Description
Contaminants produced during media preparation are swept down and away from the operator as laminar air-flow bathes the internal work zone with clean air which has been filtered through Grade H14 HEPA filters. This process ensures that the stringent requirements of Class 5 (ISO) – necessary for the protection of products and operators during filling, transfer and packaging – are met.
Air at the work zone floor level is then mixed with ambient air from outside the booth which has been drawn in from under the protective solid wall or flexible PVC curtain, through a bank of prefilters located at the base of the rear work zone wall. The air is then recirculated with 30% being exhausted to ambient at ceiling height via a second HEPA filter. This procedure ensures that negative pressure within the working space is maintained, thus guaranteeing that there will be no breach of the containment boundary.
AES Environmental stand-alone “Maxi-Safe” Laminar Flow Booths are the optimal solution for a wide range of processing applications such as:
Aseptic dispensing
Assembly of electronics and optical components
Cell culturing
Media pouring
Preparation of medical devices
Sterility testing
These are applications where products, processes and at times the environment are highly sensitive to contamination.
Construction
AES Environmental Maxi-Safe down flow booths are constructed in powder coated mild steel, 304 or 316 stainless steel or a combination of both. With a variety of standard dimensions (height, width and safe working depths) our booths can also be custom engineered to any size.
Fans
Variable speed direct drive centrifugal fan/blowers enable separate airflow adjustment throughout the filter life and allow adjustment of the supply air velocity.
Filters
AES Environmental HEPA Filters are tested to 99.999% Efficiency by Hot DOP to AS 4260 to ensure full protection. All filters are tested in strict accordance with the requirements of Standards Australia and the performance of the pre-filters and final filters are continuously monitored by Magnehelic differential pressure gauges.
Climate Control
In dealing with applications involving powder materials, optimum temperatures and relative humidity need to be maintained. It must be borne in mind that both a filling machine motor and the unit’s fans will generate a considerable amount of heat. As an option cooling can be achieved by the fitting of an air-conditioning system.
Control Panel
A modern, proven control panel provides one touch access to all functions including servicing. A fully integrated self diagnostic processor with digital status display up by an audible and visual alarm guarantees your safety.
Quality Assurance
Every booth is factory tested and certified by a NATA registered laboratory to establish compliance with performance requirements of AS1386, Part 5.
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Servicing
Your investment in health and safety represented by laminar flow clean benches, laminar flow booths, bio-safety cabinets and work areas is one that needs regular monitoring to ensure an environment free from biological or other hazardous particulate contamination.
Regular maintenance will ensure protection for your workers and the sterility of products which may require manipulation in these special areas.
AES Environmental provides a comprehensive testing and certification services for all clear air applications.
The essential service is your assurance that the stated performance criteria of your laminar flow cabinet, booth and facility is maintained. We also certify that the work area has a cleanliness level that is equal to or better than Class 3.5, that is, less than 3.5 particles per litre of 0.5 micrometres and greater in size. Our laboratory is National Association of Testing Authorities (NATA) registered to perform field-testing of all High Efficiency Particulate Air (HEPA) are filter installations, (HEPA Filters demand an efficiency greater that 99.97 percent to a 0.3 micrometre test aerosol).
NATA is an independent organization which registers laboratories in many fields of testing.
To meet NATA requirements, a laboratory must have appropriately qualified testing and administrative personnel as well as equipment, capable of measuring performance with a very high degree of accuracy and consistency.
All equipment is registered and regularly calibrated to the appropriate standard and the registered laboratory is periodically re-assessed to ensure maintenance of standards.
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Specialist Services
Mechanical inspection — includes the motor / blower unit, vibration mountings, switch functions, gaskets, pre-filters and HEPA filters.
Check for system integrity — challenge for filter leakage to AS 1807.6 and AS 1807.7
Ensure the work area is not violated by room air — test for induced air leakage in the work zone.
Prevent cross contamination in the work area — check and adjust air velocity and uniformity of airflows.
Establish HEPA filter life and performance — measure static pressure of filters and electronic motor current.
Check environment factors — measure light output, sound level and germicidal ultraviolet lamp efficiency.
Repair and adjust to specification — when necessary and when ever possible, on-site repairs are included in our service.
Certify that the performance meets Australian Standard specifications — a certificate of compliance, which is issued under the terms of AES Environmental Accreditation by NATA, is available following the completion of each service program.
Additionally, a full report is issued which shows the result of each test and the accuracy of the result. The certification process guarantees that the installation will comply with following standards:
AS 1386: Cleanrooms and Work Stations
AS 1807: Testing Methods
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