Home / Products / Expanded PTFE Gasket

Custom Cut Expanded PTFE Gasket

Custom-cut ePTFE gaskets in any shape — round, oval, rectangular, or irregular. No mold cost. MOQ is confirmed with each quote. Ready to install.

✓ Any Shape ✓ No Tooling Cost ✓ Samples available ✓ Any Quantity
Request a Quote

What Is an Expanded PTFE Gasket?

ePTFE gaskets combine the conformability of expanded PTFE with precision cutting to produce a gasket that fits your exact flange geometry.

Custom cut expanded PTFE gasket in round shape

Expanded PTFE (ePTFE) gaskets are cut from ePTFE sheet material to match your specific flange dimensions and geometry. Unlike molded or compression-molded gaskets, ePTFE cut gaskets require no tooling — making them ideal for prototypes, small batches, and non-standard flange sizes.

The ePTFE material itself provides the key advantage: it is soft, compressible, and highly conformable, meaning it forms a reliable seal even on slightly imperfect flange surfaces. The microporous fibrillated structure resists creep and cold flow under sustained bolt load — the seal remains stable without re-torquing.

Send us your flange dimensions, a drawing, or a physical sample, and we cut the gasket to fit. No mold cost. MOQ and lead time are confirmed with each quote.

Technical Specifications

Properties of the ePTFE material from which gaskets are cut. Custom dimensions and tolerances available on request.

🌡️
-260°C ~ +260°C
Temperature Range
⚡
207 bar
Max Pressure (3000 PSI)
📐
Any Size
Custom Dimensions
🧪
pH 0–14
Chemical Resistance
✉️
Samples available
Email for a sample
PropertyValueTest Standard
Temperature range-260°C to +260°C—
Operating pressureVacuum to 207 bar (3000 PSI)—
Chemical resistancepH 0–14 (except molten alkali metals & F₂)—
Sealability (helium, 0.8mm)0.06 ml/hrASTM F37B
Compressibility (0.8mm)63.6%ASTM F36
Elastic resilience (0.8mm)≥8.8%ASTM F36
Stress relaxation (0.8mm)16.3%ASTM F38

Shapes We Cut

We cut ePTFE gaskets to any shape from your drawings, sketches, or physical samples.

⭕

Round / Circular

Full-face, raised-face, and ring gaskets for ANSI/ASME, DIN, JIS, and custom pipe flanges. Standard and non-standard sizes.

⬭

Oval

For oval flange openings in heat exchangers, vessel manways, and specialized process equipment.

▭

Rectangular

For flat flanges, pressure vessels, tanks, and custom rectangular openings. Any aspect ratio.

⬡

Custom / Irregular

Any irregular shape — send a drawing, DXF, or PDF, and we'll cut it to exact tolerances.

Send your drawing or sample → We cut to your exact dimensions → Ship to you ready to install

How to Order Custom ePTFE Gaskets

Four simple steps from drawing to delivered gasket. MOQ is confirmed with each quote.

1

Send Your Drawing

Upload a PDF, DXF, CAD drawing, or even a hand sketch with dimensions. Alternatively, send a physical sample and we'll reverse-engineer it.

2

We Confirm Specs

Our team reviews your drawing, confirms dimensions, material grade, and tolerance. We send you a quote within 24 hours.

3

We Cut & Inspect

Gaskets are precision-cut by water jet or knife cutting. Every piece is inspected against your drawing before packing.

4

Shipped to You

Packed and shipped globally. MOQ is confirmed with each quote.

Upload Drawing / Request Quote

Why Choose ePTFE Cut Gaskets?

ePTFE cut gaskets vs. molded rubber or aramid fiber gaskets — the key advantages.

🔧 No Tooling Cost

Unlike injection-molded or compression-molded gaskets, ePTFE cut gaskets require no mold. This makes them cost-effective for prototypes, small batches, and non-standard sizes where tooling would be prohibitively expensive.

📐 Any Shape, Any Size

We cut to your drawing — not your drawing to our mold. Round, oval, rectangular, or completely irregular. Custom gaskets for non-standard equipment are our specialty.

🧪 Universal Chemical Resistance

ePTFE resists all common industrial chemicals across pH 0–14. No rubber swelling, no fiber degradation — just pure inert PTFE sealing performance in the harshest chemical environments.

🌡️ Extreme Temperature Range

From -260°C (cryogenic service) to +260°C (high-temperature steam and thermal oil). Suitable for liquid nitrogen, steam, and thermal cycling applications where rubber and fiber gaskets fail.

↩️ Zero Cold Flow / Creep

The expanded fibrillated structure eliminates cold flow under bolt load. The gasket stays in place and maintains its seal — no re-torquing, no squeeze-out, no leakage over time.

✉️ Samples available

Samples available. Email sales@liantuoptfe.com.

❌ Order Quantity

MOQ is confirmed with each quote.

📦 Long Shelf Life

ePTFE does not age, harden, or degrade in storage. Stock up on spare gaskets without worrying about shelf life — they perform when you need them.

Industry Applications

ePTFE cut gaskets are specified by engineers across chemical and industrial manufacturing.

🧪 Chemical Processing

Handles aggressive acids, alkalis, and solvents in chemical storage, reactors, heat exchangers, and piping. The universal chemical resistance of ePTFE covers applications where other materials fail.

🍽️ Other Equipment

Samples available.

💊 Process Equipment

Samples available.

⚙️ Pump & Valve

Reliable static seals for centrifugal pumps, diaphragm valves, and process valves. Conforms to slightly worn or imperfect flange faces without leaking.

⛽ Oil & Gas

Resistant to petroleum fluids, natural gas, and process chemicals in upstream and downstream oil and gas applications. Wide temperature range handles both cryogenic LNG and high-temperature process streams.

💨 Steam Systems

Rated to +260°C for saturated and superheated steam applications. Zero hydrolysis ensures long service life in steam condensate environments where organic gaskets degrade rapidly.

Frequently Asked Questions

Common questions from engineers and procurement teams about custom ePTFE gaskets.

Q: What information do you need to quote a custom ePTFE gasket?
Ideally: a PDF, DXF, or CAD drawing with dimensions, tolerance requirements, flange standard (ANSI/DIN/JIS), and pressure class. If you don't have a drawing, a sketch with key dimensions or a physical sample is also fine. We can reverse-engineer from a sample. Also tell us quantity and the application (temperature, pressure, and chemical environment). Samples are available.
Q: What is the minimum order quantity?
MOQ is confirmed with each quote.
Q: What tolerances can you hold on cut gaskets?
Tolerances are confirmed against your drawing.
Q: How long does it take to produce a custom gasket?
Lead time depends on part complexity and quantity and is confirmed with each quote.
Q: Can you supply gaskets to match our existing flange dimensions?
Yes — send us your drawing, a sketch, or a physical sample, and we cut to match exactly. If you know the flange standard (e.g., ANSI B16.5 Class 150 RF DN50), we can look up the standard gasket dimensions and cut to those specifications.
Q: What is the difference between a cut gasket and a molded gasket?
Cut gaskets are sliced from sheet material — no mold is needed. Molded gaskets require a custom mold for each shape. Cut gaskets are ideal for small quantities, non-standard sizes, and prototypes because there is no mold cost or mold lead time. For very high volumes (thousands of identical gaskets), molded parts may offer a unit cost advantage.
Q: Can ePTFE gaskets be used on raised-face and flat-face flanges?
Yes. ePTFE cut gaskets work on both raised-face (RF) and flat-face (FF) flanges. For raised-face flanges, the gasket should be sized to the raised face diameter. For flat-face flanges, the gasket covers the full flange face. Tell us your flange type when requesting a quote.
Q: Do you offer spiral wound or Kammprofile gaskets?
We specialize in solid ePTFE cut gaskets. For spiral wound or Kammprofile (Camprofile) gaskets — which use a metal inner support structure — these require specialized manufacturing equipment. Contact us with your requirements and we will advise whether ePTFE cut gaskets are suitable for your application, or refer you to a specialist supplier if needed.

Related Articles

Technical guides for engineers and procurement teams.

🔧

ePTFE Gasket Installation Guide

Bolt torque sequence, flange preparation, and best practices for getting the best seal from your ePTFE gaskets.
⚖️

ePTFE vs Standard PTFE Gaskets

Compare material properties and sealing performance for your gasket application.
🔧

PTFE Sealing Solutions

Choosing between ePTFE sheet, cut gaskets, and joint sealant tape for your specific sealing requirements.

Need a Custom ePTFE Gasket?

Send us your drawing or sample — any shape, any size, any quantity. No tooling cost. Quote within 24 hours.

Request a Quote