PTFE o ring

High-performance PTFE o rings for chemical & temperature-resistant sealing – by National Fluoromers

PTFE O Rings
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technical specifications
Property Value
MaterialVirgin PTFE, Glass-filled PTFE, Carbon PTFE
Cross section (thickness)5 mm to 25 mm
Inner diameter (ID)1 mm to 500 mm (custom sizes available)
Operating temperature–200°C to +260°C

National Fluoromers is a trusted manufacturer, supplier, and exporter of PTFE O Rings, engineered for reliable sealing in extreme chemical, pressure, and thermal environments. These O Rings are precision-machined or molded from virgin or filled PTFE, offering long-lasting, leak-proof performance in both static and dynamic sealing applications.

PTFE O Rings are widely used where conventional rubber O Rings fail—such as in aggressive chemical media, high-temperature processing, or cleanroom systems.

what is a PTFE o ring?

A PTFE O Ring is a circular sealing element with a round cross-section, made from polytetrafluoroethylene. Unlike elastomer O Rings, PTFE O Rings are rigid, chemically inert, and do not degrade or swell when exposed to solvents, acids, or high heat. They are often used in static sealing (flanges, enclosures) or slow-moving dynamic systems (shafts, pistons) where high purity, zero contamination, and long-term sealing are required.

key features
  • Superior chemical resistance: Unaffected by most acids, alkalis, oils, and solvents.
  • High thermal stability: Operates from –200°C to +260°C without deformation.
  • Low friction & self-lubricating: Ideal for dynamic sealing without lubrication
  • FDA-grade material available: Suitable for food, beverage, and pharmaceutical applications.
  • Non-stick, non-aging: Resistant to wear, moisture, UV, and creep
  • Available in custom & standard sizes: Customer-specific dimensions.
advantages
  • Reliable sealing in aggressive and high-purity environments
  • Does not embrittle, swell, or degrade over time
  • Reduced maintenance and downtime
  • Performs under extreme pressures when combined with backup rings
  • Compatible with a wide range of housings and groove geometries
  • Clean, non-contaminating, and reusable in some applications
applications of PTFE o rings
  • Chemical process equipment sealing
  • Static flange connections in acid or alkali pipelines
  • Dynamic sealing in slow-moving shafts or pistons
  • Valve stem seals and hydraulic systems
  • Food-grade or pharmaceutical vessel gaskets
  • Cleanroom sealing and electronic assemblies
industries we serve
  • Chemical & petrochemical
  • Pharmaceuticals & food processing
  • Semiconductor & cleanroom
  • Oil & gas
  • Pulp & paper
  • Aerospace & defense
  • Water & wastewater
why choose National Fluoromers
  • Precision-machined or molded PTFE O Rings
  • Virgin and filled grades tailored to your media and application
  • Availability of FDA and USP VI compliant materials
  • Fast lead times and international delivery
  • Expert guidance on O Ring groove design and installation
supply options
  • Available as individual pieces or bulk-packed
  • Cut-to-size, molded, or CNC-machined based on quantity and tolerance needs
  • Available in standard metric/inch sizes or custom specifications
  • Clean packaging for critical applications
Looking for PTFE o rings that deliver uncompromised sealing in corrosive, sterile, or high-heat systems? Connect with National Fluoromers – India's dependable source for industrial-grade PTFEsealing solutions.

Share your specifications or standard size – we will supply the perfect seal.

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