Durlon® 8900 is a premium grade compressed non-asbestos sheet gasket material for service conditions to 496°C (925°F) and continuous operating temperatures of -40ºC to 400°C (-40ºF to 752°F) or 13.8 MPa (2,000 psi). It is suitable for water, saturated steam, superheated steam, oil, mild alkalis and acids, hydrocarbons and solvents.
Durlon® 8900 was specially developed to withstand high temperature and pressure application with good chemical resistance. It contains high strength fibers and graphite fillers bonded with high performance nitrile (NBR) synthetic rubber. Rubber level was optimized to obtain a flexible sheet with good cutting properties without compromising on physical properties at high temperature.
| Color |
Black |
| Fiber System |
Aramid/Inorganic |
| Binder |
NBR |
Temp. Min.
Temp. Max.
Continuous, Max |
-40°C (-40°F)
496°C (925°F)
400°C (752°F) |
| Pressure, max, bar (psi) |
138 (2,000) |
| Density, g/cc (lbs/ft3) |
1.6 (100) |
| Compressibility, % |
7-17 |
| Recovery, % |
50 |
| Creep Relaxation, % |
15 |
| Tensile Strength, MPa (psi) |
13.8 (2,000) |
Sealability
ASTM 2378 (Nitrogen) |
0.2 cc/min |
Fluid Resistance, ASTM F146 IRM 903 Oil 5hrs at 300°F
Thickness Increase, %
Weight Increase, % |
3
15 |
Fluid Resistance, ASTM Fuel B 5hrs at 70°F
Thickness Increase, %
Weight Increase, % |
4
12 |
| Flexibility, ASTM F147 |
12x |
| Volume Resistivity, ohm-cm ASTM D257 |
4.01 x 100 |
Stress Relaxation, DIN 52913 @ 7,252psi (50 MPa)
16 hr @ 347°F (175°C)
16 hr @ 572°F (300°C) |
6,500 (44.8) Min.
6,000 (41.4) Min. |
Note: ASTM properties based on 1/16″ sheet thickness except ASTM F38, which is based on 1/32″ sheet thickness. This is a general guide only and should not be the sole means of accepting or rejecting this material. The data listed here falls within the normal range of product properties but should not be used to establish specification limits nor used alone as the basis of design.
*For applications above Class 300, consult your representative.
