Semi-Open Impeller Centrifugal Pump

The reason for this middle solution is to balance the two extremes. A closed impeller is the most efficient on clean liquid but the most sensitive to clogging; an open impeller is the most tolerant but the least efficient. A semi-open impeller allows a moderate passage of solids and fibres together with acceptable efficiency — usually the right choice on lines where the liquid is not entirely clean but not heavily fouled either.

On the stainless models in our catalog the pumped liquid temperature is -15 °C to +110 °C, rising to 120 °C with a special seal. Maximum working pressure is 8 bar. Connections are configured as DWC-N threaded or DWC-V victaulic; bodies are 304, 316 or 316L stainless steel. An intermediate coupling element that prevents the motor from being damaged by liquid leakage is standard.

For the compatibility of the stainless grade with your fluid, see our pump material selection guide and chemical compatibility chart.