Table 11 - Recommended dimensions for gas fittings
Fitting type Dimensions
N
2
/ Ar 5/8 inch – 18, RH internal (inert gas) "B"
Air 9/16 inch – 18, JIC #6
F5 / H
2
9/16 inch – 18, LH (fuel gas) "B"
O
2
9/16 inch – 18, RH (oxygen)
Shield-water requirements (VWI and OptiMix)
If you use water as a shield fluid, use the following water pressure requirements, flow requirements, and
water-purity guidelines.
If you use water as a shield fluid, the temperature range for cutting system operation and storage
decreases to 0°C to 40°C (32°F to 104°F).
Table 12 - Quality, pressure, and flow requirements for shield water
Quality
1
Minimum and maximum
pressure
Flow rate required
Deionized water is not recommended to use as shield water.
Deionized water will react with the copper components in the
system and result in decreased life of components and con-
sumables.
Hypertherm recommends that you contact a water-quality
expert for guidance.
2.76 bar (40 psi) minimum
8.27 bar (120 psi) maximum
35 L/h (9.4 U.S. gal/h)
1 Water that does not meet minimum purity specifications can cause excessive deposits on the torch nozzle and shield. These deposits can
alter the water flow and produce an unstable arc.
Table 13 - Purity requirements for shield water
Particulate type Purity requirement
Total Dissolved Solids (TDS) < 61 PPM
Calcium + magnesium < 40 PPM
Silica < 5 PPM
pH 6.5 - 8.0
A TDS meter identifies the concentration of dissolved ionized solids
(such as salts and minerals) and their increase in electrical conductivity
Qualifications and Requirements
2
55811530Instruction ManualXPR460
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