Parker’s rotary shaft FlexiSeal™ designs feature either a flanged design (FFC FFS FFN) or an O-ring on the OD to keep the seal fixed in the bore as the shaft rotates. The O-ring can either be centered along the OD (FCC FCS) or located in the heel of the seal (FHC FHS). Virtually any O-ring material can be supplied with a custom rotary FlexiSeal, but a fluorocarbon material is standard.

Performance capabilities of PTFE FlexiSeal rotary shaft seals include:
• Low friction
• Wide temperature range (-450F to +600F)
• Ultra broad chemical compatibility
• Dry running ability in dynamic sealing applications
• Resistance to degradation, heat aging and physical property alteration during temperature cycling (subject to limits of elastomer o-ring)

Spring Options. Rotary FlexiSeal products are available with three different spring designs to energize the jacket.

V-Shaped cantilever springs (V Series) are specified for:
• Rotary shaft speeds <1000 fpm (5 m/s)
• Wide tolerance and misaligned glands
• Abrasive media (when scraper lip is designated
• Dynamic applications to 450°F (230°C)

Canted coil springs (C Series) are specified for:
• Rotary shaft speeds <1000 fpm (5 m/s)
• Wide tolerance and misaligned glands
• Very small diameter and friction critical applications

Helical wound spring (H Series) are specified for:
• Flanged rotary seals
• Static or very slow rotary speeds <50 fpm (0.25 m/s)
• Critical applications requiring high contact force spring load sealing
• Applications <-100°F (-75°C)

Lip Shapes. Rotary FlexiSeal profiles can be optimized for application conditions by matching lip shape to desired performance.
• Chamfered lips maximize sealability while minimizing friction
• Scraper lips prevent particles from accumulating at the lip, making wash-downs more effective

Profile features:
• FCC: O-ring centered in OD. Chamfered ID lip. V Series (FCC-V) or C Series (FCC-C) spring options
• FCS: O-ring centered in OD. Scraper ID lip. V Series (FCS-V) or C Series (FCS-C) spring options.
• FHC: O-ring in heel OD. Chamfered ID lip. V Series (FHC-V) or C Series (FHC-C) spring options
• FHS: O-ring in heel OD. Scraper ID LIp. V Series (FHS-V) or C Series (FHS-C) spring options)
• FFC-C / FFS-C: Flanged heel OD. C-Series spring. Chamfered ID Lip (FFC-C) or Scraper ID lip (FFS-C)
• FFN-H: Flanged heel OD. H Series spring and high radial load ID contact area

Standard PTFE materials include:
• 0203, Fiberglass Filled PTFE
• 0301, Graphite Filled PTFE
• 0502, Carbon Fiber Filled PTFE
• 0601, Aromatic Polyester Filled PTFE
• 0602, PPS/Carbon Filled PTFE

Maximum Shaft Dynamic Runout (TIR), and Maximum (STBM) Misalgnment: Dependent on seal cross-section. Refer to Engineering Section 2, of Catalog EPS5350, Rotary Seal Design Guide. See Product Support Tab for catalog link.

Typical Applications:
Radial applications with extreme conditions that involve lower speeds and higher pressures, including: compressors, cryogenics, FDA clean grade operations, jet engines, hydraulic cylinders, pressure washers, robotics, rotary unions, steering cylinders, vapor recovery systems.