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Kaxite Seals manufactures expanded PTFE gaskets from 100% virgin ePTFE sheet. The material is soft, twistable and bendable at will, with a micro-porous network that resists cold flow and creep relaxation — even when temperature and pressure alternate, sealing performance stays stable.
If your maintenance team is dealing with pitted, warped, glass-lined or irregular flanges that a standard gasket cannot seal, this is the practical replacement. It works from −268 °C to +280 °C, handles liquid pressure up to 8 MPa, and is FDA 21 CFR 177.1550 compliant for food and pharmaceutical contact.
Custom sizes, die-cut shapes, OEM private-label packaging and flexible MOQ are available for B2B buyers. Send your drawing or flange specification and we will quote.
Order straight from our Ningbo production line — no trading company markup, no hidden layer between your purchase order and the price you pay.
Send a drawing, DXF file or sample. We produce gaskets to your exact dimensions, including irregular shapes and non-standard bolt patterns.
The soft, compressible network flows into pits, warping and surface irregularities at low bolt load — no re-machining required.
Density, tensile strength, compressive strength, compression, recovery and creep relaxation are checked on every production run.
Neutral cartons, private-brand labels, custom pallet marking and full export documentation for distributors and project contractors.
Swipe horizontally to see the full property table →
| Property | Value | Test Standard |
|---|---|---|
| Working temperature | −268 °C to +280 °C (melting point 327 °C) | ASTM D 4895 |
| Working pressure | ≤8 MPa (liquid service) | JIS K 6891 |
| Working medium | All corrosive media except molten metal and liquid or gaseous fluorine; FDA 21 CFR 177.1550 compliant | — |
| Density | 0.7–0.9 g/cm³ | ASTM D 4895 |
| Tensile strength | ≥10 MPa | ASTM F-152 |
| Compressive strength | ≤140 MPa | GB/T 20671.2 |
| Compression (35 MPa load, t = 3 mm) | 59.55% | GB/T 20671.2 · F-36 |
| Recovery (35 MPa load, t = 3 mm) | 11.61% | GB/T 20671.2 · F-36 |
| Creep relaxation (100 °C × 22 h, t = 3 mm) | 68.32% | GB/T 20671.5 · F-38 |
| Nitrogen seal (17.25 MPa) | 0.16 ml/hr (internal pressure 4 MPa) | JB/T 10688 · DIN 3535-4 |
| Nitrogen seal (35 MPa) | 0.0037 ml/hr (internal pressure 4 MPa) | JB/T 10688 · DIN 3535-4 |
Expanded PTFE gaskets are cut from ePTFE sheet with the following standard thicknesses. Sheet size: 1500 × 1500 mm (up to 2000 × 2000 mm on request).
To your order — send a drawing, DXF file or physical sample. We produce:
Maximum sheet size: 2000 × 2000 mm. Non-standard thicknesses and dimensions are produced to your drawing — send the specification with your enquiry.
Pipe flanges, reactors, tanks and heat exchangers handling aggressive acids, solvents and steam.
Low bolt preload requirement makes it ideal where the flange itself is fragile or irregular.
The soft, compressible network conforms to pitted and misaligned sealing faces without extra machining.
Enamel lining, glass lining, plastic lining, rubber lining, graphite lining and titanium steel towers.
Clean, dust-free production means no contamination of the process medium.
Cut gaskets and linings for equipment that sees frequent thermal cycling and pressure fluctuation.
Gasket size, thickness, quantity, working medium and destination port. Drawing, DXF or sample preferred.
We reply with unit pricing, tooling cost (if any), lead time and shipping options. Evaluation samples available.
Choose neutral export cartons or private-label packaging. We confirm pallet configuration and documentation.
Batch inspection covers density, tensile strength and compression. Inspection reports issued with shipping documents.
Yes. We produce custom-sized and die-cut expanded PTFE gaskets to your drawing, DXF file or sample. Send the gasket dimensions, thickness, quantity and working medium, and we will confirm tooling and unit price before production.
The MOQ is flexible. Small trial orders are accepted so you can validate performance in real service, as well as full container loads for ongoing distribution or project programmes.
Standard sizes ship quickly from stock. Custom die-cut shapes, private-label packaging and large project volumes are confirmed at the time of quotation so you can plan your maintenance or installation schedule accurately. Typical delivery lead time is 7 to 30 days depending on specification and quantity.
Yes. The material complies with FDA 21 CFR 177.1550 and is produced in a dust-free workshop from 100% virgin PTFE sheet, so there is no contamination of the process medium and no recycled resin in the compound.
Yes. We supply neutral export cartons or customer-branded labels, cartons and pallet marking. Distributors typically combine private-label packing with mixed-size containers.
Density, tensile strength, compressive strength, compression, recovery and creep relaxation are measured on every production run against ASTM, GB/T and JIS test methods. Batch inspection records can be supplied with the shipment on request.
Send your gasket drawing, dimensions, thickness, quantity and destination port. Our sales engineers reply with a quotation, available samples and the packing options for your market.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
