A closed process boundary.
Review the full opening: curtain, side guides, bottom edge and adjoining wall. The specified pressure boundary depends on how these details work together.
Cleanroom pressure
differential.
Room pressure.
A clearly defined boundary.
A cleanroom pressure differential relies on room air balance and the closed boundary. Match the door perimeter and opening cycle to the specified pressure conditions.
THE DOOR’S ROLE
Cleanroom pressure differential.
The door’s role.
Select a stage to review the door boundary during passage. Pressure limits, airflow direction and recovery conditions follow the room specification.
ILLUSTRATIVE PRESSURE BOUNDARY01 / 04
Room sideExample higher pressure
Adjacent areaExample lower pressure
Closed boundaryDOOR CLOSED
Concept diagram. Actual airflow direction, pressure limits and recovery criteria follow the room specification.
PRESSURE BOUNDARIES IN PRACTICE
The complete opening.
The details that matter.
Review the closed door as part of the room boundary. These installation photographs show two arrangements to consider during specification.
The door-to-wall interface.
Include the frame-to-wall junction and the closed perimeter in the installation review. Photographs illustrate the arrangement; leakage performance needs relevant evidence.
CONFIRM THE PRESSURE CONDITIONS
Confirm the
pressure boundary.
Define the room requirement before comparing doors. These four points connect the pressure target with the door and the acceptance review.
Pressure direction and target
Share the cleanroom differential pressure requirements, the intended airflow direction and the conditions under which the room will be checked.
Clean room door seals
Review the proposed perimeter, threshold and wall junction details. Request leakage evidence with its pressure condition, test method and tested door configuration.
Opening pattern
Describe the busiest traffic period and expected time open. Agree the closing conditions with passage protection and the actual movement through the opening.
Monitoring and acceptance
Agree how the room differential is measured after passage, what triggers a review and the checks required before accepting the installed arrangement.
DISCUSS YOUR PRESSURE REQUIREMENT
Plan your door boundary.
Share the opening dimensions and specified room differential. We’ll review the door arrangement and the evidence needed for your project.
