Carbolite Gero GPCMA 174, Инструкция по установке и эксплуатации

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6.5 Gas Flow Rates
The GPCMA gas system includes two gas flow rates, purge (high) and process (low):
l
The purge flow rate is used initially to reduce oxygen levels within the retort cham-
ber and create an inert gas atmosphere.
l
The process flow rate is used during heating to maintain the atmosphere within the
retort chamber.
Specific gas flow rates will vary depending on the application, however typical flow
rates are as follows:
l
Purge - 20-50 litres per minute
l
Process - 3-15 litres per minute
Note: The flow rates can be adjusted to suit your process. If the material being
processed produces fumes (offgassing) then a higher process flow rate may be
required to compensate.
6.6 Forced Cooling Option (if fitted)
The forced cooling system blows room temperature air around the outside of the retort,
enabling the retort to cool quickly whilst maintaining an inert atmosphere. Its operation
is entirely controlled via program segment events within the temperature controller/
programmer.
Two actuated damper valves, one mounted within
the furnace case towards the rear, and one
connected to the chimney, reduce natural air flow
around the retort when the forced cooling fan is
not in operation.
This option can reduce furnace cool-down times by almost 50%, and is ideal for
processes that require rapid cooling of work pieces, whilst providing the potential for
increased throughput.
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