Performance Improvement for a Walk-In and Bench Exhaust Hood
Exhaust hoods are incapable of product containment below ~1.0mg/cu.m. A walk-in hood space was modified with a flexible containment enclosure, i.e. a virtual room. The enclosure includes two sequential airlocks (left of picture) for introducing and removing supplies. A doghouse (center rear) for storing clean and dirty items. A sorbent pad covered the floor to minimize breakage and absorb any released solvents-----
Equipment was installed for the process using a fully zippered front opening. Once installed, the zipper was closed and the over-skirt taped down. The zippered door has six glovesleeves installed for access----
Transfer Through The Enclosure
A rigid pass-through existed between the walk-in and bench hoods. The flexible enclosure was installed as two separate components which met and were sealed together at the rigid pass-through----
Materials Transfer Benchtop
The contained pass-through allowed for product transfer both ways. Material is received from the processing step and transferred to dryer trays which are then placed in the vacuum dryer (accessible within the enclosure). After drying the product trays are unloaded at the benchtop, product yield weighed, and final packaged before returning through the rigid pass-through for final transfer out through the double airlock.
Vacuum Dryer access
The vacuum dryer is mounted within the enclosure and fully accessible for loading and unloading within the containment.