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BENCH TYPE FUME CUPBOARDS
Bench-top operations form the majority of chemical work undertaken
within fume cupboards and thus the majority of fume cupboards
are of this type. The enclosure is usually constructed so that
work can be enclosed by pulling down a vertically sliding sash
on the front of the cupboard.
Where there is a need for a fume cupboard to enclose a tall apparatus
(eg. A chromatography column), the enclosing cupboard may be adapted
to suit the use, having a sliding sash covering the front portion
of the cupboard.
 bench
type fume cupboard designed for high temperature work eg.
mining, mineral assaying. |
DOWNRAUGHT FUME CUPBOARD
A downdraught fume cupboard allows air to be exhausted
across or through the base of the fume cupboard. This type of
fume cupboard is used in applications where heavier than air fumes
are generated.
VARIABLE EXHAUST AIR VOLUME FUME CUPBOARD
A variable exhaust air volume fume cupboard maintains
an approximately constant face velocity irrespective of sash position.
A reduced volume of room air is exhausted through the fume cupboard
as the sash is moved to reduce the opening size. The modulation
of exhaust air volume out of the laboratory minimizes the waste
of conditioned air.
BY-PASS FUME CUPBOARD
A fume cupboard that allows a variable portion of the room air
to flow into the working chamber, other than through the working
aperture (sash opening), with the objective of preventing excessively
high face velocities at low sash openings and allowing a constant
total exhaust airflow irrespective of sash position.
 double
sided fume cupboard |
DOUBLE SIDED FUME CUPBOARD
A fume cupboard having two movable sashes on opposite
side's double-sided fume cupboards are used in schools between
preparation rooms and classrooms.
SCHOOL FUME CUPBOARDS
A fume cupboard designed for school applications and
for demonstration purposes. This type of fume cupboard is designed
for demonstration experiments within school laboratories with
transparent sides and backs, so students can gather around and
view experiments in safety.
WALK-IN FUME CUPBOARDS
Walk-in fume cupboards are designed for large-scale work
that cannot successfully be executed in bench-type fume cupboards.
These larger types usually have the sash in two or more pieces
or doors. Any portion of the working area may be reached simply
be sliding the sashes or opening the doors. When the work involves
larger apparatus, one of the sashes may be removed temporarily.
Sections of the sash can also be used as a safety shield.
 typical
bench type fume cupboard fitted on a fully enclosed support
frame. |
Johndec Fume Cupboards for Special Applications Includes:
- Radioactive Materials
- Perchloric Acid
- Hydrofluoric Acid
- Flammable Reagents
- High Temperature Work
- Flammable Liquids Distillation
- Glutaraldehyde Fume Cupboards
- Endoscopy Fume Cupboards
- Heavy Vapour Work
- Purpose Made Depth, Width Fume Cupboards
Please contact our sales office for further information on all
the above.
|
bench mounted fume
cupboard fitted with a duct mounted fume scrubber |
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