Gas Supply Requirements - Lincoln Electric spirit II 150 Technical Manual

Section 2: Specifications

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 ............................................... 30 scfh (850 liters/hour)
H17 .............................................................. 56 scfh (1586 liters/hour)
Shield gas flow rate (maximum):
Oxygen ........................................................ 19 scfh (538 liters/hour)
Air or Nitrogen ............................................. 175 scfh (4955 liters/hour)
Preflow gas flow rate (maximum) ...................... 26 scfh (736 liters/hour)
Marking gas flow rate (maximum) ..................... 30 scfh (850 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 purity
should be at least 99.995%. Argon purity should be at least 99.99%. All should be
clean, dry and oil-free.
A potential fire hazard exists when cutting with oxygen. It is recommended 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.
connectors are supplied with the unit. Quick-connect fittings must not be used.
This information is subject to the controls of the Export Administration Regulations [EAR]. This information shall not be provided to
non-U.S. persons or transferred by any means to any location outside the United States contrary to the requirements of the EAR.
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