Semi open impeller semi open impeller is divided into the first half open and half open impeller 2. Commonly used before the semi open impeller, semi open impeller with rear cover plate and a blade, the structure of the impeller, the efficiency of the centrifugal pump is generally not high, but the impeller can deliver a certain solid particles, fibers, and other media. Due to the advantages of this impeller structure more and more applications are applied in the chemical centrifugal pump above the occasional solid particles.
The closed impeller is composed of front and back cover plate and blade. The efficiency of closed impeller is higher, but the gap between the impeller is narrow pass but impurities, especially small centrifugal pump impeller requires transport of the medium is clear, the viscosity can not be large, can not contain fiber material. At present most of the centrifugal pump or the use of the impeller, such as ISG pipeline centrifugal pump, ISW horizontal centrifugal pump, etc..
