GYLON®, a product of Garlock Sealing Technologies, is a reinforced PTFE gasketing material that offers significantly reduced creep relaxation, cold flow, and excellent chemical resistance, along with easy identification due to branding and color coding.
GYLON® 3565 ENVELON® Benefits
- Tighter seal – on wavy or glass-lined flanges because of low bolt load requirements
- Ability to conform to surface irregularities – its soft, deformable exterior is perfect for pitted, warped, or worn flanges
- Elimination of leak-path and adhesive contamination – GYLON® layers are directly sintered, which makes this possible
- Easy installation – its rigid core assists in the instillation of large gaskets, and its unitized construction bypasses jacket foldover
- Inventory reduction – due to the availability of large sheets for convenient custom-cut gaskets; ideal replacement for milled, slit, formed shield, and double jacketed envelope gaskets
GYLON® 3565 ENVELON® Material Properties
| Color: | White exterior and blue interior |
| Composition: | PTFE with aluminosilicate microspheres |
| Fluid Services: | Moderate concentrations of acids, some caustics, hydrocarbons, solvents, hydrogen peroxide, refrigerants, and cryogenics |
| Min. Temperature: | -450 (°F) |
| Continuous Max: | 500 (°F) |
| Max. Pressure: | 1200 (PSI) |
| Maximum PxT 1/16: | 350,000 (°F x PSIG) |
| Maximum PxT 1/8: | 250,000 (°F x PSIG) |
| Flammability: | Will Not Burn |
| Bacterial Growth: | Will Not Support |
| Meets Specification: | FDA (Food and Drug Administration) |
