PTFE & CNAF Gaskets

Welcome to Asian Sealing Products, the legend of industrial sealing excellence—our PTFE gaskets. In precision engineering, polytetrafluoroethylene, more commonly identified as PTFE, unequivocally takes the lead in sealing technology. This product page sets forth a comprehensive exploration, uncovering the importance of PTFE gaskets.


Our PTFE gaskets are known for their extravagance, making them essential in various industries. Their outstanding performance shines in major environments like pharmaceuticals, petrochemicals, food and beverage processing, and aerospace. PTFE gaskets protect equipment and streamline operational processes in these sectors. The extraordinary sealing capabilities of PTFE gaskets prevent leakages and contribute significantly to operational efficiency. Their reliability spans various sectors, making PTFE gaskets indispensable for creating secure seals and optimizing performance.

  • Pharmaceutical Excellence: Flourishing within the landscapes of pharmaceutical environments, PTFE gaskets guarantee proper sealing and safeguarding of equipment.
  • Petrochemical Resilience: In the rigorous conditions of petrochemical settings, PTFE gaskets are essential, offering steadfast sealing solutions.
  • Food and Beverage Prowess: Due to rising food and beverage processing demands, these gaskets are pivotal in maintaining impeccable hygienic conditions and optimizing operational processes.
  • Aerospace Precision: Integrated into aerospace machinery, PTFE gaskets play a pivotal role, providing reliable seals to endure and overcome the distinctive challenges of aerospace environments.


Precision is of utmost importance in the process of industrial sealing, and PTFE gaskets meticulously adhere to stringent specifications. From precise dimensions and pressure ratings to exceptional temperature resistance and
chemical compatibility, this section offers a comprehensive exploration of the technical intricacies ensuring the reliability and efficacy of PTFE gaskets.


The carefully selected materials employed in their construction are at the core of PTFE gaskets. Immerse yourself deep in material science as we dive into the eco-friendly, durable elements that collectively contribute to the exceptional properties of PTFE gaskets. Gain insights into how the meticulous choice of materials enhances chemical resistance, thermal stability, and overall functionality, setting these gaskets apart in the competitive landscape of industrial applications.

Asian Sealing Products PTFE gaskets represent more than just sealing solutions; they are committed to precision, innovation, and reliability. Whether facing extreme temperatures, high pressures, or corrosive environments, PTFE gaskets shine in adversity. As you navigate the complexities of industrial operations, consider these gaskets as your steadfast allies, elevating your processes to new standards of efficiency and resilience. Connect with us to explore how PTFE gaskets can redefine excellence in your industrial applications.


Look into the expansive spectrum of our PTFE gaskets, precision-engineered to address specific industrial requirements and various applications. Each type is designed precisely and tailored to meet distinct requirements within various sectors. Delve into the intricacies of these PTFE gasket types, each serving a unique purpose:

  • Raised-Face Gaskets:
    These gaskets are engineered with precision and feature a raised surface for optimized sealing in specific industrial applications. Their design ensures enhanced pressure resistance and sealing efficiency.
  • Full-Face Gaskets:
    Tailored for comprehensive sealing, full-face gaskets provide complete coverage, making them ideal for applications requiring a thorough and secure seal. They excel in environments where containment is crucial.
  • Customized Gasket Type: We offer a wide range of customized gaskets that are manufactured using superior quality raw material. These gaskets are available in different sizes, shapes and thicknesses to meet the varied requirements of our customers. Our customized gaskets are used extensively in industrial applications are known for their durability, high performance and low maintenance.
  • Envelope Gaskets:
    Discover the versatility inherent in envelope gaskets, where a robust core material finds protection within a PTFE envelope. This innovative design not only harnesses the advantages of PTFE but also augments strength, rendering it apt for a diverse range of demanding applications.

Every variation of PTFE gasket boasts distinctive characteristics and applications, collectively enhancing the overall versatility of PTFE gaskets. Develop a comprehensive understanding to make informed decisions and choose the most suitable gasket for your industrial needs.

PTFE Gaskets Material Grade Types
Sl.No Grade Filler Content by Weight (%) Properties
1 Virgin PTFE Nil Hygienic.
Excellent Chemical Resistance.
Outstanding electrical properties.
2 Glass filled PTFE 15 – 25 High compressive strength.
Excellent chemical resistance.
Improved wear resistance under load & permanent deformation.
PTFE Gaskets – Requirement of Material Properties
Sl.No Material Shore Hardness Maximum Operating Temperature
1 PTFE (Polytetrafluoroethylene) 50° – 65° Shore D 240°C
2 25% Glass filled PTFE (Polytetrafluoroethylene) 60° – 75° Shore D 240°C
3 25% Carbon filled PTFE (Polytetrafluoroethylene) 60° – 75° Shore D 240°C

PTFE Gaskets Details

  • PTFE is extremely useful as a gasket material, thanks to its almost chemically inert nature
  • Unfortunately, the material has a tendency to creep under load and has limited use in such applications
  • Modified PTFE materials allow the benefits of PTFE to be utilised at higher compressive loads and temperatures
  • For instance, expanding the PTFE produces a softer material with a higher strength
  • The addition of fillers such as silica, silicon carbide or barium sulphate lends the material better hot and cold flow resistance. Hence, the chemical resistance is not negatively affected
  • PTFE can also be used as an envelope instead of a more conventional compressed fibre gasket material insert
  • This combines the chemical resistance of the PTFE with the stress retention and recovery properties of the insert
  • The result? The negative effect of the PTFE on the joint’s mechanical stability is reduced
  • Remarkable chemical resistance
  • Suitable for use with foodstuff and pharmaceutical applications
  • Insoluble in solvents, even at increased temperature
  • Stable to light
  • Does not absorb water
  • Excellent electrical insulating capacity
  • Low thermal conductivity
  • Expanded PTFE materials has excellent creep resistance and bolt torque retention properties
  • This allows PTFE to be used at higher temperatures and to seal higher internal pressures
  • Expanded PTFE tape form with a pressure sensitive adhesive backing strip to assist with installation
  • Since the material is available in roll form it offers a solution to jointing needs without the need to maintain large stocks of cut gaskets
  • Combination rings or transition rings combine two different sizes having the same pitch diameter permitting bolt up of differing size flanges
  • Excellent chemical resistance
  • PTFE envelope gaskets comprise a compressed synthetic fibre gasket material insert with a PTFE envelope
  • The envelope protects the gasket from chemical attacks and provides required strength and resilience for demanding sealing operations
  • PTFE envelope gaskets offer excellent chemical resistance under moderate conditions of temperature and pressure
  • Non-asbestos Gaskets is made of high quality non-asbestos fabric and synthetic rubber
  • Non-asbestos Gaskets sealing ability is exceptional and safe against oil
  • Suitable alternative for asbestos
Compressed Non Asbestos Fibre Gaskets – Requirement of Material Properties
Sl.No Material Shore Hardness Maximum Operating Temperature
1 Natural Rubber 50° – 80° Shore D 80°C
2 Neoprene Rubber 50° – 80° Shore D 100°C
3 Silicone Rubber 50° – 80° Shore D 215°C
4 EPDM Rubber
(Ethlylene Propylene Diene Monomer)
50° – 80° Shore D 148°C
5 Butyl Rubber 50° – 80° Shore D 100°C
6 Nitrile Rubber (NBR) 50° – 80° Shore D 105°C
7 Viton Rubber (Fluorocarbon) 50° – 80° Shore D 204°C
8 SBR Rubber (Styrene butadiene) 50° – 80° Shore D 100°C

Compressed Non-Asbestos Fibre Details

  • Capable of sealing a wide range of industrial applications
  • Easy to handle and install
  • Excellent bolt stress retention properties
  • Remarkable sealing performance
  • Easy to remove due to CNAF’s proprietary anti-stick coating
  • Economical
  • Good resistance to oils, fuels, hydrocarbons
  • Successful in internal combustion engine applications
  • Available in sheet form as cut gaskets
  • 3xA anti-stick finish on both sides
  • Good resistance to oils, fuels, hydrocarbons
  • Fantastic economical option for general industrial services
  • Available in sheet form and as cut gaskets
  • 3xA anti-stick finish on both sides
  • Premium grade, controlled-swell materials
  • Available in sheet form and as cut gaskets
  • 3xA anti-stick finish on both sides
Reinforced Graphite Gaskets

ReinforCedGraphite Gasket Reinforcements

Product Details

  • Wide-spread sealing products
  • Consists of pure carbon in which the crystalline structure has been considerably expanded through special chemical and thermal procedure
  • The expanded crystals are formed into foil by a multi-stage calendaring process
  • Thin flexible graphite foil can then be laminated into thicker sheets to manufacture a range of sealing products
  • Flexible graphite sheet can also be supplied with reinforcing materials to increase the tensile strength, load bearing capacity, and improve handling characteristics
  • Laminated graphite sheet materials are often used as a replacement for asbestos-based materials. Because of their excellent chemical resistance and temperature
  • Graphite laminate materials are ideal for steam applications as they do not contain a rubber binder and are not subjected to hardening of the material
  • Outstanding resistance to high and low temperature
  • Chemically resistant to virtually all media
  • High compressibility
  • Low creep under temperature or pressure
  • Seals gases and liquids effectively at low bolt loadings
  • Unlimited storage life