Application:
With an extremely wide pH application range, DURLON® 8400 can be used in process piping and equipment in chemical, pulp and paper, and other general industrial applications. A unique high-performance compressed sheet DURLON® 8400 is an excellent gasket material for use in steam, mild caustics and acids in Class 150 and 300 service.
Composition:
DURLON® 8400 contains high temperature phenolic fibres and minerals combined with high-grade nitrile (NBR) rubber. It exhibits higher temperature limits than aramid based materials and the handling and cutting characteristics are greatly improved over carbon and glass fibre products.
Anti-stick properties:
Much effort has gone into improving the anti-stick release agents of all compressed DURLON® products. All DURLON® compressed gasket materials have passed the MIL-G-24696B Navy Adhesion Test (366°F/48 hrs).
Ph range:
DURLON® 8400 has a pH application range of 2 to 13 at room temperature, the widest any compressed sheet gasket material produced today. This makes DURLON® 8400 especially suitable in pulp and paper, and chemical plant applications.
Typical Physical Properties:
| Colour | Gold |
| Fibre System | Phenolic |
| Binder | NBR |
| Temperature Min Max Max, continuous |
-73°C (-100°F) 427°C (800°F) 290°C (554°F) |
| Pressure, max, bar (psi) | 103 (1,500) |
| Density, g/cc (lbs/ft3) | 1.7 (106) |
| Compressibility, % ASTM F36 |
8-16 |
| Recovery, % ASTM F36 |
50 |
| Creep Relaxation, % ASTM F38 |
25 |
| Tensile Strength across grain ASTM F152, MPa (psi) |
12.4 (1,800) |
| Fluid Resistance, ASTM F146 IRM 903 Oil 5 hours at 149°C (300°F) Thickness Increase, % Weight Increase, % ASTM Fuel B 5 hours at 21°C (70°F) Thickness Increase, % Weight Increase, % |
0-15 150-10 15 |
| Sealability, ASTM F37 (Fuel A), ml/hr ASTM F37 (Nitrogen), ml/hrASTM F37 (Nitrogen), cc/min |
0.01 0.3 0.03 |
| Volume Resistivity ASTM D257, ohm-cm |
3.1 x 1013 |
| Dielectric Breakdown ASTM D149, kV/mm (V/mil) |
14.6 (371) |
| Gasket Factors m Y, psi Gb, psi a Gs, psi |
1/16″ 1/8″ 2.9 4.5 2,410 (16.6) 3,967 (27.4) 2,000 (13.8) 1,076 (7.4) 0.194 0.289 340 (2.3) 94 (0.7) |
| Flexibility, ASTM F147 |
8x |