Sanitary Food & Pharmaceutical Service Static Mixers
StaMixCo fabricates a wide variety of Medium & High Performance static mixing elements in metal and
plastic construction which are used extensively in the food, pharmaceutical, medical, biotechnology and
related life science industries.
Metal materials of construction are normally 316L S/S for processing typical fluids or Hastelloy C-276 (or PTFE
Teflon®) when operating in highly acidic environments. Metal units are sanitary polished throughout for Clean-in-Place (CIP) and Clean-Out-Of-Place (COOP) operating requirements. Plastic materials of construction are normally Polypropylene or PTFE Teflon®. Sizes range from 1.7 mm (0.067”) diameter to many feet in diameter. Many of our sanitary static mixing units are standard stock items with shipment next day after purchase order to a maximum of 8-weeks for highly specialized custom fabricated equipment
Comparison of Medium & High Performance Static Mixing Elements
The Medium Performance static mixing elements have a characteristic feature of an open geometric structure with minimal intrusion upon the process fluids and exhibit low shear rates and low resistance to flow. . These Medium Performance designs however require long lengths to create a reasonable degree of mixing as shown in Figure #1. They are the most popular design for simple to moderate difficulty applications due to their low pressure drop and open geometric structure. They contain highly polished surfaces suitable for Clean-in-Place (CIP) operations.
The High Performance static mixing elements have the characteristic feature of crossing bars (Type GX) or crossing corrugated plates (Type GV) which create a very high degree of mixing in a short length as shown in Figure #2: Their process performance is excellent, however they exhibit high pressure drops which often necessitates use of larger diameter mixers to minimize the impact of pressure drop. They also have a tendency to foul due to the high surface area per unit volume of their geometric structures and where the many crossing and pinch-points of the structure will cause fibrous materials and deformable solids to hang-up and foul the static mixer. They are suitable for Clean-out-of-Place (COOP) service where Clean-in-Place (CIP) use should be limited to processing clean fluids with no large suspended solids.
As with most process equipment, each design has its advantages and disadvantages where the choice of which design to install is highly dependent on the operating environment and process goals.