Polymer extrusion melt gear pumps have been widely used in the production lines of chemical fiber, film, profile, pipe, sheet, cable, compound extrusion, pelletizing, etc. The materials that can be processed cover most polymer materials, such as: PE, PC, PP, PVC, HIPS, PS, PET, PUR, fluoropolymers, poly sulfone, polyester, thermoplastic elastomer, rubber, and hot adhesives. Plastic melt gear pump is mainly used for processing thermoplastic polymer melt with relatively low viscosity, which is wid