationally, vials entering the tunnel are transported through the Preheat Zone where they are exposed to a flow of partially heated air. The preheat zone also prevents hot air from escaping to upstream equipment.
Heat transfer is accomplished by hot air that is generated by a blower inside the Hot Zone.
Both sides of the cooling zone are sealed off with gates. The entrance gate prevents larger amounts of air from entering the Hot Zone. The exit gate prevents excessive sterile air from flowing into the tunnel. Patented Overpressure Bypass System allows relief of overpressure from fill room ensuring no interference with Hot Zone air flow. The cooling zone over-pressure damper is controlled by a differential pressure switch that measures the pressure differential between the cooling zone and the fill room.