IR Furnace Features

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Base Equipment and Options (H - K)

KEYDESCRIPTION
HCHermetic Chamber. Adds sealed lamp-end plenums, plumbing and flowmeters necessary to operate the furnace at the lowest level of oxygen (O2) or moisture contamination from ambient air. During operation, process gas, under flow meter control, is fed to the plenum boxes under pressure to prevent ambient air from entering the furnace chamber through the lamp seals. Chamber gaseous contamination levels can be held typically to ≤20 ppm. This option, when utilized with nitrogen (N2) or forming gas (N2/H2 mix) process atmospheres prevents the oxidation of metal surfaces during processing. The option must be ordered before NO, HO, OSS, OA or MA options can be included. Option available on most furnaces. IR Furnace Optional Equipment
HDHydrogen Detection. Combustible gas detectors mounted at entrance, exit and in control enclosures detect and alarm in the presence of hydrogen above safe concentrations. Integrated with the furnace software for emergency purge and shutoff in the event of an alarm . Option, required with HO and HO/NMH. IR Furnace Optional Equipment
HOHydrogen Operation. Electro-mechanical control of the atmosphere required for hydrogen (H2) operation with more than 5% H2 concentration. The H2 cycle includes a nitrogen (N2) chamber purge and provides power to H2 igniter coils on exhaust stacks at the entrance and exit of the heating chamber. Included is fail-safe automatic N2 purge, and audio and visual alarms in the event of a failure of an igniter coil, or loss of N2 or H2 pressure. Includes special H2 valve and controls enclosure with constant N2 purge. Control circuitry visibly indicates the gas or gases flowing to the process and all alarm conditions. All curtain, eductor and cooling gas is N2. Requires HO/HNM option with enclosure and HD option. Also requires IPS, HC, OSS and OA options. Optional on some furnaces.IR Furnace Optional Equipment
HO/NHMHydrogen Operation-Nitrogen Hydrogen Mixing. Provides the facility to mix hydrogen and nitrogen using furnace controls as well as the ability to vary the nitrogen/hydrogen ratio along the length of the furnace. A single mix switch allows gas to flow through both the nitrogen and the hydrogen flowmeters and allows different zones to receive gas with different N2/H2 ratios. Includes HO option. Requires HD option. Also requires IPS, HC, OSS and OA options. Optional on some furnaces. IR Furnace Optional Equipment
HSKHandshake Signaling. NO and NC signals to upstream and downstream equipment or to the production line controller about the furnace status when the furnace is part of an automatic production line. Requires LT option. Option available on all furnaces. IR Furnace Optional Equipment
HTHigh Temperature Operation. High temperature construction for furnace operation above 500C up to 1000C. Includes upgraded insulation and materials, changes BSS 316 stainless steel belt to BNV Nichrome material, and adds cabinet temperature thermocouple plus alert/alarm on cabinet temperature. Option available on most furnaces.
IEIntermediate Exhaust Eductor. An exhaust stack with eductor that is located between selected chambers to increase control of process gas flow, to promote isolation of specific furnace chambers and to evacuate volatile emissions off-gassed from product. Standard on some furnaces.   IR Furnace Stardard Equipment
IPSInlet Pressure Switch. Pressure switch upstream of the gas distribution system that signals the operator and the furnace control system in the event of pressure loss in the process gas supply line. Furnace PROCESS START mode will be inhibited automatically until pressure is restored to normal. Option available on most furnaces. IR Furnace Optional Equipment
IR-EInterface Roller, Entrance. Small diameter belt rollers at the entrance of the furnace that permit close transfer of parts from upstream conveyor equipment. The rollers are less than 3 inches (76.2 mm) in diameter. Adds 6.4 cm (2.5 inch) to the length of the furnace. Option available on most furnaces.  IR Furnace Optional Equipment
IR-XInterface Roller, Exit: Small diameter belt rollers at the exit of the furnace that permit close transfer of parts to downstream conveyor equipment. The rollers will be less than 3 inches (76.2 mm) in diameter. Adds 6.4 cm (2.5 inch) to the length of the furnace. Option available on most furnaces.   IR Furnace Optional Equipment

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