Durlon® 8400 Phenolic/NBR


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:

ColourGold
Fibre SystemPhenolic
BinderNBR
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