Double layer pass box

Product Overview

The Double Layer Pass Box is designed for transferring materials between cleanroom areas and other controlled environments. It provides a convenient transfer point, helping reduce unnecessary personnel movement and direct access between adjacent areas.

Featuring a vertical cabinet design, this unit integrates two independent transfer chambers in one structure. The upper and lower chambers provide separate spaces for material handling, making it a practical solution for cleanroom facilities with limited installation space.

Structural Design

The equipment consists of an upper transfer chamber and a lower transfer chamber, arranged vertically within one cabinet. Each chamber has its own access doors and independent transfer space.

The double-shell structure provides a robust cabinet design. Rounded internal corners help reduce areas where dust may accumulate, making the internal surfaces easier to clean during routine maintenance.

The separate chamber arrangement allows materials to be transferred through different access spaces according to the workflow and layout of the cleanroom facility.

Air Filtration System

The pass box incorporates a fan-driven air circulation and filtration system. Air passes through a HEPA filtration unit before entering the transfer chamber, helping reduce airborne particles and maintain a clean internal environment.

A differential pressure gauge allows operators to monitor filter resistance during equipment operation. The filtration unit can be accessed for inspection and filter replacement when required.

Control System & Operating Functions

The control system manages the main operating functions of the pass box, including fan operation, door interlocking and the available UV sterilization function.

The electronic interlock system prevents the two access doors of the same transfer chamber from being opened simultaneously. This helps maintain controlled material transfer procedures between adjacent cleanroom areas.

The equipment also features lighting and operation-time settings for convenient daily use. The UV lamp function can be used as part of the material transfer procedure where configured.

Working Principle

Materials are placed inside the selected transfer chamber through the access door on one side. After loading, the door is closed before the opposite-side access door is opened for retrieval.

The electronic interlock system controls the opening sequence of the corresponding doors, helping prevent both sides from being opened at the same time during normal operation.

The air circulation and UV sterilization functions can be operated according to the equipment configuration and the facility's operating procedures.

Technical Specifications

The main dimensions of the Double Layer Pass Box are listed below.

Note: Dimensions are based on the product engineering drawing. Final dimensions should be confirmed against the approved project drawing.

Product Drawing & Dimensions

The engineering drawing illustrates the overall cabinet structure, chamber arrangement and main dimensions of the Double Layer Pass Box. It provides a useful reference for equipment selection, cleanroom layout planning and installation space evaluation.

Applications

Double Layer Pass Boxes are suitable for facilities where materials need to be transferred between different cleanroom areas while maintaining controlled access. The two-chamber design supports organized material handling in various production and laboratory environments.

• Pharmaceutical manufacturing facilities
• Cleanroom production workshops
• Laboratories and testing facilities
• Medical device manufacturing areas
• Other controlled-environment facilities

Maintenance & Service

Regular inspection and maintenance help keep the pass box in proper operating condition. Routine checks can include the fan and motor, control panel, door interlock system, differential pressure gauge and UV lamp.

The filter should be inspected and replaced when necessary. Maintenance work should be carried out by trained personnel after disconnecting the power supply and following the equipment safety procedures.

Export Packaging & Delivery

Each unit is prepared and packed according to its structure and transportation requirements before shipment. Proper export packaging helps protect the equipment during handling, loading and international transportation.

The following photos show actual export packaging of our cleanroom equipment.

Customized Manufacturing

As a cleanroom equipment manufacturer, we provide customized pass box solutions for different project requirements. Our team can review customer drawings, cleanroom layouts and technical specifications to discuss suitable equipment structures and configurations.

Dimensions, chamber layouts, structural details and other configurations can be tailored according to project needs. From drawing review and production coordination to factory inspection and export packaging, we support customers throughout the equipment supply process.