“Flowchem” PGP Series Pumps Are Rotary Type Positive Displacement Pumps Are Capable Of Handling Liquid Of Any Viscosity. The Pump Has Self Priming Capability However Some (Net Positive Suction Head) NPSH Is Always Required To Avoid Cavitations Depending Upon Liquid To Be Pumped And Pump Speed.Standard Ci Construction Gear Pump with Bush Bearings For The Liquid Having Not Very Good Lubrication Properties.