Steam turbines need to be free of silica, SiO2 deposits that cause uneven surfaces and increase resistance to steam flow. Silica deposits vary with causes, but the most significant factor in minimizing turbine silica deposits is by maintaining low silica concentrations in boiler water.

Silica

Why Test for Silica?

Silica and silicates are added to water as conditioners, detergents and corrosion inhibitors. However, silica in water can cause significant prob-lems for industries, primarily in boiler and steam applications. High pressures and high temperatures cause silica deposits on boiler tubes and heat exchangers, which can cause a variety of problems including the following:

Measuring silica in water is useful when the efficiency of demineralizers is monitored. Testing for silica (one of the first impurities detected when the exchange capacity of a demineralizer is exhausted) provides a sensitivity check of demineralizer performance.

Hach® offers a variety of testing kits, instruments, reagents and more you need to successfully monitor and manage silica levels in your specific process application.

Featured Silica Products

Laboratory Silica Testing Instruments

Laboratory Silica Testing Instruments

Accurate and precise measurement for laboratory and industrial applications. Hach's benchtop silica meters offer advanced features and user-friendly interfaces.

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Portable Silica Meters

Portable Silica Meters

Both lightweight and durable, Hach portable meters provide on-the-go silica testing that you can rely on in even the most challenging conditions.

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Online Silica Analyzer

Online Silica Analyzer

Hach’s online analyzers for silica offer high precision and low maintenance for colorimetric analysis.

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Silica Test Kits and Strips

Silica Test Kits and Strips

With the simplicity and accuracy of Hach test kits, you can effortlessly get fast results for silica testing in a variety of field applications.

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Silica Reagents

Silica Reagents

Hach’s portable test kits and reagents save you time and money by providing fast, accurate results when and where you need them.

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Which Processes Require Silica Monitoring?

Boiler Water: Scale formation due to hardness, silica, and corrosion product deposits can decrease the heat exchange capacity and global efficiency of the boiler. Steam quality varies with the concentration of impurities in the boiler water and the potential mechanical carryover of contaminated water droplets into the steam. The higher the operating pressure of the boiler, the higher the purity requirements since contaminant carryover is promoted. Silica measurements (drum boiler blowdown): silica build-up in the boiler depends on the drum pressure, < 5 ppb.


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Power and steam

How is Silica Monitored?

Laboratory Testing

Portable Testing (color discs and colorimeters)

Online Process Testing

EZ Series Silica Analysers
EZ1035.XXXXXXXX
Price: Contact Us

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