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Clean Room Pass Through: Enhancing Contamination Control and Workflow Efficiency

In controlled environments like clean rooms, which require high levels of cleanliness and contamination control, the transfer of materials between different areas can be a challenging task Clean room pass through systems provide a solution by creating a secure pathway for transferring materials while maintaining the integrity of the controlled environment. These systems typically consist of two chambers separated by interlocking doors or air curtains, allowing materials to be passed through without direct access to the clean room.

Clean Room Pass Through: Enhancing Contamination Control and Workflow Efficiency

Types of clean room pass through systems

Clean room pass through systems come in various types, each offering specific features and advantages. The selection of the appropriate system depends on factors such as the application, cleanliness requirements, and transfer method. Here are three common types of clean room pass through systems:

Mechanical interlock pass through

Mechanical interlock pass through systems utilize interlocking doors that ensure only one door is open at a time. This prevents the simultaneous opening of both doors, maintaining the integrity of the clean room's controlled environment. Mechanical interlocks are reliable, cost-effective, and suitable for applications where air showers or stringent cleanliness requirements are not necessary.

Air shower pass through

Air shower pass through systems incorporate air showers within the pass through chambers. These showers blow high-velocity filtered air onto materials and personnel entering or exiting the clean room. The air showers help remove particulates and contaminants from the surfaces, minimizing the risk of cross-contamination. Air shower pass through systems are ideal for environments with strict cleanliness requirements.

Hybrid pass through

Hybrid pass through systems combine the features of mechanical interlock and air shower pass through systems. These systems offer the benefits of both types, providing enhanced contamination control through interlocking doors and additional cleanliness assurance through air showers. Hybrid pass through systems are commonly used in industries where stringent cleanliness and contamination control are paramount.

Considerations for selecting a clean room pass through system

When selecting a clean room pass through system, several factors must be considered to ensure it meets the specific requirements of the facility. These considerations include:

Size and dimensions

The size and dimensions of the pass through system should align with the available space and the materials being transferred. It is essential to consider the size of the largest items to be passed through to avoid any limitations or obstructions during material transfer.

Material compatibility

The materials used in the construction of the pass through system should be compatible with the substances being transferred. Chemical resistance, non-shedding properties, and durability are crucial factors to consider to prevent contamination or damage to the materials.

Airflow requirements

For air shower pass through systems, the airflow velocity, direction, and filtration efficiency should be evaluated to meet the desired cleanliness standards. Proper airflow control helps remove particulates and contaminants from the surfaces of materials and personnel entering or exiting the clean room.

Transfer method (manual or automated)

The choice between manual and automated transfer methods depends on the nature of the materials, the desired level of operator involvement, and the workflow requirements. Manual transfer methods are suitable for small-scale operations, while automated systems are more efficient for high-volume material transfer.

Installation and maintenance of clean room pass through systems

Proper installation and regular maintenance are essential to ensure the optimal performance and longevity of clean room pass through systems. Adhering to specific guidelines and procedures is crucial for maintaining the cleanliness and integrity of the controlled environment. Here are some key considerations:

Proper installation guidelines

During installation, it is important to follow the manufacturer's guidelines to ensure the pass through system is correctly integrated into the clean room environment. Proper sealing, alignment, and connection to the HVAC system, if applicable, are critical to maintaining the desired cleanliness levels.

Regular cleaning and disinfection procedures

Routine cleaning and disinfection of the pass through system are necessary to prevent the buildup of contaminants. Using appropriate cleaning agents and following established cleaning protocols help maintain the cleanliness and sterility of the system.

Routine maintenance and inspections

Regular maintenance and inspections are vital to identify and address any issues that may affect the performance of the pass through system. This includes checking the interlock mechanisms air shower functionality, seals, filters, and electrical components. Timely maintenance ensures the system operates efficiently and remains compliant with cleanliness standards.

Benefits of using clean room pass through systems

The utilization of clean room pass through systems offers several benefits, contributing to improved contamination control, safety, and workflow efficiency. Some of the key benefits include:

Improved contamination control

Clean room pass through systems provide a controlled and sealed transfer mechanism, significantly reducing the risk of contamination. The interlocking doors, air showers, and proper sealing prevent the entry of particles, microorganisms, and other contaminants into the clean room, ensuring the integrity of the environment.

Enhanced safety for personnel and products

By minimizing the need for personnel to enter and exit the clean room, clean room pass through systems enhance safety. Reduced human interaction lowers the risk of introducing contaminants or compromising the controlled environment. Additionally, the proper transfer of materials ensures the safety and integrity of products, especially in industries where contamination can have severe consequences.

Streamlined material transfer process

Clean room pass through systems streamline the material transfer process, minimizing the time and effort required for manual handling. The designated entry and exit points, coupled with efficient transfer methods, contribute to a smooth workflow and optimized productivity. This allows clean room personnel to focus on their core tasks while ensuring the efficient movement of materials.

Common industries and applications for clean room pass through systems

Clean room pass through systems find applications in various industries that require strict contamination control and material transfer protocols. Some of the common industries and their associated applications include:

Pharmaceutical and biotechnology

Clean room pass through systems are extensively used in pharmaceutical and biotechnology facilities for the transfer of raw materials, equipment, and finished products. They ensure the integrity and purity of pharmaceutical products, prevent cross-contamination, and support aseptic manufacturing processes.

Electronics manufacturing

In the electronics manufacturing industry, where even minute particles can lead to product failures, clean room pass through systems play a vital role. These systems enable the transfer of sensitive electronic components, preventing contamination and maintaining the required cleanliness levels during the assembly and testing processes.

Healthcare and hospitals

Clean room pass through systems are utilized in hospitals and healthcare facilities to maintain sterile conditions during the transfer of medications, surgical instruments, and other sensitive medical supplies. These systems contribute to infection control and prevent the introduction of contaminants into critical areas, such as operating rooms and sterile storage areas.


Clean room pass through systems play a critical role in maintaining cleanliness, minimizing contamination risks, and enhancing workflow efficiency in controlled environments. With various types available, careful consideration of factors such as size, material compatibility, airflow requirements, and transfer method is necessary to select the most suitable system. Proper installation, maintenance, and compliance with regulatory standards are crucial for optimal performance. The benefits of clean room pass through systems include improved contamination control, enhanced safety, and streamlined material transfer processes. While challenges and limitations exist, ongoing advancements in technology, such as automation, IoT integration, and advanced filtration, promise future improvements in clean room pass through systems.

Kwang Purification is proud to offer examples of a variety of our cleanroom Pass Box below.  Medical Pass BoxHospital Pass BoxPass-Through CostsElectrical Interlock Pass BoxPass Box PriceLaminar Flow Pass BoxStainless Steel Transfer Through.

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