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3.6
Water Quality
The distilled or mineral-free water supply shall be according to the table
below:
Physical Characteristics and Maximum acceptable contaminants levels
in water or steam, for steam generator and sterilizers
Contaminants in
water supplied to
generator/chamber
Contaminants in
condensate
at
steam
inlet to sterilizer
Evaporate residue
≤ 10 mg/l
N/A
Silicate (SiO
2
)
≤ 1 mg/l
≤ 0.1 mg/l
Iron
≤ 0.2mg/l
≤ 0.1mg/l
Cadmium
≤ 0.005 mg/l
≤ 0.005 mg/l
Lead
≤ 0.05 mg/l
≤ 0.05 mg/l
Rest of heavy metals
except iron,
cadmium, lead
≤ 0.1 mg/l
≤ 0.1 mg/l
Chloride (Cl)
≤ 2 mg/l
≤ 0.1 mg/l
Phosphate (P
2
O
5
)
≤ 0.5 mg/l
≤ 0.1 mg/l
Conductivity (at
25°C)
3 to 15 µs/cm
≤ 3 µs/cm
pH value (degree of
acidity)
5 to 7.5
5 to 7
Hardness (Σ ions of
alkaline earth)
≤ 0.02 mmol/l
≤ 0.02 mmol/l
Appearance
Colorless, clean, without sediments
Compliance with the above data should be tested in accordance with
acknowledged analytical methods, by an authorized laboratory.
Attention:
The use of water for autoclaves that do not comply with the table
above may have severe impact on the working life of the sterilizer
and can invalidate the manufacturer’s guarantee.
Use only deionized water, having a maximum conductivity of 15
µs/cm. Conductivity greater than 15 µs/cm may cause failures.
Tap water supply
The range of hardness value 0.7-2.0 mmol/l (70- 200 mg/l CaCO
3
)
The use of soft water is strictly forbidden!
Please consult a water specialist!
