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Aramid/Inorganic with SBR Rubber Binder

DuraSwell 7760 Sheet

Compressed Asbestos Free Gasket Material

ASTM F104: F729990-B5E09L100M9
DuraSwell-logo.png

DuraSwell was engineered for demanding applications that require superior sealability, conformity to flange surfaces, and recovery. This gasket material is designed to react by a controlled swell when in contact with oils and fuels.

This swelling property helps increase gasket stress in applications that require increased gasket loading that may have otherwise been limited due to insufficient bolting or flange design factors. Applications include fuel systems, pulp and paper tall oils, oils, coolants and heavy duty equipment applications such as oil pan covers, gear case and flywheel housings.

Anti-Stick Properties:

The anti-stick release agents of all compressed Durlon® products has improved as a result of decades of research and development. All Durlon® compressed gasket materials have passed the MIL-G-24696B Navy Adhesion Test (366°F/48 hrs).

Cutability:

All Durlon® products are known for superior cutability and flexibility resulting in clean cuts and perfect fit.

Typical Properties:

Color Off-White
Fiber System Synthetic
Binder Proprietary Blend SBR
Temperature
   Min
   Max
   Continuous Max

-100°F (-73°C)
650°F (344°C)
400°F (205°C)
Pressure
   Max, bar (psi)
   Continuous, bar (psi)

69 (1000)
34.5 (500)
Density, g/cc (lbs/ft3)
   ASTM F1315
1.65 (103)
Compressibility, %
   ASTM F36
7-17
Recovery, %
   ASTM F36
50
Creep Relaxation, %
   ASTM F38
< 30
Tensile Strength, MPa (psi)
   ASTM F152
14.8 (2,100)
Fluid Resistance, ASTM F146
IRM 903 Oil 5hrs at 300°F
   Thickness Increase, %
   Weight Increase, %
ASTM Oil #1 5hrs at 70°F
   Thickness Increase, %
   Weight Increase, %


< 75
< 50

15-30
< 30
Nitrogen Sealability, cc/min
   ASTM 2378
0.01
Flexibility
   ASTM F147
4x
Note: ASTM properties are 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 specifications limits nor used alone as the basis of design. For applications above Class 300, contact our technical department.

M&Y AND PROPOSED ASTM GASKET CONSTANTS:

THICKNESS 1/16"
M
Y psi 
6.9
2412

Gasket Constants
Gb psi (MPa)
a
Gs psi (MPa)


95 (0.655)
0.609
0.4 (0.027)
*Gasket Constants based on proposed ASTM Draft 10.1