GXR Static Mixer Product Bulletin For Mixing & Dispersing Viscous Fluids………………. INTRODUCTION The GXR Static Mixer (Licensee of Bayer, AG) is used for mixing and dispersing viscous materials. The static mixing elements are inserted into a pipe/housing and have no moving parts. They create mixing by directing the viscous materials to follow the geometric structure of the mixing bars within the static mixing elements that continuously divide and recombine the flow. A very high degree of mixing is achieved in a short length (see Figure #1) with modest pressure drop. Since there are no moving parts, the static mixing unit requires little maintenance. The unit is also virtually indestructible due to its monolithic construction (see Figure #2). The standard configuration is with eight (8) very efficient static mixing elements however fewer or more mixing elements are used based on the process requirements for the specific application. The mixing elements are available in metal and plastic construction (see Figure #3). Figure #3: GXR static mixer assembly with eight (8) mixing elements in metal construction (left) and in 50% Glass Filled Nylon plastic construction (right) Figure #1: Mixing of blue and white epoxy resins. Empty tube (left) provides no mixing. Eight (8) GXR mixing elements (center and right) create a very high degree of mixing in a short length. The metal mixing elements are made of high strength 17-4 PH heat treated stainless steel. They are typically used for the Injection Molding and Extrusion of molten plastics, and for the high and low temperature processing of other viscous polymers and resins such as Liquid Silicone Rubber (LSR), Adhesives, Polyurethanes, Polyol, etc. A key operational advantage of the GXR mixing element structure is they may be safely removed from the housing by pressing on the support ring which avoids any force placed on the less robust mixing element grid structure within the ring. This is a major operating advantage over its sister GX mixer structure (see Figure #4) without a support ring. Figure #4: GX static mixer assembly without support ring. Figure #2: The GXR static mixing elements are extremely strong due to their monolithic cast construction where the mixing bars are joined to each other and to the ring wall via a single molten metal pour (metal mixing element shown above). In plastic construction, they are injection molded with the same monolithic structure. The plastic mixing elements are a cost effective alternative when processing most resins at low to medium temperature. They are made of 50% glass-filled polyamide (Nylon) 66 (PA66) resin which provides very high strength. They are also available in a less robust polypropylene plastic construction. The plastic as well as the metal mixing elements have the same monolithic construction and create a high degree of mixing in a shor

The GXR static mixer is used for the mixing and dispersion of viscous fluids. It efficiently mixes liquids of equal and very different viscosities, of equal and very different volumetric flow ratios, and to the degree of homogeneity required by the specific application. Design of a GXR static mixing unit is based on customer requirements with consideration for flow rate, viscosity, pressure drop, maximum allowable length, and homogeneity required. With the use of Tables #1 and #2, the number of GXR mixing elements required for a specific application may be determined. Table #1: Required Number...

Figure #6: This photograph is a close-up view of Figure #5, Row E. The blue resin is fed in the center of the pipe to the GXR static mixer and is shown at left (INLET TO 1). The remaining photographs show the outlet of each of the 16 GXR mixing elements. GXR Mixing Elements are available in Metal Construction (see Table #3) and in Plastic Construction (see Table #4) Figure #7: Dimensions of eight (8) GXR mixing elements. Figure #8: Complete GXR Mixing Element Assembly inside See also Figure #1 - #6 for visualization. a Housing. Housing designs vary dramatically based on customer Needs (see also...

Table #4: Plastic GXR Mixing Element Key Dimensional Parameters for eight (8) Mixing Elements as shown in Figures #3 (right side)Figure #7 & Figure #11.__ Housings for GXR Mixing Element assemblies vary dramatically based on customer and process requirements including materials of construction, design pressure & temperature and required end-connections (see Figures #8 - #11). If the end user desires to supply their own housing, StaMixCo will assist in presenting options that are available. StaMixCo can also supply the housing to general or detailed specifications. To evaluate the use of a GXR...