Qualifications and Requirements
XPR300 Instruction Manual 809480 51
Shield water requirements (VWI and OptiMix)
If you use water as a shield fluid, refer to Table 9 for water pressure and flow requirements and Table
10 for water-purity guidelines.
If using shield water, the temperature range for cutting system operation
and storage is reduced to above 0°C to 40°C (32°F to 104°F).
Table 9 – Quality, pressure, and flow requirements for shield water
Table 10 – Purity requirements for shield water
A TDS meter indicates the Total Dissolved Solids (TDS) of a solution.
Dissolved ionized solids (such as salts and minerals) increase the
electrical conductivity of a solution. Total dissolved solids can be tested
with a TDS meter (Hypertherm Waterjet part number 1-13897) available
from Hypertherm.
* 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. Refer to Shield water
requirements (VWI and OptiMix) on page 51.
Quality*
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
consumables.
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 US gal/h)
Particulate type Purity requirement
Total dissolved solids < 61 PPM
Calcium + magnesium < 40 PPM
Silica < 5 PPM
pH 6.5 – 8.0
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