ePTFE Joint Gasketing
ePTFE is available in sheet, tape or cord (joint sealant) form. The tape and cord forms are solid form-in-place products.
Cold flow is most effectively reduced in expanded PTFE gaskets (ePTFE) by physically altering the PTFE microstructure.
The ePTFE microstructure is a network of interconnected nodes and fibrils that increases the tensile strength of the material, decreases the density of the material and increases the compressibility of the material. Because of the high compressibility, ePTFE gaskets conform well to surface irregularities. Unlike virgin and filled PTFE gaskets, ePTFE materials are more easily applied in glass-lined steel, fragile plastic flanges and other fragile flanges. In addition, ePTFE is available in sheet, tape or cord (joint sealant) form. The tape and cord forms are solid form-in-place products.
Expanded PTFE Sheet
Materials are more easily applied in glass-lined steel, fragile plastic flanges and other fragile flanges.
For Gasket
Technical Data
| Item | Unit | Value |
|---|---|---|
| Color | —— | White |
| Specific gravity | g/cm3 | 0.8±0.05 |
| Tensile strength | Mpа | ≥10 |
| Recovery | % | ≥10 |
| Temperature | ℃ | -218~280 |
Standard Sheet Dimension
| Length | Width | Thickness | |||
| Metric/mm | Imperial/inch | Metric/mm | Imperial/inch | Metric/mm | Imperial/inch |
| 1500 | 60 | 1500 | 60 | 1.5mm/3.0mm | 1/16";1/8" |
ePTFE Joint Sealant Tape
In principle, the choice of tape follows the dimensions of flange, as the table below. Joint Sealant Size Selection According to Flange Size
Easy sealing
- Tape width: 3mm (1/8”) to 50mm (2”)
- Tape thickness: 1.5mm(1/16”) to 6mm(1/4”)
- Tape length: unlimited.
| ANSI/ASTM FLANGE 150#,300# | |
| Nominal Flange | Tape Width |
| 1/2" | 1/8" |
| 3/4" to 1-1/2" | 3/16" |
| 2" to 4" | 1/4" |
| 5" to 8" | 3/8" |
| 10" to 16" | 1/2" |
| 18" to 24" | 5/8" |
| 24" to 36" | 3/4" |
| ≥36" | 1" |
| Metric Flange / PN10-PN20 | |
| Nominal Flange | Tape Width |
| DN15 | 3mm |
| DN20-DN40 | 5mm |
| DN50-DN100 | 7mm |
| DN125-DN200 | 10mm |
| DN250-DN400 | 12mm |
| DN450-DN600 | 17mm |
| DN600-DN900 | 20mm |
| ≥DN1000 | 25mm |