PSI Polymer Systems Inc.

Extrusion Gear Pump

PSI Extrusion Gear Pumps (EGP) deliver exceptional metering control for polymer and hot melt adhesive extrusion and vessel applications. With pumping efficiencies typically 99.5% or better, EGP gear pumps deliver precise volumetric output and take on the pressure building function for the die. Extruder-related die pressure swings are dampened by 20:1 up to 50:1 and gauge is controlled to nominally +/- .25%. The resulting gains in product consistency and quality assure greater yield, higher profitability, and lower scrap rates.

Each full revolution of the tight-tolerance, counter-rotating gears delivers a precise linear volume of output, assuring optimal metering efficiency across the speed range. In addition to boosting extruder output per screw RPM by at least 10%, the gear pump delivers added benefits of lower shear stress, lower extruder energy consumption, lower mean processing temperature due to lower head pressures, and less wear on the extruder screw and barrel from backpressure. The PSI Extrusion Gear Pump is capable of processing highly filled polymers, fractional melts, recycled plastics, low viscosity materials and can operate at pressures up to 5,000 psi [345 bar] (4,000 psi [275 bar] ΔP).