Cast Iron 3500 RPM 5.5" Semi-Open Impeller
A Semi-Open Impeller is a versatile pump component that features vanes attached to a single shroud on one side, with the other side remaining open to the pump casing. This hybrid design strikes a balance between the high efficiency of an enclosed impeller and the solids-handling capability of an open impeller. It is engineered to manage liquids containing small to moderate amounts of suspended solids, stringy materials, or gentle abrasives, making it a robust and adaptable solution for wastewater, industrial process, and certain slurry applications.
While slightly less efficient than a fully enclosed design, the semi-open impeller offers superior resistance to clogging and is easier to clean and maintain. The open side allows for the passage of solids, and the clearance between the vane tips and the pump casing can often be adjusted to restore performance as wear occurs. This combination of durability, serviceability, and handling versatility makes it the workhorse choice for challenging, variable-duty services where reliability is paramount.