This type is one of the most basic paddle designs. At low speeds, it mainly generates horizontal circulation; at high speeds, it creates radial flow; when equipped with baffles, it produces vertical circulation. It is suitable for mixing, homogenizing, blending, dissolving, heat transfer, or crystallization of low-viscosity liquids. It also operates in laminar flow conditions at high viscosity and uses multi-layer, large-diameter, low-speed agitation.