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Asian Sealing Products is a trusted manufacturer and supplier of PTFE gaskets and CNAF gaskets engineered for demanding industrial operations. Our sealing solutions are known for their precision engineering, durability, chemical resistance, and leak-proof performance, making them ideal for critical applications across multiple industries.
Our PTFE gaskets are widely used for extreme chemical, thermal, and pressure environments. Known for their non-stick surface, low friction, and excellent resistance to corrosive media, PTFE gaskets deliver long-lasting sealing even under harsh operating conditions.
CNAF gaskets are engineered with aramid fibres and elastomers, offering a safe, asbestos-free alternative for high-pressure, high-temperature sealing.
Usage of industries
Oil and Gas
Chemical Industry
Power Generation
Mining
Marine
PTFE and CNAF Gaskets
Asian Sealing Products is a trusted manufacturer and supplier of PTFE gaskets and CNAF gaskets engineered for demanding industrial operations. Our sealing solutions are known for their precision engineering, durability, chemical resistance, and leak-proof performance, making them ideal for critical applications across multiple industries.
Our PTFE gaskets are widely used for extreme chemical, thermal, and pressure environments. Known for their non-stick surface, low friction, and excellent resistance to corrosive media, PTFE gaskets deliver long-lasting sealing even under harsh operating conditions.
CNAF gaskets are engineered with aramid fibres and elastomers, offering a safe, asbestos-free alternative for high-pressure, high-temperature sealing.
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 supply a comprehensive range of high-performance industrial gaskets engineered to withstand demanding chemical, thermal, and high-pressure environments. Our product lineup 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 is manufactured to meet international sealing standards, ensuring superior durability, operational safety, and reliable leak-proof performance in critical industrial applications.
At Asian Sealing Products, we supply a comprehensive range of high-performance industrial gaskets engineered to withstand demanding chemical, thermal, and high-pressure environments. Our product lineup 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 is manufactured to meet international sealing standards, ensuring superior durability, operational safety, and reliable leak-proof performance in critical industrial applications.
ReinforCedGraphite
Gasket Reinforcements
General Compressed
Non-Asbestos Fibre
Your Trusted Partner for Reliable Sealing Solutions
Chemical Resistance
The PTFE gaskets are highly resistant to acids, solvents, and corrosive fluids; therefore, they are the best chemical-resistant gasket in the industrial, petrochemical, and process gasket.
Wide Temperature Tolerance
PTFE and CNAF gaskets are durable depending on the sealing temperature, -200degC to +260 °C, which is effective in cryogenic and high-temperature sealing systems.
Non-Stick & Low Friction
The PTFE gaskets have a natural, smooth, low-friction surface that minimizes wear, accumulation, and promotes the life of equipment in chemical and water-line sealing.
FDA-Approved for Sensitive Use
Our FDA-based PTFE gaskets are safe, contamination-free, and are relied upon to provide safe, non-asbestos-contaminated seals in the processing of food, beverages, and pharmaceutical products.
PTFE and CNAF Gasket Applications
Asian Sealing Products produces PTFE and CNAF gaskets that are designed to be used in highly industrialized applications. The PTFE Gaskets ( Polytetrafluoroethylene Gaskets) provide chemical-resistant, temperature-resistant sealing of food, pharma, and process industries. CNAF gaskets (Compressed Non-Asbestos Fibre Gaskets) are durable high-pressure gaskets, which are used in boilers, refineries, and marine systems- making sure of safety, purity, and efficient performance.
Asian Sealing Products produces PTFE and CNAF gaskets that are designed to be used in highly industrialized applications. The PTFE Gaskets ( Polytetrafluoroethylene Gaskets) provide chemical-resistant, temperature-resistant sealing of food, pharma, and process industries. CNAF gaskets (Compressed Non-Asbestos Fibre Gaskets) are durable high-pressure gaskets, which are used in boilers, refineries, and marine systems- making sure of safety, purity, and efficient 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
Our PTFE Gaskets ( Polytetrafluoroethylene Gaskets) are designed to withstand a variety of industrial sealing needs at Asian Sealing Products, such as chemical-resistant pipelines, high pressure, and cryogenic applications. All types of gaskets are precisely designed, compatible, durable, and safe to operate in diverse operating conditions.
Raised-Face Gaskets
These gaskets are compatible with high-pressure sealing and leak-free in a high-pressure environment with raised-face flanges, which provide high compression strength and high sealing performance. The flange face has the same diameter as the outer one, which ensures uniform distribution of the load during any critical operation.
Full-Face Gaskets:
These gaskets are designed to fit flat-face flanges and are designed to cover the complete surface, including the holes in the bolts. They offer a smooth surface, do not distort flanges, and are a perfect fit where a non-distorted surface and chemical resistance are required.
Customized Gasket Types:
We produce tailored PTFE gaskets to fit non-standard flanges, equipment, or sealing geometries. These gaskets are engineered to meet the specific industrial and mechanical requirements since they are made in virgin, carbon-filled, or glass-filled PTFE.
Envelope Gaskets:
These gaskets are composed of a PTFE envelope with a strong core (rubber, CNAF, or graphite) and offer flexibility as well as chemical protection. They are suitable for all processes that involve acids, solvents, and aggressive fluids, which provide good sealing in the moderate conditions of temperature and pressure.
Expanded PTFE Gaskets (ePTFE):
These gaskets are made of expanded PTFE with a micro-fibrous structure to provide excellent compressibility, low creep, and dielectric properties. The fact that they can be sealed with a high degree of security even on irregular or damaged flanges, and have a high degree of chemical resistance and a temperature range between -200 °C and 260 °C.
CNAF Gasket Types and Their Properties
Asian Sealing Products also has a variety of CNAF (Compressed Non-Asbestos Fibre) gaskets, which are designed to be used in heat, pressure, and in the presence of chemicals. These non-asbestos gaskets are made using sheets of aramid fibre and glass fibre and high-technology elastomeric binders to ensure uniform sealing strength through the many industrial applications.
Aramid Fibre with NBR Binder
This grade, which is designed to resist oil, fuel, and hydrocarbons, provides stability and durability of internal combustion engines and high-pressure sealing systems. It comes as sheets or precision-cut gaskets, and is finished on both sides with a 3xA anti-stick coating to be removed easily and offer a long service life.
Glass Fiber with NBR Binder
This variant is economical and reliable, with the addition of structural integrity and general industrial and chemical-resistant applications. It is highly bonded, providing it with good compression recovery to provide secure sealing under moderate temperature and pressure conditions.
SBR/NR Binder Fibre Aramid with SBR.
A water-safe, air-safe, and non-aggressive fluid-controlled swell high premium material. It provides moderate oil resistance, high flex, and low cost of installation, and is suitable for steam lines, boilers, and low-pressure industrial sealing processes.
Reinforced Graphite Gaskets
Reinforced Graphite Gaskets are produced through the integration of a combination of expanded graphite along with tanged stainless steel in order to provide high strength and stability when subjected to severe pressure and temperature. The reinforcement eliminates gasket hardening, which guarantees a long life and similar sealing behavior.
These gaskets are very good in terms of chemical resistance and application in steam, oil, and chemical processing. Ordinary reinforcement grades are SS 304 and SS 316 to ensure higher durability.
They are often used alongside PTFE and CNAF gaskets in complex sealing systems, making them a dependable solution for high-pressure non-asbestos and chemical-resistant environments.
Expanded PTFE Materials
- Natural Rubber:
Offers excellent tensile strength and flexibility, making it ideal for dynamic gasket applications where elasticity is required. - Neoprene Rubber:
Known for its resistance to oil, weathering, and moderate chemicals, a popular choice for HVAC and refrigeration systems. - Silicone Rubber:
Exceptional thermal stability and flexibility at both high and low temperatures; perfect for food-grade and medical applications. - EPDM Rubber:
Resistant to weather, ozone, and steam; widely used in water and outdoor sealing applications. - Butyl Rubber:
Excellent impermeability to gases and chemicals; suitable for vacuum sealing and chemical-resistant gaskets. - Nitrile Rubber (NBR):
Best known for oil and fuel resistance, ideal for automotive and industrial fluid-handling applications. - Viton Rubber:
Premium fluorocarbon rubber offering excellent resistance to aggressive chemicals and high temperatures. - SBR Rubber:
Cost-effective synthetic rubber with good abrasion resistance; commonly used in general-purpose gasket applications.
Why Choose Us?
At Asian Sealing Products, we specialize in precision-engineered PTFE and CNAF gaskets designed for dependable performance across critical industries. Our PTFE gaskets (Polytetrafluoroethylene gaskets) and CNAF gaskets (compressed non-asbestos fibre gaskets) are high-quality gaskets and are used in high-temperature sealing, cryogenic applications, and FDA-compliant applications.
As a trusted PTFE gasket supplier and CNAF gasket manufacturer, we provide tailored solutions for every industrial sealing requirement.
1. High-tech Material Choice
Our gaskets are manufactured with Virgin PTFE and Carbon-Filled PTFE and CNAF Sheet Material, providing the best chemical resistance, low creep, and uniform gasket material.
2. Engineered for Performance
Our PTFE gaskets can be found in high-temperature to cryogenic sealing, offering durability and dielectric properties, and CNAF gaskets can be used to provide stability in the face of water, steam, and oil.
3. Industry-Specific Solutions
We are the distributor of sealant products to petrochemical, oil and gas, boiler, and flange gasket systems, all of which are capable of operating under difficult conditions.
4. Professional Advising and Recruiting
A detailed gasket selection guide assists our specialists in advising customers on when to utilize CNAF, the maximum temperature of PTFE gaskets, and the appropriate material.
5. Stamped Quality and Internationalization
We are ISO ISO-certified gasket manufacturer and exporter that guarantees accuracy, traceability, and quick delivery through our global CNAF gasket distributor network.
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 ideal for highly corrosive chemicals, acids, solvents, and aggressive media. They perform well in pharma, chemical processing, food & beverage, and semiconductor industries.
CNAF gaskets are used in steam lines, oil & gas, petrochemical plants, pipelines, compressors, and general industrial sealing where moderate temperature and pressure resistance is required.
How do PTFE and CNAF gaskets differ in performance?
- PTFE: Excellent chemical resistance, low friction, non-contaminating, withstands temperatures up to ~260°C but not suited for high pressure.
- CNAF: Higher pressure capability, good for steam and hydrocarbon service, temperature resistance up to ~400°C depending on grade, but limited chemical compatibility compared to PTFE.
What standards or certifications do these gaskets comply with?
Depending on manufacturer and grade, PTFE and CNAF gaskets may comply with:
- ASME B16.21 / B16.5
- EN 1514 / EN 12560
- ASTM F36, F37, F38
- FDA compliance (PTFE grades)
Always check the specific datasheet for certification details.
How do I choose the right gasket thickness?
Gasket thickness depends on:
- Flange surface condition
- Operating pressure and temperature
- Desired compressibility
What is "cold flow" and how does it affect PTFE gaskets?
Cold flow (also known as creep) is the permanent deformation of PTFE material when subjected to a constant compressive load, particularly at elevated temperatures. Because PTFE is a thermoplastic, it tends to squeeze out from between the flange faces, leading to a loss of bolt load and, eventually, a leak.
Mitigation: This is largely solved by using filled PTFE grades (e.g., glass, carbon, silica fillers) or structured PTFE (e.g., ePTFE), which significantly improve creep resistance.
Can CNAF gaskets be used on damaged or warped flanges?
CNAF gaskets are highly conformable and can seal on minor imperfections better than rigid materials like PTFE or metal gaskets. Their inherent resilience allows them to compensate for slight flange separation or warpage during temperature cycling. However, severe damage requires flange repair for optimal sealing integrity.
What media are PTFE and CNAF not suitable for?
- PTFE: Generally compatible with all media but not ideal for molten alkali metals and fluorine at high temperatures.
- CNAF: Not recommended for strong oxidizing acids, concentrated alkalis, or aggressive chemicals.
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