Lincoln Electric 718115 Spirit II 275 - Manual (Page 18)

Section 2: Specifications Spirit II User’s Manual
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non-U.S. persons or transferred by any means to any location outside the United States contrary to the requirements of the EAR.
2-6
Gas Supply Requirements
Plasma gas types:
Mild Steel ..................................................... Oxygen
Stainless Steel ............................................ Air or H17
Aluminum .................................................... Air
Shield gas types:
Mild Steel ..................................................... Oxygen or Air
Stainless Steel ............................................. Air or Nitrogen
Aluminum .................................................... Nitrogen
Preflow gas type ............................................... Oxygen and Nitrogen
Marking gas type............................................... Nitrogen or Argon
Plasma gas flow rate (maximum):
Oxygen or Air ............................................... 67 scfh (1897 liters/hour)
H17 .............................................................. 75 scfh (2124 liters/hour)
Shield gas flow rate (maximum):
Oxygen ........................................................ 19 scfh (538 liters/hour)
Air or Nitrogen ............................................. 225 scfh (6371 liters/hour)
Preflow gas flow rate (maximum) ...................... 60 scfh (1699 liters/hour)
Marking gas flow rate (maximum) ..................... 79 scfh (2237 liters/hour)
Rated Inlet gas pressure ................................... 115 psi (7.9 bar)
Minimum Inlet gas pressure .............................. 110 psi (7.6 bar)
Maximum Inlet gas pressure ............................. 145 psi (10.0 bar)
Oxygen and nitrogen should be supplied with a purity of at least 99.5%.
H17 should be supplied with a purity of at least 99.995%.
A potential fire hazard exists when cutting with oxygen. KALIBURN recommends
that an exhaust ventilation system be used when cutting with oxygen. Flashback
arrestors must be supplied (unless they are not available for the chosen gases
and pressures) to prevent a possible fire from propagating back to the gas
supplies.
Ensure that oxygen lines remain free from contaminants such as oil and grease. The
mixture of such contaminants with oxygen presents an additional fire hazard.
Compressed air must be clean, dry, and oil-free and may be supplied from compressed
cylinders or from an air compressor. Be aware that shop air systems are prone to oil
and moisture contamination. If shop air is used, it must be cleaned to ISO 8573.1:
Class 1.4.1. Specify dry air when using compressed cylinders. Breathing quality air
contains moisture and must not be used.
3/8” (inside diameter) hoses are required for all inlet gas connections. Mating
connectors are supplied with the unit. Quick-connect fittings must not be used.