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Friatec introduces a submersible pump for aggressive media

Pumping of molten salts used as a heat transfer and storage medium represents a challenging task in solar power stations.

Friatec’s Rheinhütte Pumpen division has released the new GVSO chemical submersible pump for pumping aggressive, hot and contaminated media.

The vertical pump enables the safe pumping of acids and lyes in all concentration and temperature ranges.

Flexible submersion depth adaptations are facilitated by the multi-stage vertical high-pressure pump concept for delivery volumes of over 1000 m3/h, a pressure requirement of 64 bar and temperatures up to 600 degrees in solar thermal power towers up to a delivery head of 320m.

According to the manufacturer, the GVSO’s stainless and heat-resistant steel design with medium-lubricated sleeve bearings is leak-free, compact and maintenance-friendly, with a variety of sealing variants.

The submersible pump is used as a main supply pump for salt-based heat storage systems and system components in the salt system melting and filling process and peripheral areas to protect the plant. 

The vertical GVSO is used in all processes involving molten sulphur in the chemical and petrochemical industry because its multi-stage volute casing enables the achievement of high medium discharge heads.  

The pump series is available in 28 sizes and single or multi-stage designs for maximum flexibility.

Dry gland packing systems (including gas barrier designs), mechanical seal concepts with an additional gaseous or liquid barrier and magnetic couplings are available for specific pumping tasks.

The design of the dry magnetic coupling which lies outside the pumping system also enables use of the GVSO for toxic and odorous liquids at liquid temperatures of up to 250°C.

In addition, connection dimensions and the shape of the sole plate on the tank and pressure flange can be individually adapted.

The pump can be employed as a heated design with a heating jacket for all media pumping areas in pumping tasks with constant temperatures and viscosities (e.g. molten sulphur).

The GVSO pump series meets international requirements according to ISO 5199 and ISO 13709 (API 610 11th Edition, Type VS4).