PTFE Enveloped Gasket
DESCRIPTION
The sealing insert is made of corrugated stainless steel, soft non- asbestos material, or rubber and different combinations. This insert is coated with PTFE and open on one side, usually on the outside.
SHAPE AND CONSTRUCTION
- The PTFE enveloped gaskets are produced in several types to meet the most demanding applications.
- Standard shapes are round or oval.
- Enveloped materials: Virgin PTFE.
- Base material: Stainless steel, non-asbestos material, rubber,..
SIZES
The PTFE enveloped gaskets with maximum external diameter of up to 500mm are made in one piece, for gaskets with greater diameters they are welded. Oval shapes of PTFE envelopes are welded. There are no limitations regarding sizes for gaskets with welded envelopes. Below table shows standard dimensions of PTFE enveloped gaskets:
EN 1514-3
| Gasket outside Diameter (mm) | Envelop outside Diameter (mm) | Gasket inside Diameter (mm) | DN (mm) | |||||
|---|---|---|---|---|---|---|---|---|
| PN63 | PN40 | PN25 | PN16 | PN10 | PN6 | PN class | ||
| 56 | 46 | 46 | 46 | 46 | 39 | 36 | 18 | 10 |
| 61 | 51 | 51 | 51 | 51 | 44 | 40 | 22 | 15 |
| 72 | 61 | 61 | 61 | 61 | 54 | 50 | 27 | 20 |
| 82 | 71 | 71 | 71 | 71 | 64 | 60 | 34 | 25 |
| 88 | 82 | 82 | 82 | 82 | 76 | 70 | 43 | 32 |
| 103 | 92 | 92 | 92 | 92 | 86 | 80 | 49 | 40 |
| 113 | 107 | 107 | 107 | 107 | 96 | 92 | 61 | 50 |
| 138 | 127 | 127 | 127 | 127 | 116 | 110 | 77 | 65 |
| 148 | 142 | 142 | 142 | 142 | 132 | 126 | 89 | 80 |
| 174 | 168 | 168 | 162 | 162 | 152 | 151 | 115 | 100 |
| 210 | 194 | 194 | 192 | 192 | 182 | 178 | 141 | 125 |
| 247 | 224 | 224 | 218 | 218 | 207 | 206 | 169 | 150 |
| 309 | 290 | 284 | 273 | 273 | 262 | 260 | 220 | 200 |
| 364 | 352 | 340 | 329 | 328 | 317 | 314 | 273 | 250 |
| 424 | 417 | 400 | 384 | 378 | 373 | 365 | 324 | 300 |
| 486 | 474 | 457 | 444 | 438 | 423 | 412 | 356 | 350 |
| 543 | 546 | 514 | 495 | 489 | 473 | 469 | 407 | 400 |
| 571 | 564 | 555 | 539 | 528 | 528 | 458 | 450 | |
| 628 | 624 | 617 | 594 | 578 | 578 | 508 | 500 | |
| 747 | 731 | 734 | 695 | 679 | 679 | 610 | 600 | |
