Durlon® 7900
Durlon® 7900 is an economy grade general service gasket sheet material made with NBR (Nitrile Bonded Rubber) binder for mild service in piping and equipment with applications in steam, hydrocarbons and refrigerants. An economical alternative when service ranges and applications are not severe.
This series is made from aramid and a NBR general-purpose material. The economy compressed sheets are proven to significantly lower emission levels. Each material in this series is color-coded for easy identification; all full-sized economy compressed sheets are date coded and quality assurance traceable.
| Industries | Chemical Processing, General Industry, Mining, OEM Services, Rail-Tank Car |
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An economy grade general service compressed sheet with NBR rubber binder for mild service in piping and equipment and OEM applications in steam, hydrocarbons and refrigerants. An economical alternative when service ranges and applications are not severe.
Durlon® 7900 contains high-strength aramid fibres bonded with high-grade nitrile (NBR) rubber.
Color: 7900 – Off-White
7925 – Light Green
7950 – Blue
Fiber: Aramid-Inorganic
Binder: NBR
Temperature:
Min: -100°F (-73°C)
Max: 700°F (371°C)
Continuous, max: 500°F (260°C)
Pressure, max: 1200 psi (83 bar)
Density: 1.7 g/cm (106 lbs./ft3)
Compressibility, ASTM F36: 7-17%
Recovery ASTM F36: 40%
Creep Relaxation: 20%
Tensile Strength, ASTM F152: 1600 psi (11 MPa)
Sealability, cc/min, ml/hr
ASTM F2378 (Nitrogen): 0.05
ASTM F37 (Fuel A): 0.03
ASTM F37 (Nitrogen): 0.5
Fluid Resistance - ASTM F146, IRM 903 oil, 5 hrs at 300°F (149°C)
Thickness Increase: 0-15%
Weight Increase: 15%
ASTM Fuel B 5 hrs at 70°F (21°C)
Thickness Increase: 0-10%
Weight Increase: 12%
Flexibility, ASTM F147: 10x
Gasket Factors:
THICKNESS: 1/16"
m: 3.0
Y psi (MPa): 3347 (23.1)
Gb psi (MPa): 497 (3.4)
a: 0.226
Gs psi (MPa): 3 (0.02)
THICKNESS:1/8"
m: 3.2
Y psi (MPa): 3385 (23.3)
Gb psi (MPa): 486 (3.4)
a: 0.276
Gs psi (MPa): 0.4 (0.003)
7925 – Light Green
7950 – Blue
Fiber: Aramid-Inorganic
Binder: NBR
Temperature:
Min: -100°F (-73°C)
Max: 700°F (371°C)
Continuous, max: 500°F (260°C)
Pressure, max: 1200 psi (83 bar)
Density: 1.7 g/cm (106 lbs./ft3)
Compressibility, ASTM F36: 7-17%
Recovery ASTM F36: 40%
Creep Relaxation: 20%
Tensile Strength, ASTM F152: 1600 psi (11 MPa)
Sealability, cc/min, ml/hr
ASTM F2378 (Nitrogen): 0.05
ASTM F37 (Fuel A): 0.03
ASTM F37 (Nitrogen): 0.5
Fluid Resistance - ASTM F146, IRM 903 oil, 5 hrs at 300°F (149°C)
Thickness Increase: 0-15%
Weight Increase: 15%
ASTM Fuel B 5 hrs at 70°F (21°C)
Thickness Increase: 0-10%
Weight Increase: 12%
Flexibility, ASTM F147: 10x
Gasket Factors:
THICKNESS: 1/16"
m: 3.0
Y psi (MPa): 3347 (23.1)
Gb psi (MPa): 497 (3.4)
a: 0.226
Gs psi (MPa): 3 (0.02)
THICKNESS:1/8"
m: 3.2
Y psi (MPa): 3385 (23.3)
Gb psi (MPa): 486 (3.4)
a: 0.276
Gs psi (MPa): 0.4 (0.003)
Navy Adhesion Test, California Proposition 65, RoHS Reach Declaration
