Dynamic pass box:
A dynamic pass box, also known as an active transfer hatch or a cleanroom pass-through, is a specialized equipment used in cleanroom environments to facilitate the transfer of materials between different areas while maintaining the cleanliness and integrity of the cleanroom. Unlike static pass boxes, dynamic pass boxes incorporate additional features and mechanisms to enhance the control of airflow, minimize cross-contamination, and provide a higher level of cleanliness assurance.
Here are some key features and functions of a dynamic pass box:
- Airflow Control: Dynamic pass boxes have advanced airflow control mechanisms to maintain the desired cleanliness levels during material transfer. They typically utilize high-efficiency particulate air (HEPA) or ultra-low particulate air (ULPA) filters to remove particles and contaminants from the air passing through the pass box. The airflow can be unidirectional or recirculating, depending on the specific requirements of the cleanroom.
- Pressure Differential Control: Dynamic pass boxes are equipped with pressure sensors and control systems to maintain the desired pressure differentials between the cleanroom and the surrounding areas. This helps prevent the migration of contaminants and ensures that air flows from the cleanroom side to the non-cleanroom side during material transfer.
- Interlocking Mechanism: To maintain the integrity of the cleanroom, dynamic pass boxes incorporate interlocking mechanisms for the doors. These mechanisms ensure that only one door can be open at a time, creating an airlock that minimizes the risk of cross-contamination and maintains the desired pressure differentials.
- Air Shower System: Some dynamic pass boxes may feature an air shower system, which provides a high-velocity, filtered airflow to remove particles from the surfaces of items being transferred. The air shower helps reduce the introduction of contaminants into the cleanroom during material transfer.
- Material Handling Accessories: Dynamic pass boxes can be equipped with material handling accessories to facilitate the transfer of materials. These may include sliding shelves, roller conveyors, or robotic arms, depending on the specific requirements and nature of the materials being transferred.
- Monitoring and Control Systems: Dynamic pass boxes often incorporate monitoring and control systems to ensure proper operation and alert users of any potential issues. These systems may include visual indicators, alarms, and touch panel interfaces for controlling the airflow, pressure differentials, and interlocking mechanisms.
- Size and Configuration: Dynamic pass boxes are available in various sizes and configurations to accommodate different transfer needs and cleanroom layouts. They can be customized to fit specific requirements, such as size constraints or material handling specifications.
Dynamic pass boxes play a critical role in maintaining the cleanliness and control of cleanroom environments during material transfer. They help minimize the risk of cross-contamination, ensure the controlled transfer of materials, and contribute to the overall integrity of the cleanroom.
Regular maintenance, filter replacements, and adherence to cleanroom protocols are essential for the effective operation of dynamic pass boxes. It is important to follow proper cleaning and disinfection procedures to prevent the buildup of particles or contaminants and ensure the longevity and performance of the pass box.