The SPIRAM centrifugal pump uses a specially designed screw-shaped impeller to feed the pumped fluid into the conical inlet chamber. The impeller then uses the centrifugal force generated by the impeller to push the pumped fluid out of the pump.
The construction of the screw-shaped, single blade is specially designed for low rotational speeds of impeller, avoiding the destruction of hydraulic parts by abrasive particles. This means that the design of the pump has been perfectly executed not only to prevent clogging but also to guarantee the long lifetime of the pump
Each screw-shaped impeller on SPIRAM pumps is designed with an emphasis on the free ball passage. Thanks to this, the pumps are able to handle solids of sizes up to 100% of the discharge flange diameter.
The combination of the conical narrowing of the meridional cut, the small wrap angles of blades and the low lead-in angles of the fluid path promote movement of the product from the impeller suction side to the discharge section with minimal opportunity to cause blocking. In general, the type of hydraulics involving a single bladed screw pump with an impeller eliminates the possibility of clogging it. What passes through the inlet port will also pass through the outlet port, thanks to the volute rising towards the rear side.
Furthermore, hydraulics working on such a principle minimize the time of the fluid flow through the pump while reducing the abrasive effect on the pump caused by gravel, sand or similar fine solids.