PTFE gaskets, also known as Teflon gaskets, are sealing components made from polytetrafluoroethylene (PTFE). They are manufactured from PTFE rods, tubes, or sheets through machining, turning, or cutting processes. Available in various designs, including flat gaskets, V-shaped gaskets, piston rings, and ball valve seals, PTFE components offer excellent chemical resistance, aging resistance, and electrical insulation properties.
PTFE provides broad chemical compatibility across a pH range of 0–14, with exceptions including molten alkali metals and fluorine under high-temperature and high-pressure conditions. It maintains useful mechanical properties over a wide temperature range of approximately -180°C to +200°C. The maximum operating pressure can reach 10 MPa, depending on the gasket design, material grade, temperature, and application conditions.
As a clean and chemically inert sealing material, PTFE does not readily contaminate the media it contacts. This makes PTFE gaskets suitable for a wide range of applications, including chemical processing, food production, pharmaceutical equipment, and other industries requiring clean and reliable sealing solutions.
Performance
PTFE gaskets provide reliable sealing performance with excellent chemical resistance and dimensional adaptability. Their firm structure and compressibility allow them to conform to minor surface irregularities, helping fill small cracks, gaps, and imperfections on mating surfaces to reduce leakage.
They are particularly suitable for acid-resistant, alkali-resistant, and corrosive environments, as well as connections involving non-metallic equipment and large-diameter vessels. PTFE gaskets also help protect fragile materials and components during installation by providing an effective sealing interface.
In addition, their adaptability helps compensate for minor dimensional variations caused by manufacturing imperfections, machining tolerances, mechanical deformation, or installation misalignment. They can also help accommodate uneven bolt loading and flange surface irregularities, making them a practical sealing solution for demanding industrial applications.
Available PTFE Materials
JINNAI SEAL offers different PTFE material options to meet various industrial sealing requirements.
Virgin PTFE – Excellent chemical resistance, electrical insulation, and low friction.
Modified PTFE – Enhanced mechanical properties and reduced deformation under suitable operating conditions.
Filled PTFE – Available with fillers such as glass fiber, carbon, or bronze to improve specific properties, depending on the application.
Product Specifications
PTFE gaskets can be manufactured in different sizes and configurations to suit various flange connections and equipment requirements.
Parameter
Description
Material
PTFE, Modified PTFE, Filled PTFE
Color
White or customized according to material grade
Shape
Round, Square, Oval, and Custom Shapes
Thickness
Customized according to drawings
Dimensions
Custom inner diameter and outer diameter
Manufacturing Process
CNC Machining, Cutting, and Turning
Operating Temperature
Depends on PTFE grade and application conditions
Customization Services
JINNAI SEAL provides custom PTFE gasket manufacturing solutions for industrial applications. We can produce gaskets according to customer drawings, samples, or technical specifications.
Custom dimensions and thicknesses
Special shapes and profiles
Different PTFE grades and material options
CNC machining and precision cutting
OEM and ODM manufacturing
Custom packaging and labeling
Various Shapes of PTFE Sealing Products
JINNAI SEAL offers custom PTFE seals in a wide range of shapes, sizes, and designs to meet different sealing requirements. Our products include PTFE rings, gaskets, washers, bushings, spring seats, and other precision-machined components. We support OEM and ODM customization based on drawings, samples, or specific application requirements, providing flexible solutions for your sealing needs.
PTFE Seals Applications
Chemical Processing Equipment – Sealing components used in pumps, valves, and chemical pipelines.
Hydraulic and Pneumatic Systems – PTFE seals for fluid and gas sealing applications.
Food and Beverage Equipment – Sealing parts for equipment requiring suitable material compliance.
Pharmaceutical Equipment – PTFE components for applications requiring chemical resistance and cleanliness.
Industrial Machinery – Custom PTFE seals, washers, and gaskets for various machines.
Pumps and Valves – Sealing components designed for demanding fluid-handling conditions.
Electrical and Electronic Equipment – PTFE insulating components and precision parts.
Package:We provide standard cartons, pallets and wooden cases. Custom packaging is available upon request to protect goods well for different shipments.
Payment Methods:Multi-currency settlement (CNY, USD, EUR, etc.). Multiple payment options including T/T, PayPal. Local bank transfer is available for some countries for faster transactions.
Delivery Method:We offer international express, air freight, sea freight and railway transport. You can also appoint your own forwarder for flexible delivery arrangements.
Jinnai Seal supplied different rubber seals for your choice
Jinnai Seal provides a comprehensive range of industrial sealing solutions, including bonded seals, O-rings, custom rubber seals, rubber balls, gaskets and washers, and oil seals. We offer a wide selection of materials, sizes, and customized designs to meet diverse application requirements.
Our products are designed to deliver reliable sealing performance, durability, and long-term reliability across industrial equipment, mechanical systems, and fluid sealing applications.
FAQs
What are the main advantages of PTFE seals?
PTFE seals offer excellent chemical resistance, low friction, non-stick properties, and a wide operating temperature range. They are suitable for many demanding industrial sealing applications.
Are PTFE seals compatible with all chemicals?
PTFE is resistant to a wide range of chemicals, including many acids, solvents, and corrosive media. However, compatibility should be evaluated based on the specific chemical, concentration, temperature, and operating conditions.
Can PTFE seals be used in high-temperature applications?
Yes. PTFE can perform in many high-temperature environments. The actual temperature limit depends on the PTFE grade, seal design, pressure, and operating conditions.
Do PTFE seals require lubrication?
PTFE has a low coefficient of friction and can operate with little or no lubrication in certain applications. Whether additional lubrication is required depends on the design, mating surface, speed, and operating conditions.
Can you manufacture custom PTFE seals based on drawings or samples?
Yes. JINNAI SEAL supports OEM and ODM customization based on customer drawings, samples, or specifications, including custom shapes, dimensions, materials, and designs.
What information is needed to select the right PTFE seal?
To recommend a suitable seal, please provide the dimensions, application, sealing medium, operating temperature, pressure, movement type, and installation details. Drawings or samples are also helpful.
