Thermo Scientific thermoflex, Быстрые руководства пользователя

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Section 3
ThermoFlex 3-17
Thermo Scientific
Process Fluid Permissible (PPM) Desirable (PPM)
Microbiologicals
(algae, bacteria, fungi) 0 0
Inorganic Chemicals
Calcium <25 <0.6
Chloride <25 <10
Copper <1.3 <1.0
m i i in cont ct ith min m
Iron <0.3 <0.1
Lead <0.015 0
Magnesium <12 <0.1
Manganese <0.05 <0.03
Nitrates\Nitrites <10 as N 0
Potassium <20 <0.3
Silicate <25 <1.0
Sodium <20 <0.3
Sulfate <25 <1
Hardness <17 <0.05
Total Dissolved Solids <50 <10
Other Parameters
pH 6.5-8.5 7-8
Resistivity 0.01* 0.05-0.1*
* M
Ω
-cm (compensated to 25°C)
Process Water
Quality and
Standards
Additional Fluid
Information
When using the ThermoFlex chiller to circulate through aluminum, use a
compatible corrosion inhibitor to prevent galvanic corrosion.
Visible pump weepage may occur when compatible glycols, oils or other
additives are used. Pump weepage is considered as a normal operating
condition of mechanical seal pumps.
corrosion. These contaminants can function as electrolytes which increase the
potential for galvanic cell corrosion and lead to localized corrosion such as
pitting. Pitting may become so extensive that it causes a breach in the cooling
As an example, raw water in the United States averages 171 ppm (of NaCl).
The recommended level for use in a water system is between 0.5 to 5.0 ppm
(of NaCl).
3
Ω
-cm
over-time.) Do not use untreated tap water as the total ionized solids level
may be too high. This will reduce the electrolytic potential of the water and
prevent or reduce the galvanic corrosion observed.