Product Profile:

A manufacturer of rotary airlock equipment uses large floating seals made from Fluorosint® 500 in aluminum housings. The seals travel freely due to the minimal thermal expansion of Fluorosint® 500 over the -200F (- 130C) to 450F (230C) operating range. The seals show no signs of deformation, even under lengthy exposure to differential pressure at elevated temperatures. Seals made of Fluorosint® 500 improve airlock efficiency by reducing seal leakage and motor load. They reduce maintenance and replacement costs by extending part life and produce no measurable wear against mating steel components. (Prior material: Carbon and Graphite-filled PTFE)

• Chemical resistance parallels PTFE
• Continuous use temperatures to 500F (260C)
• Compared to PTFE:
  • higher load carrying capability
  • 1/9 of the deformation under load
  • lower coefficient of thermal expansion

Fluorosint's unique properties are the result of a proprietary process in which synthetically manufactured mica is chemically linked to 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® 500
Fluorosint^® 500 has nine times greater resistance to deformation under load than unfilled PTFE (see Figure 19). Its coefficient of linear thermal expansion approaches the expansion rate of aluminum, and is 1/5 that of PTFE -- often eliminating fit and clearance problems (see Figure 20). It is 1/3 harder than PTFE, has better wear characteristics and maintains low frictional properties. Fluorosint^® 500 is also non-abrasive to most mating materials.

Fluorosint® 207
Fluorosint^® 207's unmatched dimensional stability, excellent creep resistance and white color uniquely position this material to serve FDA regulated applications. It is non-permeable in steam and complies with the FDA's regulation 21 CFR 175.300. Its relative wear rate is 1/20 the rate of PTFE below 300F (150C) making it an excellent choice for aggressive service bearings and bushings.

Figure 19 Click to Enlarge

Figure 20 Click to Enlarge

Labyrinth Seals and Shrouds Abradable seals in turbomachinery fabricated from Fluorosint® 500 tubular bar reliably perform in hostile chemical environments while providing dramatic efficiency gains. (Prior materials: Aluminum, Bronze, Babbit)
Dishwasher Arm Bearing These bearings made of Fluorosint ® 207 offer a 20 year service life, and FDA compliance. (Prior material PTFE)
Transmission and Power Steering Seal Rings Europe's premier automobile manufacturers choose Fluorosint® 500 over other filled PTFE for improved performance and service life capabilities. (Prior material: GF PTFE)
Valve Seats Seats fabricated from Fluorosint® 207 excel in steam and hot air service due to their non-permeability, excellent dimensional stability, and low wear rate. (Prior materials: PTFE, Filled PTFE)
Engineering Notes Due to its PTFE matrix, Fluorosint's physical strength characteristics are not as high as other advanced engineering plastics profiled in this guide (i.e., Ketron® PEEK, Torlon* PAI)

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