The Wilo-Flumen OPTI series is a direct-drive submersible mixer series with 5.5- to 15.75-inch-diameter propellers optimized for efficiency and durability. The series offers cast stainless steel propellers (200 to 1,300 N thrust range) with the same hydraulically efficient backswept profile as found on Wilo’s medium-speed planetary gear-reduced mixer series. Each propeller blade has a hydrofoil profile that achieves thrust-power ratios according to ISO 21630. Propeller clogging is minimized through computational fluid dynamics-based design and extensive testing. Single- and double-row ball bearings support the stainless steel shaft. A moisture-sensing electrode located in the seal chamber and auto-reset winding thermal sensors are standard equipment. 888-945-6872;


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