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NON-HAZARDOUS FUME CUPBOARDS
- A range of superior fume cupboards with proven performance.
- Johndec fume cupboards provide maximum containment and safety
in the laboratory.
- Smooth aerodynamic performance.
- One piece moulded chamber eliminates joints and provided for
easy wash down and decontamination.
- Especially suitable for radioactive and perchloric acid use.
- Available with the Johndec perchloric acid Fume Scrubber and
recycle tank system.
- Complete system design, manufacture, installation and testing
service can be arranged.
- Wholly Manufactured in Australia to comply with AS2243.8.
 DESIGN
Johndec Safetyflow non-hazardous aerodynamic fume cupboards meet
exacting standards and recommendations for safety and containment
in the laboratory. The Safetyflow Fume Cupboards comply with the
Australian Standards 2243.8 and is wholly manufactured in Australia.
Materials of construction, depending on what hazardous acids
are being used within the fume cupboard, will be specially determined.
Johndec Safetyflow Fume Cupboards can be manufactured in:
- Polyvinyl chloride sheet (PVC)
- Polypropylene sheet (PP)
- Polyvinyl dene fluoride sheet (PVDF)
- Fibre Reinforced plastics (FRP)
- Fibre cement
Johndec Engineering Plastics Pty Ltd has adapted the world's
most up to date technology in the design and manufacture of Johndec
Safetyflow Fume Cupboard.
CHAMBER
The chamber has an aerodynamically shaped roof, which is contoured
towards a rectangular extraction outlet to assist in an even extraction
rate across the width of the opening. It has radius corners and
is fully plastic welded to the fume cupboard.
 LIGHT
The completely sealed fluorescent light is mounted in a purpose
made moulded cover on the exterior of the chamber. It illuminates
the interior of the work area via a transparent acrylic panel,
which is set flush with the interior of the chamber to avoid disturbing
the smooth airflow inside the chamber. This moulded cover, complete
with the light fitting, can be removed without disturbing the
interior of the fume cupboard or the transparent panel.
FACIA
The fume cupboard's facia is aerodynamically shaped to ensure
an even flow of air into the chamber. The light and fan switches
are contained in an electronic module with LED status. The module
is flush mounted on the facia.
WORK BEDS
The specially designed removable work bed is flat and, due to
its special design, does not require drip-cups, troughs for the
draining of liquids. This gives a maximum available working surface.
The worktop can be removed to reveal a full width moulded sump
fitted with a waste outlet. The standard worktop is made from
chemical resistant, epoxy resin and is moulded on buffers above
the full width sump. Alternative worktops together with sinks
and covers can be supplied on request.
SASH
The counter-balanced sash windows are of the vertically sliding
sash type supported on stainless steel cables and running on two-acetal
pulleys. The sash counter-weights run inside a fully enclosed
profiled section. Sash windows are 6mm toughened glass. As an
option the sash glass can be covered with safety film. Alternatively
clear PVC, acrylic or polycarbonate can be supplied.
SERVICES
Various remote controlled services can be fitted to the fume cupboard
facia. All handles are fitted with colour coding to the International
Standard. All internal outlets are mounted on the sidewalls to
retain maximum working area and are colour coded with an electrostatically
applied epoxy finish.
Compressed air, gas, nitrogen, vacuum, etc. control valve incorporate
floating brass needles which are self aligning on the seat.
Services are pre-plumbed within the fume cupboard with copper
tube, approved by the water board and the Australia Gas Association.
The site plumber leaves a tail for easy connection to main service.
BY-PASS
All fume cupboards are normally fitted with an air by-pass system
fixed to the front facia, to control the velocity at the lower
sash opening position. With the sash fully raised, the by-pass
system is completely sealed off to give all the available extraction
through the sash opening for maximum safety. The extraction rate
from the fume cupboard remains constant irrespective of the position
of the sash.
BACK BAFFLE
The chamber of the fume cupboards can be fitted with a specially
designed back baffle fastened to the fume cupboard with polypropylene
bolts, it is removable for cleaning purposes. This special back
baffle allows for the whole chamber to be scavenged whether heavy
or light corrosive fumes are present. The back baffle is recommended
if it is anticipated that a lot of heavier-than-air fumes are
to be used continuously in the fume cupboard.
JOHNDEC SUPPORT CUPBOARDS
The support units can be manufactured to suit customer requirements,
commonly manufactured from epoxy coated steel, timber and finished
in laminate. They can be open or fully enclosed with polypropylene
or PVC. Complete with doors, handles and adjustable shelf. It
has a removable back for access to any service mounted on the
wall behind it. The support cupboards are also specially designed
to house the Johndec recirculating tank, pump etc on specially
moulded spillage tray when used in conjunction with the Johndec
Fume Scrubber.
WASH DOWN SPRAY
The cupboards can be fitted with a spray bar, usually mounted
behind the back baffle. The spray bar is activated by remote controlled
valve fitted to the facia. This wash down spray assists in the
decontaminating of the chamber behind the back baffle after using
perchloric acid, etc. It can also be made to operate automatically
via the Johndec Fe2000 Fume Control System.
HAND HELD WASH DOWN
The fume cupboards can also be supplied with a hand held wash
down spray, mounted on the side of the fume cupboard to assist
the operator in washing the internal surfaces of the fume cupboards
when perchloric acid or other dangerous acids are being used.
A remote controlled valve mounted on or adjacent to the fume cupboard
activates the spray outlet. The spray may also be used as a safety
shower in cases of splashes reaching the operator.
ADDITIONAL SINK
The fume cupboard base can be fitted with a sink moulded into
the standard full width concealed sump. The epoxy resin worktop
is cut to expose the sink and a replaceable cover can be supplied
to retain the uncluttered worktop when not in use.
JOHNDEC FE2000 FUME CONTROL SYSTEM
The fume cupboard can be supplied with Johndec Fe2000 Fume Control
System, which is an intelligent microprocessor controlled device.
The majority of the functions are controlled by the software stored
in the unit EPROM and hosted by the microprocessor. The use of
the software control allows significant operational flexibility,
with scope for tailoring operation to particular user requirements
and to implement future upgrades. The Johndec Fe2000 Fume Control
System incorporates normal functions for operation of fume cupboard
light, exhaust fan spray bar and fume scrubber pump. The system
also incorporates pre purge, post purge, emergency isolation of
services as required to comply with AS2243.8, AS3000, and AS2430.3.
The system has an alarm to indicated power failure to the fume
cupboard and battery backup.
PRE WIRING
All electrical controls and components are pre wired to AS3000
to input and output terminals for site electricians. This avoids
a site electrician working under cramped conditions on a product
which he may not be conversant with.
AIRCONSERVER BYPASS DAMPER
The Johndec Airconverser Energy Saver System will maintain a constant
velocity across the fume cupboards sash of 0.5 m/s at all opening
positions. The Airconserver is fitted with a special sash sensor,
which is connected electrically and mechanically to the fume cupboard
sash balance mechanism. This synchronises the volume flow of the
air bypass damper to the sash opening. The Airconserver will give
immediate response to any sash movement.
AUTOMATIC SASH
The fume cupboard can be fitted with an electronic automatic sash
"Autosash" which is controlled via the Johndec Fume
Control System, incorporating up, down and stop control buttons.
The Autosash also incorporates an attendance sensor, which controls
the fume cupboard sash when left unattended. If the sash is left
open or unattended for a period of two (2) minutes, the attendance
sensor will command the sash to close automatically.
OPTIONAL FUME SCRUBBING
Efficient fume scrubbers are essential fittings on fume cupboards.
Designed for work with such substances as perchloric acid. Their
installation may be desirable or mandatory on other fume cupboards
where highly corrosive substances are in use, or where there are
problems with sash discharge of gaseous effluent. Johndec Engineering
Plastics Pty Ltd manufactures a superior range of fume scrubbers.
Information on this range will be supplied on request.
Special Requirements
Johndec Engineering Plastics Pty Ltd will manufacture fume cupboards
to suit customer requirements:-
- Extra width and depth fume cupboards
- Doubled sided fume cupboards
- Walk-in fume cupboards
- Down draught fume cupboards
- Recirculating fume cabinets (ductless fume cabinets)
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