Durlon® 8500 Aramid-Inorganic/NBR


Application:

Our workhorse material, DURLON® 8500 is excellent in steam, natural gas, soybean processing and with new generation refrigerants. A high quality general service gasket material for use in a wide range of services in pulp and paper, food, beverage, pharmaceutical, chemical, refinery, gas pipeline and general industry. DURLON® 8500 exhibits good compressibility and recovery, excellent sealability, flexibility and cutting characteristics.

Composition:

DURLON® 8500 contains high-strength aramid and inorganic fibres bonded with high-grade nitrile (NBR) rubber.

Fire Testing:

DURLON® 8500 has successfully passed the API 6FB fire test [avg. temperature >650°C, 30 mins, 40 bar, 1 ml (inch/min.) maximum allowable leakage].

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).

Typical Physical Properties:

ColourGreen
Fibre SystemAramid-Inorganic
BinderNBR
Temperature
Min
Max
Max, continuous
-73°C (-100°F)
371°C (700°F)
287°C (548°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
20
Tensile Strength across grain
ASTM F152, MPa (psi)
13.8 (2,000)
Fluid Resistance, ASTM F 146
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
10
Sealability,
ASTM F37 (Fuel A), ml/hr
ASTM F37 (Nitrogen), ml/hr
ASTM F2378 (Nitrogen), cc/min
0.01
0.4
0.03
Volume Resistivity, ohm-cm
ASTM D257
4.2 x 1013
Dielectric Breakdown, kV/mm (V/mil)
ASTM D149
11.7 (297)
Gasket Factors
m
Y, psi
Gb, psi
a
Gs, psi
1/16″ 1/8″
2.7 4.2
2,359 (16.3) 2,931 (20.2)
650 (4.5) 400 (2.8)
0.330 0.350
200 (1.4) 20 (0.1)
Flexibility
ASTM F147
10x