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3.8 Water Quality
3.8.1 Built-in Steam Generator
The distilled or mineral – free water supplied to the steam
generator shall be according to the table below:
A Reverse Osmosis system meeting the qualifications below
may be used to provide water for the steam generator. The
better the quality of the water, the better performance, the less
maintenance and the longer the life of the autoclave.
Mineral Free Water qualifications
(In compliance with ISO 11134 and ISO 13683)
Evaporate residue
≤ 15 mg/l
Silica
≤ 2 mg/l
Iron
≤ 0.2mg/l
Cadmium
≤ 0.005 mg/l
Lead
≤ 0.05 mg/l
Rest of heavy metals
≤ 0.1 mg/l
Chloride
≤ 3 mg/l
Phosphate
≤ 0.5 mg/l
Conductivity
≤ 50 µs/cm
pH
6.5 to 8
Appearance
Colorless, clean, without sediment
Hardness
≤ 0.1 mmol/l
Attention:
The use of water in the autoclave that does not comply with
the table above may have severe impact on the working life
of the sterilizer and can invalidate the manufacturer’s
warranty.
The suitability of the mineral free water to be used should be
verified by testing in accordance with the above table; at an
authorized laboratory using acknowledged analytical
methods. We recommend testing the water quality once a
month.
3.8.2 Water for the Vacuum System and the Drain Cooling
The feed water supplied, typically from a public water system,
to the liquid ring vacuum pump must meet the following
requirements:
♦ Hardness: 0.7 - 2 mmol/l.
♦ Water temperature: shall
not exceed 59°F (15°C).
Note: The use of hard water in the vacuum pump may invalidate
the warranty for the vacuum pump, since it can cause
blocking of the rotor, which can damage the pump.
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