Sterilizing tunnel 
DHT series
The sterilizing tunnels of the DHT series dry, sterilize and depyrogenize glass containers using a low-turbulence vertical air flow. The sterilizing-grade filters or integrated high-efficiency particulate air filters (HEPA filters) do not require any sealing on the air discharge side. Special hot gas filters in the sterilization zone produce a cleanroom class A atmosphere in all operating conditions (even during the pre-heating and cooling phases). The tunnels have multiple insulation layers to prevent heat loss and maximize energy efficiency.
HIGHLIGHTS
- Low-turbulence, vertical air flow for optimal heat transfer
- Precise maintenance of production parameters
- Gentle container heating
- High energy efficiency
| Type of machine | Output | Processing range |
|---|---|---|
| DHT2431 |
|
|
| DHT2550 |
|
|
| DHT3670 |
|
|
| DHT40125 |
|
|
| DHT49125 |
|
|
B+S hot gas filter with long filter life
Easy and centralized operation
Pharmaceutical design
- Transverse conveyor belt with transfer mechanism for stable containers at the tunnel infeed
- Heating timer for pre-heating prior to operation
- Cleanroom partition
- Special Bausch+Ströbel hot air filters in the pre-heating and cooling zones
- Vane wheel anemometers for air velocity measurement in the pre-heating, sterilizing and cooling zones, with display on the operating panel or recording on a multichannel process recorder
- Equipment to monitor the differential pressure between the cleanroom and the cooling zone
- Equipment to monitor the max. dwell time of the containers in the high-temperature environment, with discharge of processed containers to the machine downstream (DHT 4432/DHT 5732/DHT 5764)
- Heat exchanger (for cooling the circulating air in the cooling zone)
- Hot-sterilizable cooling zone equipped with identical Bausch+Ströbel hot gas filter to sterilizing zone
- Recording of conveyor belt speed on a multichannel process recorder
- A range of checking and alarm devices and counters
- Software upgrades
- Qualification (IQ/OQ)
Energy efficiency
Energy saving is also a top priority at B+S.- The sterilization process offers the greatest potential for reducing line energy consumption.
- Multilayer insulation is used to minimize heat loss in the tunnel tube.
- The pressure cascade is optimized to minimize the heat loss resulting from cross-flow between zones.
- Air is recirculated within the sterilization zone, eliminating the need for an external air supply and maximizing energy efficiency.
- Thanks to these and various other measures, B+S consistently achieves exceptional energy efficiency, setting the benchmark in the market.
