PSI-Polymer Systems, Inc. products

PSI Extrusion Gear Pumps are designed to offer precise metering control for the extrusion of polymers and hot melt adhesives. These pumps are engineered with high efficiency, achieving pumping rates of typically 99.5% or higher. They effectively maintain consistent die pressure, reducing pressure swings by a ratio of up to 50:1. The precise linear volume output per gear revolution facilitates improved product consistency and quality, leading to greater yield and profitability. These pumps can enhance the output per screw RPM by at least 10% while minimizing shear stress and energy consumption. Additionally, they contribute to a lower processing temperature due to reduced head pressure and diminished wear on extruder components. Capable of processing materials up to 5,000 psi pressure, these pumps handle highly filled polymers, fractional melts, and low viscosity materials efficiently.

Extended Area Continuous (EAC) screen changers are utilized on high output polymerization and compounding operations.  Engineered for production rates up to 100,000+ lbs/hr (45 tonnes/hr), the EAC performs screen changes with no process interruption or reduction in output.  High-efficiency candle filter assemblies offer low residence time and maximum filter area in a compact space.  During screen change a minimum of 75% of available screen area remains on-line. Pleated filters are optionally available to increase standard wire-cloth filter area by approximately three-times.

Continuous flow with integral divert for applications able to tolerate a multi-second shift to divert.  In the process position, the melt flow passes through upper and lower filter packs.  Filter changes and air purge functions are as standard for continuous screen changer operation. Orientation is available for horizontal and vertical mounts. To operate in divert mode, the lower cross-bolt fully retracts, withdrawing the on-line filter from the melt flow and accessing the divert port.  The upper filter remains online.  Because the divert ports to atmosphere, all material flows through the divert port, bypassing the upper filter.

PSI Diverter Valves (DIV) direct the flow of a fluidized material stream to a selectable destination.  Used in polymer, hot melt adhesive, food, and chemical applications, diverter valves are commonly supplied in a two-position (process/dump) configuration to facilitate start-up, drum-fill operations, or redirection to a secondary process.  For pelletizing operations, the dump position segregates start-up materials, including off-spec generated during crossover for material or color changes. Once the material flow and quality are fully established, a quick shift to the online position assures optimal pressure and flow to the die. For drum or vessel fill operations, the dump position is used for bypass.  

The Uniflo Static Mixer (USM) by PSI-Polymer Systems is designed for continuous in-line mixing, making it ideal for applications involving polymers, colorants, adhesives, and other fluid materials. This mixer employs a series of highly polished, alternating 90° helical elements which provide efficient radial and axial blending, ensuring homogeneous mixing and flattening of melt temperature gradients. Built with robust high-strength elements, the mixer contains no moving parts, minimizing drag and simplifying maintenance. The unique configuration allows fluid flow to simultaneously split, blend, and change direction as it moves through each element. This design squares the number of splits with each successive element, enhancing mixing efficiency. Additionally, the USM mixer facilitates easy removal of elements for swift material changeovers, optimizing operational convenience.