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PTFE and CNAF gaskets are high-performance industrial sealing solutions used in chemical processing, oil and gas, petrochemical, steam, and boiler applications.
PTFE gaskets offer excellent chemical resistance, low friction, and reliable performance in high-temperature and corrosive environments. Available in Virgin PTFE, Carbon-Filled PTFE, and Glass-Filled PTFE grades, they are ideal for aggressive media and critical sealing conditions.
CNAF gaskets, manufactured from compressed non-asbestos fibre, are designed for steam, water, and general industrial applications requiring strength, controlled compression, and thermal stability.
As a trusted gasket manufacturer and supplier, we deliver precision PTFE and CNAF gasket solutions for demanding industrial sealing requirements.
Usage of industries
Oil and Gas
Chemical Industry
Power Generation
Mining
Marine
PTFE and CNAF Gaskets
PTFE and CNAF gaskets are high-performance industrial sealing solutions used in chemical processing, oil and gas, petrochemical, steam, and boiler applications.
PTFE gaskets offer excellent chemical resistance, low friction, and reliable performance in high-temperature and corrosive environments. Available in Virgin PTFE, Carbon-Filled PTFE, and Glass-Filled PTFE grades, they are ideal for aggressive media and critical sealing conditions.
CNAF gaskets, manufactured from compressed non-asbestos fibre, are designed for steam, water, and general industrial applications requiring strength, controlled compression, and thermal stability.
As a trusted gasket manufacturer and supplier, we deliver precision PTFE and CNAF gasket solutions for demanding industrial sealing requirements.
Usage of industries
Oil and Gas
Chemical Industry
Power Generation
Mining
Marine
Request A Quote
By submitting this form, you agree to the privacy policy and terms of use.
PTFE and CNAF Gasket Types
At Asian Sealing Products, we manufacture and supply a wide range of PTFE and CNAF gaskets designed for high-pressure, high-temperature, and corrosive industrial environments. Our product range includes Industrial Grade PTFE Gaskets, Corrosion Resistant PTFE Gaskets, General CNAF Non-Asbestos Fibre Gaskets, Reinforced Graphite Gaskets, and Expanded PTFE ePTFE Gaskets.
Each gasket type is engineered to deliver reliable sealing performance, chemical resistance, thermal stability, and long service life across applications in chemical processing, oil and gas, petrochemical plants, power generation, and general industrial systems. All products are manufactured to meet international sealing standards for leak describing performance and operational safety in critical flange connections.
At Asian Sealing Products, we manufacture and supply a wide range of PTFE and CNAF gaskets designed for high-pressure, high-temperature, and corrosive industrial environments. Our product range includes Industrial Grade PTFE Gaskets, Corrosion Resistant PTFE Gaskets, General CNAF Non-Asbestos Fibre Gaskets, Reinforced Graphite Gaskets, and Expanded PTFE ePTFE Gaskets.
Each gasket type is engineered to deliver reliable sealing performance, chemical resistance, thermal stability, and long service life across applications in chemical processing, oil and gas, petrochemical plants, power generation, and general industrial systems. All products are manufactured to meet international sealing standards for leak describing performance and operational safety in critical flange connections.
ReinforCedGraphite
Gasket Reinforcements
General Compressed
Non-Asbestos Fibre
Your Trusted Partner for Reliable Sealing Solutions
Superior Chemical Resistance
Our PTFE gaskets provide outstanding resistance to acids, solvents, alkalis, and corrosive fluids, making them ideal for chemical processing, petrochemical plants, and aggressive industrial environments.
Wide Temperature Range
PTFE and CNAF gaskets perform reliably across a broad temperature range from -200°C to +260°C, ensuring stable sealing in both cryogenic and high-temperature applications.
Low Friction and Non Stick Surface
PTFE gaskets feature a naturally smooth, low-friction surface that reduces wear, prevents media build-up, and extends equipment life in chemical lines, water systems, and processing units.
FDA-Approved for Sensitive Use
We offer FDA compliant PTFE gaskets suitable for food processing, beverage production, and pharmaceutical industries, ensuring contamination free and non asbestos safe sealing performance.
PTFE and CNAF Gasket Applications
Asian Sealing Products manufactures PTFE gaskets and CNAF gaskets for demanding industrial applications. PTFE gaskets deliver high chemical resistance and thermal stability for use in chemical plants, food and pharmaceutical processing, and critical process systems. CNAF gaskets provide durable, high-pressure sealing for boilers, refineries, marine systems, steam lines, and general industrial operations, ensuring operational safety and long-term performance.
Asian Sealing Products manufactures PTFE gaskets and CNAF gaskets for demanding industrial applications. PTFE gaskets deliver high chemical resistance and thermal stability for use in chemical plants, food and pharmaceutical processing, and critical process systems. CNAF gaskets provide durable, high-pressure sealing for boilers, refineries, marine systems, steam lines, and general industrial operations, ensuring operational safety and long-term performance.
Pharmaceutical
- PTFE gasket provides high-purity sealing for medical devices and drug production.
Petrochemical Resilience
- PTFE gaskets are used in pipelines and chemical storage for leak-proof sealing.
Food and Beverage Prowess
- Using PTFE gaskets in these industries ensures contamination-free processing with FDA-compliant materials.
Aerospace Precision
- A PTFE gasket enhances durability in fuel systems and engine components.
Oil and gas industries
- CNAF gaskets provide reliable sealing in pipelines, refineries, and offshore platforms.
Boilers, pipelines, and heat exchangers
- CNAF gasket ensures heat and pressure resistance for uninterrupted operation.
Marine and shipbuilding
- Using CNAF gaskets prevents leaks in water, fuel, and hydraulic systems.
Mining and heavy machinery
- Non-asbestos Gaskets offers strong sealing solutions for extreme operational environments.
PTFE and CNAF Gasket Materials
PTFE and CNAF gaskets are manufactured using various materials based on the application’s requirements. The material selection depends on factors such as the type of fluids being sealed, operating conditions (including temperature and pressure), and the overall environment. Here are some common materials used for manufacturing PTFE and CNAF gaskets:
Ring gaskets are manufactured using various materials based on the application’s requirements. The material selection depends on factors such as the type of fluids being sealed, operating conditions (including temperature and pressure), and the overall environment. Here are some common materials used for manufacturing ring gaskets:
Natural Rubber
Natural Rubber offers excellent flexibility and sealing for low-temperature applications, performing reliably up to 80°C.
Neoprene Rubber
Neoprene provides good resistance to oils, weathering, and moderate chemicals, suitable for applications up to 100°C.
Silicone Rubber
Silicone delivers superior heat resistance and stability, making it ideal for high-temperature sealing up to 215°C.
EPDM Rubber
EPDM offers outstanding resistance to steam, water, and weathering, functioning effectively up to 148°C.
Butyl Rubber
Butyl rubber features low gas permeability and strong chemical resistance, supporting applications up to 100°C.
Nitrile Rubber (NBR)
NBR is well-suited for oil, fuel, and hydrocarbon sealing, with a maximum temperature tolerance of 105°C.
Viton Rubber
Viton provides exceptional resistance to chemicals, solvents, and high temperatures, operating safely up to 204°C.
SBR Rubber
SBR rubber delivers good abrasion resistance and durability for general-purpose sealing in moderate-temperature environments.
Aramid fibres
Provide high strength, heat resistance, and durability, forming the core reinforcement of CNAF gaskets.
Mineral fibres
Enhance thermal stability and pressure resistance for reliable sealing in harsh industrial conditions.
Inorganic fillers
Improve density, compressibility, and performance under high temperature and chemical exposure.
Elastomeric binders
Act as the bonding agent, ensuring flexibility, sealing integrity, and structural cohesion in CNAF gasket sheets.
Product Details
PTFE Gasket Types and Their Properties
PTFE Gasket solutions are designed for high-performance industrial applications that require chemical resistance, temperature stability, and pressure endurance. This PTFE gasket is manufactured in Virgin PTFE, Carbon-Filled PTFE, and Glass-Filled PTFE grades and offers low creep, high dielectric properties, and long service life across a wide range of operating conditions.
Raised-Face PTFE Gaskets
These PTFE Gaskets are designed to be used in high-pressure flange joints (high-pressure) where uniform distribution of loads is necessary, and leak-free sealing is required.
Full-Face PTFE Gaskets
These PTFE Gaskets are used on flat-face flanges, and they cover the whole surface of the flange, eliminate flange damage, and offer uniform chemical resistance.
Custom PTFE Gaskets
PTFE gasket solutions for non-standard flanges and equipment are manufactured in custom-cut forms to meet specific mechanical and sealing requirements.
PTFE Envelope Gaskets
This PTFE gasket combines a compressible core with chemical protection, making the gasket suitable for aggressive media under moderate pressure and temperature conditions.
Expanded PTFE Gaskets (ePTFE)
The ePTFE Gaskets have a micro-fibrous design that provides high compressibility, low creep, and reliable sealing of irregular or damaged flanges, with temperatures ranging between -200 °C and 260 °C.
CNAF Gasket Types and Their Properties
The CNAF Gaskets (Compressed Non-Asbestos Fibre Gaskets) are applied in tight compressibility as well as cost-efficient sealing. These non-asbestos gaskets are made using aramid fibres, glass fibres, and elastomeric binders to ensure a good service in thermal and pressure-based systems.
Aramid Fibre with NBR Binder
Applicable in the oil, fuel, and hydrocarbon services, it provides stability and consistency in sealing under pressure.
Glass Fibre with NBR Binder
A cost-effective CNAF Gasket solution with good compression recovery in a moderate temperature and pressure environment.
SBR/NR Binder CNAF Gaskets
Applicable best when flexibility and low installation cost are needed, and steam, water, and boiler sealing are required.
Reinforced Graphite Gaskets
Graphite gaskets are reinforced with a view to dealing with harsh pressure and temperature conditions. They are designed using expanded graphite, reinforced with stainless steel inserts; they are very chemically resistant and stable in dimensions. These gaskets are typically applied together with PTFE Gaskets and CNAF Gaskets in intricate sealing systems that deal with steam, oil, and chemical processing.
Expanded PTFE Materials
PTFE Gaskets are often paired with elastomer-backed systems depending on application needs:
- Natural Rubber – High elasticity for dynamic sealing
- Neoprene Rubber – Resistant to oil and weathering
- Silicone Rubber – Stable at high and low temperatures, food-grade compatible
- EPDM Rubber – Ideal for water, steam, and outdoor use
- Butyl Rubber – Excellent gas impermeability
- Nitrile Rubber (NBR) – Strong oil and fuel resistance
- Viton Rubber – Premium chemical and heat resistance
- SBR Rubber – Cost-effective for general-purpose sealing
Why Choose Us?
Our product specialises in precision-engineered PTFE Gaskets that are used in critical sealing applications in chemical, petrochemical, oil and gas, boiler, and flange systems. Also included in our solutions are PTFE and CNAF Gaskets, which provide reliable sealing in high-pressure and high-temperature as well as chemically hostile conditions, where PTFE gasket performance is critical.
High-tech Material Expertise
Virgin PTFE, Carbon-Filled PTFE, Glass-Filled PTFE, and Expanded PTFE (ePTFE Gaskets) are used to produce our PTFE Gaskets with low creep, good dielectric properties, and high chemical resistance. Complementary Non-Asbestos Gaskets are CNAF sheet material that is guaranteed to provide controlled compressibility where needed for specific PTFE gasket applications.
Designed to Operate in Extreme Conditions
PTFE Gaskets are used in sealing systems that require high temperatures, cryogenic, and in food and pharmaceutical systems that are FDA-compliant. CNAF Gaskets give steady sealing to water and steam, oil, and boiler use where control of pressure is vital.
Industrial Focus
We have the ability to supply the petrochemical sealing, oil and gas gaskets, high-pressure flange gaskets, and chemical processing units. High-Pressure Non-Asbestos Gaskets come in at a price that fits in cost-conscious, but demanding, environments.
Self-managed Gasket Choice Support
A gasket selection guide is organized to assist in identifying when to apply PTFE Gaskets or CNAF Gaskets and provides a guideline to the maximum temperature, media compatibility, and pressure levels.
Quality, Consistency, and Reach
Our PTFE Gaskets and CNAF Gaskets are manufactured in accordance with ISO standards. They will provide consistent quality, traceability, and reliable supply with an established network of gasket manufacturers and distributors.
Specifications
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 vs CNAF Gaskets
| Feature | PTFE Gaskets | CNAF Gaskets |
|---|---|---|
| Material | Polytetrafluoroethylene | Compressed Non-Asbestos Fiber (Aramid, Glass, etc.) |
| Temperature Range | -200°C to +260°C (-328°F to +500°F) | Up to +400°C (typically +350°C / +662°F) |
| Chemical Resistance | Excellent (highly resistant to most chemicals and corrosive fluids) | Good (resistant to oils, fuels, gases, and some chemicals) |
| Pressure Resistance | Moderate to High (depending on type and design) | High (especially in reinforced types) |
| Flexibility & Conformability | Good to Excellent (especially expanded PTFE) | Good |
| Friction Coefficient | Very Low (non-stick properties) | Moderate |
| Applications | Pharmaceutical, chemical processing, food & beverage, aerospace, electrical insulation | Oil & gas, boilers, pipelines, heat exchangers, marine, mining, general industrial |
| Cost | Generally Higher | Generally Lower |
| FDA Compliance | Available for food and pharmaceutical applications | Not typically FDA compliant |
| Electrical Properties | Excellent dielectric properties | Poor Dielectric Properties |
| Mechanical Strength | Moderate, enhanced with fillers | High tensile strength and durability |
| Creep Resistance | Expanded PTFE has excellent creep resistance | Good |
Rubber Types Used in PTFE and CNAF Gaskets
| Rubber Type | Shore Hardness | Max Operating Temperature |
|---|---|---|
| Natural Rubber | 50° – 80° Shore D | 80°C |
| Neoprene Rubber | 50° – 80° Shore D | 100°C |
| Silicone Rubber | 50° – 80° Shore D | 215°C |
| EPDM Rubber | 50° – 80° Shore D | 148°C |
| Butyl Rubber | 50° – 80° Shore D | 100°C |
| Nitrile Rubber (NBR) | 50° – 80° Shore D | 105°C |
| Viton Rubber | 50° – 80° Shore D | 204°C |
| SBR Rubber | 50° – 80° Shore D | 100°C |
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Answers to all your possible questions.
What applications are PTFE and CNAF gaskets suitable for?
PTFE gaskets are suitable for chemical processing, petrochemical plants, oil and gas pipelines, food and pharmaceutical industries, and high-temperature or corrosive environments. CNAF gaskets are commonly used in steam lines, boilers, water systems, compressors, and general industrial sealing applications where mechanical strength and controlled compression are required.
What is cold flow and how does it affect PTFE gaskets?
Cold flow, also known as creep, is the tendency of PTFE material to deform gradually under constant load. In flange applications, this may reduce sealing stress over time. Using filled PTFE grades, such as glass- or carbon-filled PTFE, helps minimize cold flow and improve long-term sealing reliability.
. What is the difference between PTFE and CNAF gaskets in industrial applications?
PTFE gaskets offer superior chemical resistance and perform well in extreme temperatures, making them ideal for corrosive environments. CNAF gaskets are better suited for steam, water, and oil applications where strength, durability, and controlled compression are required.
What temperature range can PTFE gaskets withstand?
PTFE gaskets typically operate within a temperature range of -200°C to +260°C, making them suitable for both cryogenic and high-temperature industrial applications.
Are PTFE gaskets FDA approved?
Yes, selected grades of PTFE gaskets are FDA-compliant and safe for use in food processing, beverage production, and pharmaceutical manufacturing where contamination-free sealing is required.
Are CNAF gaskets asbestos-free?
Yes, CNAF stands for Compressed Non-Asbestos Fibre. These gaskets are manufactured using aramid fibres and elastomers, providing safe and environmentally compliant sealing solutions.
Which gasket is better for chemical applications?
PTFE gaskets are generally better for chemical applications because of their excellent resistance to corrosive media, acids, and solvents.
Do you supply custom-sized PTFE and CNAF gaskets?
Yes, PTFE and CNAF gaskets can be manufactured in custom sizes and flange standards to meet specific industrial sealing requirements.
How do I choose the right gasket thickness?
The correct gasket thickness depends on flange condition, pressure rating, bolt load, and operating temperature. Thinner gaskets are preferred for high-pressure systems, while slightly thicker gaskets may compensate for minor flange imperfections. Proper engineering evaluation ensures optimal sealing performance.
What media are PTFE and CNAF gaskets not suitable for?
PTFE gaskets are generally not recommended for molten alkali metals or certain fluorinating agents at high temperatures. CNAF gaskets may not be suitable for highly aggressive acids or extreme chemical environments where pure PTFE offers better resistance. Always verify chemical compatibility before selection.
Are you a PTFE and CNAF gasket manufacturer in India?
Yes, we are a leading PTFE and CNAF gasket manufacturer in India, supplying precision-cut industrial gaskets as per ASME, DIN, and IS standards for domestic and international projects.
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