Hypertherm XPR300, Instruction Manual

Page: 47 / 402

Qualifications and Requirements
2
XPR300 Instruction Manual 809480 47
Shield water requirements (VWI and OptiMix)
If you use water as a shield fluid, see Table 9 for water pressure and flow requirements and Table 10
for water-purity guidelines.
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 (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.
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:
• A water softener if the water has high particulate or
mineral content (see Table 10 on page 47).
• Treatment of incoming shield water with a filter rated to
50 microns or less.
2.76 bar (40 psi)
minimum
7.92 bar (115 psi)
maximum
35 L/h (9.4 US gal/h)
Particulate type Purity requirement
Total dissolved solids < 61 PPM
C magnesium < 40 PPM
Silica < 5 PPM
pH 6.5 – 8.0