... /h Products overview:Smooth operation: absolute concentricity of pump shaft and excellent static and dynamic balance of impeller ... .Low noise:low noise, two of the bearing support pump, smooth operation, except slight sound, basic noiseless motor ... directions upward, pipeline layout and installation, save a space. Stainless Steel Self-priming Centrifugal Pump Parameter:a) Caliber: DN25mmb) Flow: 1.5~3. ...