We have a dedicated team who design our products to meet the highest standards for user safety.
The team of draughtsmen hold years of experience designing laboratory layouts. They are adept at balancing the customer’s requirements, equipment limitations and optimal layout. We use a well renowned architectural BIM (Building Information Management) programme to design the layouts and integrate our product line into the layout process.
A big part of mitigating risk to the operator is providing engineering controls to reduce the operator exposure to the risk. Extraction systems are designed to protect the user by removing any contaminants from the breathing zone of the operator. Extraction systems can take the shape of Fume Cabinets, Extraction Hoods, and Downflow Benches, with each application requiring unique extraction to ensure proper user protection.
Filtration Systems Design and Selection
SBT Laboratories have the expertise to design filtration systems to meet the requirements of many diverse applications. The filtration systems are designed to remove particles, biological pathogens, odours, acid vapours, smoke, and other gaseous contaminants.
When gaseous contaminants need to be removed a sophisticated activated charcoal and ceramic media is used to bind the gas molecules to the filter media. The media is selected based on numerous criteria including the types of gases to be removed and the duty cycle.
Contaminant Gases that can be removed from airstream.
|Sulphur Dioxide||Other oxides of Sulphur|
|Volatile Organic Compounds (VOCs)||Mercaptans|
This carbon-based media must be periodically replaced to ensure the proper removal of the contaminants.
When particulate matter needs to be removed from an airstream it is vital that both the nature of the pollutant is understood in terms of density, particle size, shape and contamination level. In addition, it is important to consider the application requirements of the filtered air.
To remove particles from the air several grades of filters can be used;
- coarse pre-filters are designed to remove larger particles to protect the fans and increase the lifespan of any finer filters which follow the pre-filter.
- The finer filters are selected by the required air quality in the laboratory.
- Germicidal lamps can also be added into the filtration system. These lamps eliminate biological contaminants and airborne pathogens.
Below is a table showing the various filter classes and their typical applications.
|Filter Type||Filter Class||Efficiency (%) at the MPPS||Common Uses|
|Retention (Total)||Retention (Local)|
|EPA Filters (Efficiency Particulate Air Filters) These filters do not require verification of local penetration||E10||> 85%||–||Removal of airborne pollutants in critical ventilation systems. Lowest grade filter that can be fitted to Ultra-Clean Operating Theatres|
|E11||> 95%||–||Domestic vacuum cleaners outlet filters|
|E12||> 99.5%||–||Air intakes to vehicle engines|
|HEPA Filters (High Efficiency Particulate Air Filters)||H13||> 99.95%||> 99.75%||Final filter for dust extract systems|
|H14||> 99.995%||> 99.975%||GMP cleanroom supply systems Any system that requires on site DOP testing with a maximum penetration of 0.01%|
|ULPA Filters (Ultra Low Penetration Air Filters)||U15||> 99.9995%||> 99.9975%||Final filter for GMP Grade A cleanroom zones|
|U16||> 99.99995%||> 99.99975%||Air supply systems in the Microelectronic cleanroom production facilities|
|U17||> 99.999995%||> 99.9999%|