| CONSTRUCTION Style 2664 is a flexible graphite sheet reinforced with Mylar film, .0005” thick. The flexible graphite sheet is made from exfoliated graphite flake which is compressed into foil by a carefully controlled calendering process. In this process, the expanded flake particles are mechanically locked together without the use of fibers, binders or other additives. Sheets of foil are then adhesive bonded and laminated to the required thickness with the Mylar film in the center. APPLICATION / SERVICE Gaskets cut from Style 2664 flexible graphite sheet seal with low to moderate bolt loads and because of very low creep relaxation, re-torquing is rarely required. Flexible graphite conforms to irregular flange sealing surfaces and readily flows into flange irregularities enabling it to seal both smooth and coarse surface finishes. |
|
| SERVICE LIMITS: | |
| Temperature Limits: | |
| Minimum | -328°F (-200°C) |
| Maximum: | |
| In Air | 900°F (480°C) |
| In Steam | 1200°F (650°C) |
| In Reducing or inert media | 5400°F (3000°C) |
| Pressure Limits: | 2000 psi (140 bar) |
| Physical Properties: | |
| Compressibility | 40% (Tested under 5000 psi) |
| Recovery | 18% (Tested under 5000 psi) |
| Creep Relaxation | 5% |
| Tensile Strength | 650 psi |
| Compressive Strength | 35,000 psi |
| Density | 62.4 lbs/ft³ |
| Chemical Composition: | |
| Carbon Content | 98% minimum |
| Total Sulfur | 1200 ppm maximum |
| Leachable Chlorides | 50 ppm maximum |
| Available Sheet Sizes: | 39.4" x 39.4" |
| Thicknesses: | 1/64",1/32", 1/16", 1/8" |
| Properties and application parameters shown are typical and are presented in good faith but no warranty is expressed or implied. This edition supersedes all previous issues and all data is subject to change without notice. 11/96
|
|
