**AVAILABILITY:  Due to the customized nature of this product, only a sampling of Parker's part numbers are shown.  If the materials and dimensions you need are not shown, assistance with part number configuration may be found in the literature document in the Product Support tab.  

Parker’s FBC-V series FlexiSeal™ is a symmetrical spring-energized PTFE lip seal for rod and piston featuring beveled style lips, and cantilever spring for maximum ID & OD sealing.  FlexiSeal profiles utilize a variety of PTFE jacket profiles, spring types and materials.  PTFE and other machinable high performance materials of construction are used where elastomeric seals fail to meet an application's temperature range, chemical resistance or friction requirements and deliver advantages which 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
• High surface speed

FBC-V series FlexiSeals are precision machined to fit inch/fractional or metric rod and piston glands.   

Standard Materials (seal jacket or body):  
• 0100, Virgin PTFE
• 0102, Modified PTFE
• 0120, Mineral Filled PTFE
• 0127, Mineral Filled PTFE — FDA compliant for rotary applications
• 0128, Mineral Filled PTFE — Antimicrobial
• 0203, Fiberglass Filled PTFE
• 0204, Fiberglass and MoS2 Filled PTFE
• 0301, Graphite Filled PTFE
• 0307, Carbon-Graphite Filled PTFE
• 0405, Stainless Steel Filled PTFE
• 0502, Carbon Fiber Filled PTFE
• 0601, Aromatic Polyester Filled PTFE
• 0615, Proprietary Low Wear PTFE
• 0901, UHMW Polyethylene
• 0913, Hytrel® Unlubricated Thermoplastic Elastomer

Spring materials:  Medium load cantilever springs are available in corrosion-resistant metal alloys, including stainless steel and Elgiloy.

Alternate Materials:  For applications that may require an alternate material, please contact your Parker EPS representative.

Lip Style:  The beveled (or chamfered) ID and OD lip shape allows for ease of installation and permits lubrication to nest under the lip and feed through in reciprocating dynamic applications.  The result is a microscopic film of lubrication that increases seal and hardware service life.  The beveled lip creates a narrow contact footprint which concentrates sealing force on a single point, maximizing sealing ability and minimizing friction.

Pressure Rating:  Standard FlexiSeal designs are rated to 3,000 psi when used in glands conforming to the dimensions supplied in Parker's PTFE Lip Seal Design Guide, Catalog EPS5340, using materials that meet the temperature requirements of the application.  Extended heel radial FlexiSeals are available which increase the pressure rating to 10,000 psi under the same conditions.  

Features of the FBC-V series compared to alternate Parker FlexiSeal profiles:
• Film Breaking Ability:  Very High
• Low Pressure Sealing Ability:  Very Good
• Friction:  Medium
• Contamination Exclusion:  Low
• Good in Abrasive Media:  No
• Available in Mil-G-5514 Glands:  Yes