Pass boxes
Inoxytech designs and produces active and passive cleanroom pass boxes and trolleys for hygienic and controlled material transfer. With our transfer hatches, you reduce staff movements and minimize the risk of contamination. Each pass box is manufactured in stainless steel and finished according to the applicable standards, with attention to detail, easy installation, and personalized service.
The importance of pass boxes in the pharmaceutical and medical sector
A pass box, also called a transfer hatch, transfer hatch, or pass through hatch, forms a controlled transition between spaces with different levels of purity. You move materials without entering the cleanroom each time and without disrupting the pressure differentials. Personnel movements are minimized, reducing the chance of contamination. The pressure hierarchy is maintained, and your process remains protected. In environments where precision and hygiene are key, a well-thought-out pass box is essential.
Active or passive pass box, which suits your application?
Passive pass box
There is no ventilation (supply/extract) or filtering provided in the passive or static pass box.
Active pass box
With an active or dynamic pass box, the supply air is filtered through a HEPA filter (H13 or H14), which is flat integrated into the passbox (and is easily replaceable). Extraction is also possible, for example, to create a negative pressure. Another option is to neutralize the overpressure through an adjustable door grille. Both the supply and extraction channels are not visibly integrated into the passbox. The positioning of the connections of the supply and extraction can be determined in the design phase.
In environments where every transfer poses a potential risk, a correctly designed pass box makes the difference between control and contamination.
A custom pass box for your cleanroom
Dimensions
Pass boxes and trolleys are produced in the dimensions required by your cleanroom. We adjust the height, width, and depth to fit the available wall opening.
Materials and finishing
Our pass boxes are manufactured in stainless steel 304 or 316, depending on the application. Stainless steel 304 is hygienic, easy to maintain, and highly formable and weldable, ideal for standard cleanroom environments. Stainless steel 316 provides additional resistance to corrosion and acidic or saline environments, perfect for stringent laboratories. All pass boxes receive a K320 finish, making the surface smooth, scratch-resistant, and easy to clean.
Design
Interlock
Our pass boxes are standardly equipped with an interlock, so that only one door can be opened at a time. This maintains the pressure hierarchy in the cleanroom and prevents cross-contamination. You can choose between a built-in interlock or an external pass box if the control is connected to a BMS system. A built-in interlock is still an option after installation. A pass box can also be provided without control, in which case the wiring for the electrical components is provided above the ceiling.
Embedded magnet
Each door has a mechanical magnet that ensures it always closes properly, even in case of power failure. This keeps the cleanroom safe and hygienic regardless of the circumstances.
Double or guillotine doors
We produce pass boxes with double doors or guillotine doors (vertically moving). Both systems minimize the risk of contamination and fit into any cleanroom configuration.
Door control/interlock
Doors can be easily controlled with a time delay, via PLC, or connected to your BMS system (external interlock control).
Adjustable shelf
Our pass boxes can be equipped with a fixed or adjustable shelf, perforated or not, providing maximum flexibility for different types of materials.
Base plate
The pass trolleys come with a flat base plate flush with the floor. Corners can be rounded, depending on the dimensions, for added hygiene and user convenience.
PVD sealing strip
The doors are equipped with a PVD sealing strip ensuring airtightness and resistance to aggressive cleaning agents such as H2O2. The strip can be easily removed for cleaning purposes.
Built-in components
All electrical and control components are flat-mounted, from the button to the electromagnet. This keeps the surface smooth, hygienic, and easily accessible for maintenance.
