Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of ptfe gaskets in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made ptfe gaskets from our factory.
What Are PTFE Gaskets
PTFE gaskets are engineering sealing components made from polytetrafluoroethylene (PTFE), commonly used for sealing, insulation, and chemical-resistant protection between industrial equipment connections. They are widely used in industrial fields due to the excellent properties of PTFE. They can be customized by size, shape, hole position, thickness, and material option for different sealing applications.
Industry Applications
Chemical Processing
Chemical processing systems often handle corrosive media, including acids, alkalis, and solvents. PTFE gaskets support chemical-resistant sealing for pipelines, valves, pumps, and reactors exposed to aggressive working conditions.
Food Processing
Food processing equipment requires clean and non-stick sealing to reduce material buildup and support easier cleaning. PTFE gaskets can be customized for filling lines, mixing tanks, and processing equipment.
Pharmaceutical Industry
Pharmaceutical equipment needs low-contamination sealing for clean production environments. PTFE gaskets can support reactors, filters, and clean equipment where material stability and sealing cleanliness matter.
Water Treatment
Water treatment systems often involve chemical dosing, pumps, and filtration equipment. PTFE gaskets help provide compatible sealing for treatment chemicals, fluid transfer, and equipment connections.
Oil & Gas
Oil and gas systems require sealing for pipes, valves, and industrial equipment. PTFE gaskets can be designed to match flange sizes, pressure conditions, and media requirements.
Semiconductor Industry
Oil and gas systems require sealing for pipes, valves, and industrial equipment. PTFE gaskets can be designed to match flange sizes, pressure conditions, and media requirements.
Equipment Applications
Flanges
Flange sealing requires accurate bolt holes, sizes, and standard matching. PTFE gaskets can be produced according to ID, OD, hole layout, and flange standard.
Valves
Valves require chemical and pressure compatibility to maintain stable sealing during fluid control. PTFE gaskets can be customized by material, thickness, and sealing surface requirements.
Pumps
Pump connections require reliable inlet and outlet sealing. PTFE gaskets can be adjusted by shape, size, and edge quality to fit different pump interfaces.
Reactors
Reactors often need corrosion-resistant sealing because they may handle aggressive chemical media. PTFE gaskets can be selected for chemical resistance and customized to match reactor openings.
Pipe Flanges
Pipe flanges may require a standard or non-standard gasket fit. PTFE gaskets can be manufactured according to flange standards, bolt pattern, size, and working medium.
Heat Exchangers
Pipe flanges may require a standard or non-standard gasket fit. PTFE gaskets can be manufactured according to flange standards, bolt pattern, size, and working medium.
Material Properties
Excellent chemical stability
PTFE Gaskets are hardly corroded by any chemical media, including strong acids (such as concentrated sulfuric acid, aqua regia), strong alkalis, organic solvents, and oxidants. It is suitable for corrosive environments such as chemical, pharmaceutical, and electroplating.
Excellent electrical insulation
It has high dielectric strength, is non-conductive, and is suitable for high-voltage electrical equipment, cable sheaths, etc.
Wide temperature range
• PTFE Gaskets can work stably for a long time at -100°C to +280°C, and can
withstand 300°C for a short time.
• Suitable for high temperature (such as hot oil system) or ultra-low temperature
(such as liquid nitrogen, liquid oxygen environment).
Very Low Friction Coefficient (Self-Lubricating)
• Its friction coefficient is only 0.05~0.1, which is lower than most plastics and
metals.
• Suitable for oil-free lubrication or a high cleanliness environment.
Good Non-Stick Properties (Anti-Stick)
PTFE gaskets have a smooth surface and are not easy to adhere to materials, making them suitable for industries such as food and plastic processing.
Technical Parameters
|
Parameter Category |
Technical Item |
Reference Value / Range |
Notes |
|
Thermal Performance |
Service Temperature |
-200°C to +260°C |
Performance may decline above +260°C |
|
Short-Term Heat Resistance |
Up to +300°C |
For short exposure only, depending on working conditions |
|
|
Melting Point |
327–342°C |
Typical PTFE material reference |
|
|
Mechanical & Physical Properties |
Density |
2.1–2.3 g/cm³ |
Common range for virgin PTFE |
|
Tensile Strength |
≥15 MPa or ≥17 MPa |
Depends on material grade and test standard |
|
|
Elongation at Break |
≥200% |
Reflects flexibility and material ductility |
|
|
Hardness |
50–65 Shore D |
Common range for PTFE gasket material |
|
|
Compressibility |
Customized by thickness and structure |
Affects sealing compression under load |
|
|
Recovery Rate |
Based on gasket type and material |
Indicates recovery after compression |
|
|
Pressure & Sealing Parameters |
Operating Pressure |
≤10 MPa for Virgin PTFE |
Actual value depends on flange, thickness and installation load |
|
Filled PTFE Pressure Support |
≥16 MPa |
Depends on filler type, gasket structure and application |
|
|
Creep Relaxation / Cold Flow |
13–35% |
Depends on material formulation, filler type, thickness and testing standards |
|
|
Gasket Thickness |
Customized by Drawing or Application |
Commonly selected by sealing pressure & flange condition |
|
|
Flange Compatibility |
Flat Face, Raised Face, Full Face, Custom Face |
Confirmed by drawing or flange standard |
|
|
Chemical & Electrical Properties |
pH Range |
0–14 |
Suitable for most strong acids and alkalis |
|
Chemical Resistance |
Acids, Alkalis, Solvents, Oxidizing Media |
Confirm medium compatibility before ordering |
|
|
Dielectric Strength |
20–60 kV/mm |
Suitable for insulation-related sealing applications |
|
|
Water Absorption |
Nearly 0 |
Supports stable performance in humid or fluid environments |
Why Custom PTFE Gaskets Matter for Your Application
PTFE gaskets are widely used in sealing applications that require chemical resistance, temperature stability, and reliable performance. However, standard gaskets may not fully match the equipment structure, flange design, media type, pressure level, or installation requirements.
Custom PTFE gaskets help improve sealing reliability by matching the material, size, thickness, shape, and tolerance to your actual working conditions. This can reduce leakage risks, replacement frequency, and unexpected downtime.
Our Custom PTFE Gasket Services
As a custom sealing components manufacturer, we provide OEM and ODM support based on your drawings, samples, or application requirements. Our services cover material selection, design support, mold manufacturing, precision processing, prototyping, batch production, and quality inspection to help you source PTFE gaskets that fit your project needs.
|
Capability |
What Can Be Customized |
|
Size |
ID, OD, Length, Width, Hole Diameter and Hole Spacing |
|
Thickness |
Standard or Project-Specific Thickness |
|
Shape |
Round, Ring, Flat, Full Face, Raised Face, Washer or Special Shape |
|
Material |
Virgin PTFE, Expanded PTFE, Filled PTFE |
|
Processing |
CNC Cutting, Die Cutting, Cross Cutting, Rubber to Metal Bonding |
|
Order Type |
Samples, Trial Orders, Bulk Orders, OEM Projects |
Types of PTFE Gaskets We Can Customize
We customize different types of PTFE gaskets based on drawings, samples, flange standards, equipment structures, and sealing requirements.
Customized Specifications
Custom PTFE gaskets can be tailored to your equipment structure, flange standard, sealing environment, and order requirements. From dimensions and material selection to hole patterns, standards, and packaging, we support flexible customization for prototypes, trial orders, and bulk production.
Custom PTFE gaskets can be produced according to drawings, samples, equipment interfaces, or flange standards to ensure proper fit during installation.
Length & Width: Customized for rectangular, square, irregular, or equipment-specific gasket designs.
ID & OD: ID & OD: Inner diameter and outer diameter can be adjusted for flange, ring, washer, and pipe connection needs.
Thickness: Selected according to compression, sealing pressure, flange condition, and application requirements.
Shape and hole design can be customized to match different sealing surfaces, installation structures, and bolt-hole layouts.
Standard Shapes: Ring, square, oval, flat, full face, raised face, and washer shapes.
Complex Designs: Irregular shapes, special profiles, multi-edge structures, and non-standard equipment interfaces.
Hole Patterns: Bolt holes, center holes, multi-hole layouts, and positioning holes for accurate flange or equipment alignment.
PTFE material options can be selected according to working medium, temperature, pressure, cleanliness requirements, and sealing conditions.
Virgin PTFE: Suitable for clean, general corrosive, food, pharmaceutical, and low-contamination sealing applications.
Expanded PTFE: Suitable for rough flanges, irregular sealing surfaces, and applications requiring better conformability.
Filled PTFE: Suitable for higher mechanical requirements, improved dimensional stability, better wear resistance, and reduced creep.
Custom PTFE gaskets can be manufactured according to international flange standards or customer-specific drawings.
Common Standards: ANSI, DIN, JIS, EN, GB, and other industrial flange standards.
Drawing-Based Standards: Custom dimensions, hole positions, tolerances, and sealing surfaces based on customer drawings.
Sample-Based Matching: Existing gasket samples can be used for reverse matching when drawings are unavailable.
Packaging can be arranged according to order quantity, gasket size, project use, and OEM supply requirements.
Bulk Packaging: Suitable for wholesale orders, standard items, and repeated batch supply.
Labeled Packaging: Size, material, drawing number, quantity, and batch information can be marked for easier identification.
OEM Packaging: Packaging style, label format, and project-specific packing method can be arranged according to customer requirements.
Machining Method
We use different processing methods to produce custom PTFE gaskets according to gasket shape, dimensional tolerance, order quantity, material thickness, and application requirements.
CNC Cutting PTFE Gaskets
CNC cutting is suitable for custom PTFE gaskets that require accurate dimensions, special outlines, or complex shapes.
• Precision Dimensions: Supports accurate length, width, ID, OD,
and hole position control.
• Complex Shapes: Suitable for irregular profiles, non-standard
designs, and equipment-specific gasket layouts.
• Small-Batch Flexibility: Useful for samples, trial orders, and
customized project requirements.
Die Cutting PTFE Gaskets
Die cutting is suitable for repeated PTFE gasket orders with stable shapes and consistent dimensions.
• Batch Production: Suitable for large quantities of the same
gasket design.
• Consistent Shape: Helps maintain uniform size, edge shape, and
production repeatability.
• Cost Efficiency: More suitable when the same specification is
ordered repeatedly.
Rubber to Metal Bonding PTFE Gaskets
Rubber to metal bonding PTFE gaskets are suitable for applications requiring both elastic sealing and structural support from a metal component.
• Strong Adhesion: Bonds rubber material firmly to metal inserts or
frames.
• Stable Sealing Support: Combines sealing flexibility with
stronger structural stability.
• Special Assembly Use: Suitable for equipment interfaces that
require integrated rubber-metal sealing parts.
Cross Cutting PTFE Gaskets
Cross cutting is suitable for PTFE gaskets or PTFE sheets that need straight-line cutting, fixed-width strips, or simple rectangular profiles.
• Straight-Line Cutting: Supports clean cutting for rectangular,
square, strip-shaped, or basic flat gasket designs.
• Fixed Size Control: Suitable for length, width, and
thickness-based customization from PTFE sheet materials.
• Efficient Pre-Cutting: Helps prepare PTFE blanks before further
CNC cutting, punching, or secondary processing.
Quality Control
To help ensure that each custom PTFE gasket matches your drawing, sample, equipment interface, and sealing requirements, we apply strict quality checks from material confirmation to final packaging. This helps reduce production errors, improve installation fit, and support more consistent repeat orders.
- Material Confirmation: checks the selected PTFE type and material requirement before production
- Drawing Review: verifies size, hole position, shape, and tolerance to reduce production errors
- Dimension Inspection: checks ID, OD, thickness, and hole distance for proper installation fit
- Surface Check: reviews burrs, deformation, and edge quality to support better sealing performance
- Batch Check: confirms quantity, labeling, and packaging consistency for easier storage, delivery, and repeat orders
Learn More About Our Quality Control
Order Support from Sample to Delivery
We support custom PTFE gasket orders from sample confirmation to bulk production and delivery. Whether you need a trial sample, repeated wholesale supply, OEM packaging, or technical assistance before production, our team can help make the sourcing process more efficient and reliable.
- Sample support before bulk production.
- Packaging by size, material, drawing number or batch.
- Support for wholesale and bulk PTFE gasket orders.
- Technical consultation for material selection and drawing confirmation.
- Assistance with required inspection or audit documents when available.
Send Inquiry for Custom PTFE Gaskets
FAQ
Q: Can PTFE Gaskets Be Custom-Made by Drawing?
A: Yes. PTFE gaskets can be customized according to drawings, samples, equipment interfaces, or flange standards. Size, thickness, shape, hole position, material type, and packaging method can be adjusted for different OEM sealing requirements.
Q: What Information Should I Provide for a Custom PTFE Gasket Quote?
A: A clear quote usually requires drawing or sample, size, thickness, material requirement, working medium, temperature, pressure, order quantity, and packaging needs. If the application is special, flange standard or equipment photos can also help.
Q: Which PTFE Material Should I Choose?
A: Material selection depends on the sealing condition. Virgin PTFE is suitable for clean and general corrosive sealing, expanded PTFE is suitable for rough or irregular flange surfaces, and filled PTFE is suitable for higher mechanical stability, wear resistance, or reduced creep.
Q: Do You Support Bulk or Wholesale PTFE Gasket Orders?
A: Yes. Custom PTFE gaskets can be supplied for samples, trial orders, bulk orders, and OEM/ODM projects. For repeat orders, size, material, drawing number, batch label, and packaging method can be managed for easier purchasing and warehouse use.
Q: Why Do PTFE Gaskets Leak?
A: PTFE gasket leakage may be caused by incorrect size, unsuitable material, uneven flange surface, wrong thickness, insufficient compression, inaccurate hole position, or improper installation. Providing real working conditions helps improve gasket design before production.
Q: What Certificates or Documents Can Be Supported?
A: Material information, inspection records, size confirmation, packaging labels, and related compliance documents can be discussed according to the order and application requirements. Food, pharmaceutical, chemical, or export projects should confirm document needs before production.
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