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6.2.2 Connecting the argon supply
Fig. 9:
Argon connector
Crypton sintering requires a reduced-oxygen atmosphere, which is
obtained by the use of argon.
Argon is an inert gas in a compressed-gas cylinder. Attach a
pressure gauge and pressure reducer to the gas cylinder.
The purity of the argon should be at least 4.6 (99.996% v/v).
Connect the argon line to the argon connector at the rear of the
furnace.
To avoid any pressure overload on components installed on the
furnace, the output pressure of the gas bottle should be limited to a
maximum of 10 bar by design.
The output pressure of the gas bottles should be set to between 4
and 7 bar.
To avoid uncontrolled discharges of argon, check the gas lines and
associated couplings for leaks and a secure fit after installation.
The gas volume contained in an argon bottle is enough to flood an
entire room in case of malfunction. Ensure adequate ventilation at
the deployment site to prevent suffocation hazards. We
recommend adequate ventilation at floor level, since the gas is
heavier than air. In addition, protect all pipes, ducts and manholes
against the ingress of gas.
WARNING!
Do not store extra bottles in the same room.
Check the valves of full and empty bottles for
leaks when swapping gas bottles.
Secure gas bottles against tipping.
Perform reagular leak testing.
Observe all relevant safety regulations when handling compressed
gases.
CAUTION!
When using argon in the laboratory, follow the
pertinent national safety regulations (for
Germany: TRGS 526, and especially section
5.2.11, Compressed gas cylinders and fittings)
When replacing the Crypton door by Cercon
door, make sure to disconnect the argon supply
of from the furnace. Otherwise, argon may
escape through the Crypton door uncontrolled
during the Cercon sintering process.
