Kuyambitsa PST4 mndandanda wa Close Coupled Centrifugal Pump, kukweza komaliza kwa mapampu amphamvu kale a PST.Ndi ntchito zowonjezera komanso mphamvu zochulukirapo, mapampu awa ndi chisankho chabwino kwambiri pazogwiritsa ntchito zosiyanasiyana.