Strainers

Filters

Whilst strainers remove all visible particles in the steam, it is sometimes necessary to remove smaller particles, for example, in the following applications:

When there is direct injection of steam into a process, which may cause contamination of the product.

Example: In the food industry, and for the sterilisation of process equipment in the pharmaceutical industry.

Where dirty steam may cause rejection of a product or process batch due to staining or visible particle retention.

Example: Sterilizers and paper/board machines.

Where minimal particle emission is required from steam humidifiers.

Example: Humidifiers used in a ‘clean’ environment.

For the reduction of the steam water content, ensuring a dry, saturated supply.

In such ‘clean steam’ applications, strainers are not suitable and filters must be used. A filter used in a steam system typically consists of a sintered stainless steel filter element. The sintering process produces a fine porous structure in the stainless steel, which removes any particles from fluid passing through it. Filters capable of removing particles as small as 1 μm are available, conforming to the good practice needs of culinary steam.

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