Installation
XPR300 Instruction Manual 809480 121
Table 20 – Recommended sizes for gas fittings
Figure 31 – Connect the supply gas plumbing and gases to the Core gas connect console
* For the best results, make sure that the cutting system is ready for use and the gases are flowing when you
select gas regulator settings, similar to testing gas preflow and cutflow.
1. Make sure that you have the correct supply gas hoses before you connect them. Hypertherm
recommends an internal diameter of at least 10 mm (0.375 inch) for supply-gas hoses that are
76 m (250 feet) or less.
2. Tighten all fittings to the torque specifications in Table 19 on page 118.
3. After installation is complete, pressurize the entire system and look for gas leaks. A licensed
plumber can do this for you.
Fitting type Size
N
2
/ Ar 5/8 inch – 18 RH, internal (inert gas) “B”
Air 9/16 inch – 19, JIC #6
F5 / H
2
9/16 inch – 18, LH (fuel gas) “B”
O
2
9/16 inch – RH (oxygen)
Oxygen (O
2
)
Nitrogen (N
2
)
Air
Regulators*
Oxygen (O
2
)
Nitrogen (N
2
)
Air
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