This system is designed to operate in a positive inert gas atmosphere of 2PSI ( 0.14 kg/cm sq) above atmosphere. A metering gas valve with flow indicator is supplied to quickly back-fill the chamber to a slightly positive pressure after evacuation and to keep a blanket gas flowing while arc melting.
The "furnace atmosphere" means a gas to be filled and heated in the furnace by which the product (workpiece) is indirectly heat-treated. The atmosphere gases include air, inert gases, hydrogen (reducing gas), and others, which are heated up to 1000 - 2500℃ depending on the properties of the workpiece and purpose of the heat treatment.
If inert gas is leaking in from the inert-gas system or from valving on the furnace, it can cause the furnace to exhibit signs of poor pumping, poor leak rates, poor ultimate vacuum, poor ability to pump against normal outgassing loads, backstreaming, etc.
Argon is an inert gas that is used as a sintering atmosphere to prevent gas/solid reactions such as oxidation, nitriding or hydriding. Argon is completely inert, thus, although it can yield sintering atmospheres with low partial pressures of water vapor (dew point), it is extremely difficult and costly to reduce its oxygen partial pressure to below 10 ‒ 6 atm. Inert atmospheres have a
Nitrogen Generator for Blanketing (Covering) Gas: A term used to describe an inert gas such as nitrogen or argon introduced into a furnace to prevent oxidation of the component parts being heat-treated. The flowrate and pressure of the atmosphere and the equipment type (i.e. gas-tight construction) must be sufficient to limit the influx of air.
furnaces to customers involved with steel, titanium and aluminum production as well as aluminum recycling, forging, automotive, aerospace, commercial heat treating, HVAC/R, electronics, wind energy, medical equipment and nuclear industries. The SECO/WARWICK Group produces vacuum furnaces, atmosphere furnaces, controlled
So an atmosphere of natural gas doesn't seem very inert to me. It can however be safely heated way past ignition temperature as long as it is burned off and no oxygen gets into the furnace. Back in the 50's some oxygen got into one of the furnaces and it exploded, killing several nearby workers.
PNF Inert Atmosphere Furnace. The PN Series Inert Atmosphere Ovens are designed to accommodate a wide variety of processes where an inert atmosphere is required to prevent product oxidation. Typical applications include curing, bonding and heat treating.
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201788To exchange the atmosphere, it is also possible to just purge the furnace with inert gas without prior evacuation. This is a practical solution for tube furnaces. However, for a chamber furnace having graphite heating elements and graphite felt insulation, evacuation is the only possible solution.
Blue M Inert Gas Batch Oven. Blue M inert gas batch ovens are designed for durability and performance. Available in six (6) standard sizes, these inert gas batch ovens are ideal for industrial oven applications that involve processing materials in a controlled atmosphere environment.
201698Electric furnaces are oxidising atmospheres. You can get electric kilns that can have argon pumped through them to give an inert atmosphere but they tend to be rather pricey. Gas kilns can be reducing, oxidising or inert depending upon how the gas/air vents are set. you can turn an electric kiln into a reducing or inert
GCF atmosphere furnaces are NOT designed to be vacuum furnaces. Vacuuming is only applicable to pre-vacuum the chamber before the insertion of inert or other protective gases. Used in this way, the ultimate vacuum level for GCF furnaces is approximately 100 Pa (with all-flange connections) and 1000 Pa (with hose barb connections.)