Different types of TIG welding equipment are available through normal supply channels. Water-cooled torches
and air-cooled torches [torch] are both available. Each type carries different amperage ratings. Consult the appropriate manual covering the type torch used. 
Argon is supplied in steel cylinders containing approximately 330 cu ft at a pressure to 2000 psi (13,790 kPa). A single or two stage regulator [pressure regulator] may be used to control the gas flow. A specially designed regulator[pressure regulator] containing a flowmeter may be used. The flowmeter provides better adjustment via flow control than the single or two
 stage regulator and is calibrated in cubic feet per hour (cfh). The correct flow of argon to the torch is set by turning the adjusting screw on the regulator [pressure regulator]. The rate of flow depends on the kind and thickness of the metal to be welded.