DARPack
is a line of premium, high temperature gasket sheet, made from
synthetic fibers and an elastomeric binder. For more
details on each style, review the chart below.
Compressed
Non-Asbestos
Sheet
DARPak Style
Green
White
Blue
Carbon
W.I.
Black
Binder
NBR
SBR
NBR
NBR
NBR
Density (lb/cubic
ft)
112
112
112
105
112
Maximum Service
Temperature
750°
750°
750°
850°
750°
Maximum
Service Pressure (psi)
1400 psi
1400 psi
1400 psi
1450
psi
1475 psi
Compressibility
@ 5000 psi (%)
7-15%
7-17%
7-15%
7-17%
7-17%
Recovery
Minimum (%)
50%
50%
50%
60%
50%
Creep
Relaxation ASTM F38B (max%)
20%
20%
20%
19%
20%
Tensile
Strength - ASTM F152 (against the grain)
2800
2800
2800
2390
5000
Thickness
Increase (max%) ASTM F146 (ASTM Oil #3)
0-8%
25-30%
0-8%
0-5%
0-7%
Weight
Increase (max%) ASTM F146 (ASTM Oil Fuel B)
10%
25%
10%
15%
15%
Thickness
Increase (max%) ASTM F146 (ASTM Oil Fuel B)