Advanced Application Ductless Fume Cabinets / Fume Hoods

Filtration Technology System

Multiplex™ Filtration consists of a pre-filter and main to create a combination of chemical and physical architecture customised to each application. The mechanical design enhances safety, convenience and overall value.

• The electrostatic prefilter is accessible from within the cabinet.
• A patented filter clamping mechanism allows for the filter to be easily installed and ensures an even seal at the filter peripheral face at all times to prevent bypass leakage.
• The filter chamber prevents contaminated air from contacting internal cabinet mechanisms.
• The main filter number and installation date are displayed in a front-access window.

This carbon filtration technique is based on enhanced, activated carbon particle formulations from specially selected, naturally occurring raw material superior to wood or other organic sources. The carbon is treated to attain the proper porosity and aggregate surface area and to react with several ranges of aerosolised chemicals moved through the filter by an air-handling blower.

• The multiplex option permits one or more filtration options to be combined to meet a wider range of multiple-use applications. Multiplexing permits configuration for the capture of acids, bases and particulates such as biological aerosols when paired with HEPA or ULPA filters.
• The carbon filter is a self-contained assembly sized to fit the specified product model number, and configured to optimise airflow across 100% of the filter surface area for maximum efficiency, prolonged filter life, optimal diffusion and saturation capacity, and user safety.

Bio-Cabinets the Australian supplier for all Air Science pre-filters and carbon filters used in Purair Advanced Application Ductless Fume Cabinet / Fume Hoods.

Multiplex™ Filtration System, Summary

	Pre - Filter	Main Filter	Safety Filter
Electrostatic	Protects the main filters from aerosols, mists, dust and particulates with filter efficiency superior to 95.5% down to 0.5 microns.
	Standard	--	--
Activated Carbon	FILTCO™ Sourced. A single carbon filter containing activated carbon granules chemically formulated to capture one or more specific vapours or family of vapours.
Single: One type of activated carbon.	--	Specify	Specify
Blended: A single filter with two or more types of carbon blended throughout.	--	Specify	Specify
Layered: A single filter with two or more types of carbon in separate layers.	--	Specify	--
Stacked: Two or more single filters each with a different type of carbon.	--	Specify	--
Activated Carbon	Protects the main filters from aerosols, mists, dust and particulates with filter efficiency superior to 95.5% down to 0.5 microns.
	--	Specify	Specify

Avoid Revolving Filters

Air Science strongly discourages the unsafe practice of revolving secondary back-up filters into the primary filter compartment. All Air Science units are designed to avoid this false sense of security.

In a revolving filter system, users are instructed to rotate the secondary back-up filter into the primary filter position after non-permissible exposure levels of chemicals are detected within the monitoring chamber.

Depending on when the unit can be properly shut down, the secondary filter can be loaded to the point of saturation itself, thereby creating a safety hazard if the filter is considered new.

If a new spare filter is not immediately available, a user may inadvertently (or knowingly) re-install a contaminated primary filter into the secondary location permitting the system to operate without protection.

Additionally, the secondary filter can become contaminated as it ages, sometimes for years, on top of an operational cabinet; losing filter efficiency by the time it is installed.

Either practice puts both personnel and the environment at risk, even though some manufacturers provide stickers to label the filters as “used”.

The Air Science non-revolving filter practice ensures that only a new filter is fitted into the primary filter compartment, and permits the secondary filter to remain installed for at least twice the change-out period, resulting in a 50% savings in filter change-out costs.

Filter Summary

Formula	Description
GP Plus!	The most widely used filter in the range, primarily for solvent, organic, and alcohol removal.
ACI Plus!	Neutralizes volatile inorganic acid vapours.
ACR	Iodine and methyl iodide vapours. It is frequently used for iodination reactions with low-level radioactive iodine.
ACM	Mercury vapour.
AMM	Removes vapours from dilute ammonia solutions and to remove low molecular weight amines.
SUL	Designed to remove hydrogen sulphide and low molecular weight mercaptans.
CYN	Removal of hydrogen cyanide. Many cyanide compounds will evolve HCN gas if acidified, so this filter is normally specified if working with any cyanide compound.
FOR	Designed to oxidize formaldehyde and glutaraldehyde fumes. It is widely used in hospital pathology laboratories.
ETH	Diethyl ether is adsorbed on activated carbon, but because of its low boiling point, local heat adsorption can reduce the capacity of the filter. Special impregnation allows a chemical reaction, which increases the filter capacity.
EDU	Designed to handle chemicals normally used is a university level chemistry curriculum.
MIL	As the name implies, this filter is designed for military applications involving war gasses.
HEPA/ UPLA	Powders and particulates.
EFT	Universal filtration.

PURAIR Advanced Ductless Fume Cabinets / Fume Hoods - Bio-Cabinets Australia