Syre-stinkskabe GB - Flipbook - Side 9
FUME CUPBOARDS DESIGNED FOR WORK WITH PERCHLORIC ACID (HCLO4) AND POTENTIAL HIGH HEAT
COMMONLY REFERRED TO AS: ZAFE 81 PERCHLORIC ACID OR ERGO ZAFE 83 PERCHLORIC ACID
DEFINITION
Work is conducted with perchloric acid, and high temperatures are involved.
Optional: PP (polypropylene) is standard for the back
wall. Special PP is used for fitting rail mounting.
CONSIDERATIONS
CONSTRUCTION OF THE FUME CUPBOARD
- The interior of the fume cupboard is lined with polypropylene.
- The fume cupboard is equipped with a »wash down
system« in the ventilation duct and that rinses behind
the back panel.
- The fume cupboard features a ceramic heat shield
above the worktop.
- The exhaust duct is made of polypropylene and equipped with water nozzles.
- Metal parts are coated with technical Teflon polytetrafluoroethylene (PTFE) and are therefore black.
- The worktop material can be made of ceramic.
- The front glass is made of tempered safety glass.
- The front glass is top-hinged with a wire.
- There is temperature measurement inside the fume
cupboard.
- The fume cupboard must be ventilated with an extra high
volume, and it is recommended that the airflow speed be
tripled compared to a standard fume cupboard.
- Due to the »wash down system,« a significant pressure
loss is expected, which can only be measured once the
cupboard is operational.
- It is recommended that the fume cupboard is delivered
with a fixed height to avoid height adjustment, as this
requires highly chemical-resistant flexible piping.
- Fittings can be Teflon-coated, depending on requirements.
BROENLAB:
Standard: Can withstand most conditions, color 2700.
Special: Satin chrome TI69. Chrome/silver-colored, suitable for e.g., acetone.
Special: Chemicoat TI55. Teflon coating. Expensive solution.
ARMALAB:
Standard: Epoxy-coated with a smooth surface. Can
withstand acids to a certain extent.
Choosing this fume cupboard means opting for a solution
designed for work with perchloric acids and high heat. Since the work involves handling and operating with strong
acids and high temperatures, only a fully integrated polypropylene cabinet is suitable. Therefore, special attention
must be paid to what is placed on the worktop. Heating
units should be positioned on a ceramic tile to create a
barrier between the heat source and the worktop.
CERTIFICATION OF THE FUME CUPBOARD
If the customer requires the fume cupboard to be certified, the applicable standard will be EN14175 part 7, which
covers testing and certification of acid-resistant fume
cupboards. Additionally, Danish regulations require that
the fume cupboard undergoes a tracer gas test according
to DS 457 in the laboratory before it is put into use.
MAINTENANCE AND INSPECTION
It is recommended that the fume cupboard be inspected
and serviced every 3-6 months, depending on its usage. For
safety reasons, it is crucial to regularly check mechanical
parts, load-bearing components, and the ventilation system,
with at least the mentioned interval. Zystm offers a service
package specifically tailored for this type of fume cupboard.
Acid fume cupboards | 9
