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14.12.2015
Pharmaceutical production: PSL targets Singapore
PSL (Powder Systems Ltd), Liverpool, UK, specialising in manufacture of filtration, drying and high containment isolators for the pharmaceutical industry, has in recent months delivered several advanced process installations in Singapore. The first project comprised a pilot scale pressure agitated nutsche filter dryer (ANFD) and a discharging isolator achieving a DOEL (design occupational exposure limit) of less than 1 microgram per cubic metre. This discharging isolator allows a full recovery of the dried product from a 0.125m² filtration area vessel, sampling without process disruption, powder dispensing and packing off within a safe and contained environment for the protection of both the operator and the product.
As part of a new batch extension hall at the same manufacturer, PSL also installed a 0.6m² filter dryer and discharging isolator with the same features as the aforementioned pilot plant ANFD. This installation was also unique and instead of a mobile lowering mechanism, this large scale facility was fixed but supplied with a platform.
Thirdly the company installed a 1m2 scalping filter which is used to recover and treat the filtrate of a slurry coming from another vessel. The filtrate is dissolved with purified water and waste liquid can then be recovered for a more manageable waste treatment. The filter plate is a single piece with no screws or bolts for optimum cleanability and its design allows for interchangeability between filtration media materials. PSL plans to open a new office in Singapore for a faster response time to local user requirements. www.powdersystems.com
PSL 0.6m2 filter dryer and discharging isolator, showing (below) discharging isolator upper chamber with view into the filter dryer vessel and agitator
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