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Particle Control

The degree of protection (isolation) from particulate contamination, including sub-micron dust, aerosol, bacteria and other germs.

General Dust-Free Enclosures provide no filtration. Nitrogen purged systems typically use filtered nitrogen, but these chambers provide no additional particle control or removal.


closed loop filtration

filtration


Closed Loop Open Loop
Turbulent-Flow Filtration circulates the process environment through 99.99% efficient HEPA filters (rated at 0.3µm particles) or 99.999% efficient ULPA filters (rated at 0.12µm particles). Closed loop systems continuously recirculate gas; open-loop systems provide single-pass filtration of incoming gas and final filtration before it is released outside the enclosure.

closed loop filtration Laminar-Flow Filtration provides a vertical laminar flow of HEPA-filtered air moving at a uniform rate [typically 90 – 100 ft (27 - 30 meters) /minute] through the chamber. Air exits through openings either on the floor or at the rear of the chamber.

 

 


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