APPLICATIONS
CHEMFREE 2000 fume cupboards are used for the containment and removal of toxic vapours and aerosol, providing operator safety in a wide range of disciplines.
Applications for CHEMFREE 2000 fume cupboards may be found in many laboratories, including those in clinical diagnostic testing, biological and medical research, analytical chemistry, Q. C., biotechnology, pharmaceutical industries, food, fine chemical, petrochemical, cosmetic, photographic laboratories and the electronics industries.
FILTRATION
A wide range of filters is available, from activated charcoal adsorbing filters to chemical adsorbing filters for specific applications such as the use of formalin, gluteraldehyde or radioactive iodine labelled compounds and for others applications.
The filters (for "M" series)have a built in microchip device for their manage control.
The CHEMFREE 2000 60 unit incorporates a carbon filter which weighs approximately 13/21,5 Kg., the CHEMFREE 2000 90 unit incorporates two carbon filters with a total weight of approximately 18/28,8 Kg. and the CHEMFREE 2000 120 unit incorporates two carbon filters with a total weight of about 26/43 Kg.
Each fume cupboard is equipped with disposable type prefilters, with an efficiency of 75%/85%dust weight arrestance (ASHRAE) to protect the main activated charcoal filter.
DESIGN FEATURES
Each CHEMFREE 2000 cupboard contains an IP54 centrifugal motorfan, capable of maintaining a constant airflow by compensating for the clogging of the prefilters, which occurs during normal operation.
The CHEMFREE 2000 "S" series is equipped with a manual device for adjusting the air velocity to obtain the appropriate air velocity for each specific contaminant used.
The CHEMFREE 2000 "M" series is equipped with a microprocessor based monitoring system.
Each unit has a liquid crystal display to show the face speed and a digital setting system to select the most suitable velocity for each specific contaminant used.
TECHNICAL SPECIFICATIONS
CHEMFREE 2000 "S"
High level of protection from toxic vapours
High level of filtration efficiency
Large adsorption capacity
Filter monitoring systems
Ductless
Low cost
CHEMFREE 2000 "S" is designed to meet all the routine safety requirements encountered by both the operator and the environment through the use of chemicals reagents.
Units are equipped with a manual device to set the inlet air velocity when heavy or volatile chemicals are used and are supplied with fluorescent lighting.
Gas/vacuum taps, power points and gas detectors for monitoring filter efficiency are supplied as options.
CHEMFREE 2000 "M"
Microprocessor controlled monitoring system
Highly effective protection from toxic vapours
High filtration efficiency
Large adsorption capacity
Filter monitoring systems
Ductless
CHEMFREE 2000 "M" is designed with a microprocessor controlled system for a range of data which includes type and code number of the filter being used, installation date, maximum time allowance for filter use and a warning date for its replacement. Built in with five different languages like Italian, English, German, French and Spanish. Audible and visual alarms are also available to protect the operator.
These alarms cover out of range minimum and maximum air velocity, filter saturation, prefilter clogging, anemometer failure, gas detector failure and motorfan malfunctioning.
CHEMFREE 2000 "M" is equipped with fluorescent lighting as well as optional gas/vacuum tap and power point.
BUILT IN SAFETY
All electronic components, switches, lighting and motorfan have been selected and installed fully isolated from air contaminated with solvents and therefore meet the most stringent safety requirements such as EN 61010/1. Current directives of the European Community are also covered as certified by the CE mark.
ACTIVATED CHARCOAL FILTERS
The filters used in the fume cupboards are manufactured from high grade coconut Shell charcoal.
All types of activated charcoal used in these filters are of amorphous structure obtained from the heat controlled oxidation of coconutshells.
The cellulose structure of the coconuts provides the highest adsorption efficiency through a large surface area of up to 1050 m2/g.
FILTER TYPES
a) PRE-FILTERS
High performance pre-filters are designed to remove particulates from the air stream.
The filter material is based on electrets, which are permanently charged dielectrics.
They remove particulates from polluted air by strong electrostatic forces generated by the fibres from which they are made.
The combination of strong electric charges and open structure provides a filter with high efficiency, low airflow resistance and high loading capacity.
Pre-filter efficiency is equal to 75/85%dust weight arrestance (ASHRAE).
b) MAIN FILTERS
Eight types of filter media are available.
Most of these are impregnated activated carbon, to provide a higher filter capacity for lower molecolar weight organic compounds and inorganic gases and vapours.
A number of filter efficiency studies have been carried out, and all results using single bed filters show efficiencies very close to 100%.
1. A/C FILTER
The A/C filter is the most widely used filter in the range, and is used primarily for solvent fume removal. It is manufactured from coconut-Shell based activated carbon of 4 x 8 USS mesh size and surface area up to 1050 m2/gm.
Filtration is achieved by the physical adsorption of molecules in the pores of the activated carbon by Van der Waals forces.
Primary use: organic odours, hydrocarbons, aromatic solvents, animal odours, excrements, urines, acid odours, cadaverine, putrescine
Secondary use: oxygenated nitrogen compounds
2. ACR FILTER
This filter is impregnated with halide salts and is used for the high efficiency removal of iodine and methyl iodine. It is frequently used for iodination reactions with low-level radioactive iodine and efficiencies in excess of 99,99% have been measured.
Primary use: radioactive iodine
Secondary use: hydrocarbons
3. FORM FILTER
This filter is impregnated with an oxiding agent to oxidise formaldehyde to formate salts. It is widely used in hospital pathology and eytology laboratories.
Primary use: formaldehyde
Secondary use: organic emissions, hydrocarbons, aromatic solvents, acid gases
4. SULF FILTER
Primary use: acid odours, putrescine, cadaverine, acid gases, hydrogen sulphide, methyl mercaptan, sulphur compounds, sulphur dioxide, R. H.>85%
5. UR FILTER
Primary use: acid odours, putrescine, cadaverine, acid gases, hydrogen sulphide, methyl mercaptan, sulphur compounds, sulphur dioxide, nitrogen oxygenated compounds
Secondary use: organic emissions, hydrocarbons, aromatic solvents, hydrocyanic acid, R. H. < 85%.
6. CYAN FILTER
Primary use: hydrocyanic acid
Secondary use: organic emissions, hydrocarbons, aromatic solvents
7. MER FILTER
Primary use: mercury vapours
use: organic emissions, hydrocarbons
8. AM FILTER
Primary use: ammonia and its derivatives
Secondary use: organic emissions, hydrocarbons, aromatic solvents, alkaline odours, excrement, urines animal odours
CHEMFREE 2000 60-M
werkruimte 533 x 655 x 603 ( b x h x d )
buitenafmetingen 595 x 1118 x 750 ( b x h x d )
CHEMFREE 2000 90-M
werkruimte 823 x 655 x 603 ( b x h x d )
buitenafmetingen 885 x 1118 x 750 ( b x h x d )
CHEMFREE 2000 120-M
werkruimte 1123 x 655 x 603 ( b x h x d )
buitenafmetingen 1185 x 1118 x 750 ( b x h x d )
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