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Kaxite Seals produces expanded PTFE valve stem packing from 100% white virgin PTFE resin. The result is a soft, round packing with high tensile strength, self-lubrication and a low coefficient of friction — engineered for valves, faucet stems, rotating shafts, reciprocating plungers, stuffing boxes and flanges.
If your plant is fighting fugitive emissions, stem wear or frequent repacking downtime, this grade gives you a chemically inert, FDA-compliant sealing material that works from −268 °C to +280 °C and handles liquid pressure up to 8 MPa. Custom diameters from 1 mm to 20 mm and standard lengths of 5–100 m per roll are available, with OEM packaging and flexible MOQ for distributors and OEM valve builders.
Order directly from our Ningbo production line — no trading company margin, no hidden layers between your purchase order and the price you pay.
Diameters from 1 mm to 20 mm and standard lengths of 5–100 m per roll. Non-standard diameters and cut lengths are produced to your drawing or sample.
The expanded PTFE structure reduces stem wear and operating torque, extending packing life and lowering maintenance frequency.
Density, tensile strength, elongation, compressibility, recovery, creep relaxation, hardness, PH and moisture content are checked on every production run.
Neutral cartons, private-brand spool labels, custom pallet marking and full export documentation for distributors and valve manufacturers.
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 media except molten metal and liquid or gaseous fluorine; FDA 21 CFR 177.1550 compliant | — |
| Tensile strength | ≤10 MPa | JIS K 6891 |
| Bolt pressure | 8–20 MPa (for 3–25 mm width) | — |
| Density | 0.7–0.85 g/cm³ | ASTM D 4895 |
| Elongation | ≥20% | — |
| Compressibility | ≤40% | ASTM F-38 |
| Volatility | ≤1.0% | JIS K 6892 |
| Recovery | ≥16% | ASTM F-36 |
| Creep relaxation | ≤40% | ASTM F38 |
| Hardness | 30–70 HA | — |
| PH | 0–14 | — |
| Moisture content | ≤0.01% | ASTM D 4895 |
| Hot unstability | 10 | — |
| Average granule diameter | 500 μm | ASTM D 4895 |
Diameter from 1 mm to 20 mm. Standard length: 5–100 m/roll. Custom diameters and cut lengths are available on request.
| Diameter (mm) | Standard Length |
|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 | 5–100 m/roll |
Send your diameter, roll length, 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
