Cruma Filters for Filtration of Gases, Solids and Aerosols in their Ductless Fume Hoods

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Cruma Filters for Filtration of Gases, Solids and Aerosols in their Ductless Fume Hoods

Cruma Filters for Filtration of Gases, Solids and Aerosols in their Ductless Fume Hoods
 
Cruma filters types
All the activated carbon filters of Cruma fume hoods have been impregnated, manufactured and tested according to the requirements of the CEN-141 standard.
 
Type A: adsorption of vapours and organic solvents (ketones, ethers, alcohols, cyclics,...). Activated carbon without impregnation.
Type BE: Inorganic gases like Cl2, HCl, HNO3,... and volatile sulphur compounds (H2S, H2SO4, SO2, SO3,...). Activated carbon with impregnations of metallic compounds and neutralising salts.
Type K: specific for NH3 vapours and amines. Activated carbon impregnated with metallic complexes.
Type F: specific for formaldehyde and derivatives. Impregnated with Cu.
Type ABEX: mixed type among filter A, BE and K. It is able to retain molecules belonging to all 3 groups. It is impregnated with inorganic neutralising salts, metallic salts, complexes and Cu.
 
Specific types: there are special filters available for Hg (type MD) and radioactive iodine (type GD).
 
The designation D indicates that a HEPA absolute filter class H14 (UNE-EN-1822 standard) is fitted as a pre-filter before the activated carbon filter and is required for applications that generate particles and / or aerosols.
 
Fume hood type
G
GS
 
Filter type
Filter type
Organics
A
AD
Inorganic acids
BE
BED
Formaldehyde
F
FD
NH3 and amines
K
KD
Hg (Mercury)
-
MD
Organics / inorganics / NH3 / amines
ABEK
ABEKD
 
G-type hoods are those with a single activated carbon filter (impregnated or not) for filtering fumes.
GS-type hoods are equipped with a double HEPA carbon filter for filtering fumes and particles (solids and aerosols).
 
All Cruma fume hoods are fitted with a Class G4 synthetic biofibre pre-filter (UNE-EN-779 standard) for the retention of atmospheric dust.
 
 
 
Ordering information:
Filters type G: Gas filtration for ECO2G, 870G, 990G, 1010G and 1020G fume hoods
A001
Type A: ideal for organic vapours like ketones, ethers, alcohols, xylenes, etc.
B001
Type BE: ideasl for inorganic acids like H2SO4, HCl, HNO3, H2S, SO3, etc.
F001
Type F: ideal for formaldehyde and derivatives as well as organic compounds
K001
Type K: ideal for NH3 and amines and good for organic compounds
MX001
Type ABEX: mixed type to be used when the proportion of organic, inorganic and NH3 / amines are similar
Filters type GS: Gas + fume filtration for ECO2GS, 870GS, 990GS, 1010GS and 1020GS fume hoods
AD001
Type AD: ideal for organic fumes and vapours like ketones, ethers, alcohols, xylenes, etc.
BD001
Type BED: ideasl for inorganic fumes and vapours of acids like H2SO4, HCl, HNO3, H2S, SO3, etc.
FD001
Type FD: ideal for fumes and vapours of formaldehyde and derivatives as well as organic compounds
KD001
Type KD: ideal for fumes and vapours of NH3 and amines and good for organic compounds
MXD001
Type ABEXD: mixed type to be used when the proportion of organic, inorganic and NH3 / amines are similar and generate fumes and vapours
MD001
Type MD: ideal for Hg (Mercury)
Filters type G: Gas filtration for 670G fume hood
A002
Type A: ideal for organic vapours like ketones, ethers, alcohols, xylenes, etc.
B002
Type BE: ideasl for inorganic acids like H2SO4, HCl, HNO3, H2S, SO3, etc.
F002
Type F: ideal for formaldehyde and derivatives as well as organic compounds
K002
Type K: ideal for NH3 and amines and good for organic compounds
MX002
Type ABEX: mixed type to be used when the proportion of organic, inorganic and NH3 / amines are similar
Filters type GS: Gas + fume filtration for 670GS fume hood
AD002
Type AD: ideal for organic fumes and vapours like ketones, ethers, alcohols, xylenes, etc.
BD002
Type BED: ideasl for inorganic fumes and vapours of acids like H2SO4, HCl, HNO3, H2S, SO3, etc.
FD002
Type FD: ideal for fumes and vapours of formaldehyde and derivatives as well as organic compounds
KD002
Type KD: ideal for fumes and vapours of NH3 and amines and good for organic compounds
MXD002
Type ABEXD: mixed type to be used when the proportion of organic, inorganic and NH3 / amines are similar and generate fumes and vapours
MD001
Type MD: ideal for Hg (Mercury)
 
 
HEPA Filtration for Laminar Flow Cabinets
HEPA filters are the most important component in the Cruma laminar flow cabinets (CLFC), which have a wide range of applications in fields such as microelectronics, scientific and health research, etc. They are also known as ‘absolute filters’ and were developed during World War II to remove radioactive particles from the air in the nuclear industry. Since then they have undergone continual advances to satisfy the ever increasing demand for smaller particles.
A conventional HEPA filter consists of a special continuous v-shaped fibreglass sheet with corrugated aluminium separators between the pleats. This piece is the actual filtering component, which is fitted into a rigid frame using a special polyurethane composite. The more advanced ‘minipleat’ filters are the ones included in the Cruma LFC assembly. A very tight pleat in the filtering element characterises them. Several techniques may be used to reduce the space between the pleats. Thermoplastic spacers are also used as pleat separators.
The technique of arranging them in pleats gives the filters their filtration efficiency. The HEPA filters used by Cruma are Class H-14, according to the EN-1822 standard, providing a minimum efficiency of 99.995% for 0.3 micron particles, according to test DOP. The highest HEPA category is H-14. High quality filters such as those inserted in Cruma cabinets are tested for their efficiency on submicron particles, as well as to determine the pressure drop (airflow resistance) they cause.
 
Contact Progen Scientific for the correct filter for your application.

 
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