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Engineering Notebook: Fluorosint

In this Insight Blog we are transcribing handwritten notes taken over the years working with plastics, the notebook did not site all references so we cannot give credit to where it is due. Machinists took the time to write down knowledge gained and learned, we feel it should be put to use and hopefully help someone reading this to learn from it. All materials have inherent limitations that must be considered when designing parts. To make limitations clear, each material profiled in these engineering notes are dedicated to identifying these attributes. We hope these insights about material strengths and weakness simplifies your selection process.


Engineering Notes: Fluorosint


Is a proprietary mixture in which synthetically manufactured mica is chemically linked to Polytetrafluoroethylene (PTFE). This bonding results in properties not normally attainable in reinforced PTFE. Fluorosint ® grades offer an excellent combination of low frictional properties and dimensional stability. Fluorosint ® offers superior chemical resistance and continuous use temperature of 500°F (260 °C). Compared with PTFE, it has higher load carrying capability, 1/9 of the deformation under load, and a lower coefficient of thermal expansion. Fluorosint® material has been developed to excel in specific bearing and seal applications.


Known applications:

  • Control and shut-off valves

  • Plunger pumps

  • Metering systems

  • Agitators

  • Hydraulic Cylinders

  • Rotary joints

  • Spindles


Fluorosint 207 material has a food contact compliant composition which, in combination with the good mechanical performance, dimensional stability, sliding and wear properties and inherent outstanding chemical and hydrolysis resistance of Fluorosint, opens numerous application possibilities in food, pharmaceutical and chemical processing industries. Fluorosint 207 lasts far longer than unfilled PTFE in wear applications and has a very low coefficient of

friction. It is a preferred material for lower pressure seats and seals where virgin PTFE fails and food contact compliance may be required.


Known applications:

  • Seals

  • Mixers

  • Pumps

  • Appliances

  • Bearings

  • Valve seats

  • Beverage filling systems


Fluorosint 500 material is reinforced with a proprietary synthetic mica, this exhibits an addition to its inherent outstanding chemical and hydrolysis resistance with good mechanical and tribological properties. Fluorosint 500 has 9 times greater resistance to deformation under load than unfilled PTFE. Its coefficient of linear thermal expansion approaches the expansion rate of aluminum and is 1/4 that of virgin PTFE, often eliminating fit and clearance problems. It is considerably harder than virgin PTFE, better wear characteristics and maintains low frictional properties. Fluorosint 500 enhanced PTFE offers an ideal combination of stability and wear resistance for sealing applications where tight dimensional control is required.


Known applications:

  • Split and one piece seals

  • Valve seats

  • Shrouds (Compressors)

  • Slide Bearings

  • Wear Strips

  • Sacrificial, abraded seals

  • Thrust washers


Fluorosint MT-01 material is for extreme service seals and wear parts with high mechanical performance at elevated temperatures where strength, resistance to deformation and dimensional stability are critical.


Known applications:

  • High temperature seals

  • Linear guides

  • Wear bands

  • Ovens and dryers

  • Chemical processing equipment


Fluorosint HPV material is for high performance bearings, bushings and seals where higher loads and minimal wear is required. FDA compliant, excellent wear resistance, and excellent bearing performance.


Known applications:

  • Bearings

  • Commercial food equipment

  • Wear guides

  • High performance seals

  • Thrust washers

  • Sausage production equipment


Due to its PTFE matrix, Fluorosint physical strength characteristics are not as high as other advanced engineering plastics (i.e., Ketron® PEEK, Torlon* PAI).


All trademarks and service marks are property of their respective manufactures. All statements, technical information and recommendations contained in this publication are presented in good faith and are, as a rule, based upon tests and such tests are believed to be reliable and practical field experience. The reader, however, is cautioned that Diversified Designs does not guarantee the accuracy or completeness of this information and it is the customer’s responsibility to determine the suitability of any information provided by Diversified Designs in any given application.


#DiversifiedDesigns #Plastics #MachiningPlastics #Porosity #Fluorosint #ChemicalResistant

#Seals #FoodContactCompliant #HydrolysisResistance #WearParts

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