Durlon<sup>®</sup> 9200 Barium Sulfate/PTFE

Durlon® 9200 Barium Sulfate/PTFE


Durlon® 9200 is a filled PTFE gasket material designed for use in aggressive chemicals. Including caustics, hydrogen peroxide, sodium hypochlorite, nitric acid, liquors and digester in pulp and paper service. Applications In the chemical, pharmaceutical and plastics industries include butadiene, hydrofluoric acid, vinyl chloride, methyl methacrylates, and styrene. It is also used extensively in railroad tankcar applications and can be used where resistance to highly aggressive chemicals is required. Style 9200 (granite white, branded) conforms to FDA requirements.

OXYGEN: Durlon® 9200 has been independently tested and certified by the Federal Institute for Materials Research and Testing, Berlin (BAM) for gaseous oxygen at pressures up to  40 bar (585 psi) and temperatures up to  200°C (392°F), and for service in liquid oxygen. Gaskets for oxygen service can be supplied from distributor stocks, providing proper cleaning procedures for oxygen service are followed before installation.

Note: That as a class, PTFE gasket materials are not recommended in liquid oxygen services where there is thermal cycling due to thermal shock and the difference of the coefficient of expansion between PTFE and steel.


Barium sulfate fillers are homogeneously blended with pure PTFE resins to give Durlon® 9200 its physical and mechanical properties. Independent testing has shown the fillers in Durlon® 9200 to be more evenly dispersed than filled PTFE with layered construction. The result is more consistent physical and mechanical properties without the voids, separation and chemical compatibility problems found in layered filled PTFE. It is suitable for use in steel flanges, will not exhibit the cold flow problems associated with virgin or generic skived PTFE or the hardness problems of some other filled PTFE products. It has excellent sealability, cuts easily and separates cleanly from flanges after use.

Typical Physical Properties:

Colour Granite White (standard)
Filler System Barium Sulfate
Max, continuous
-212°C (-350°F)
271°C (520°F)
260°C (500°F)
Pressure, max, bar (psi) 103 (1,500)
Density, g/cc (lbs/ft3) 2.5 (156)
Compressibility, %
Recovery, %
Creep Relaxation, %
Tensile Strength
ASTM F152, MPa (psi)
13.2 (1,920)
Nitrogen Sealability, cc/min
ASTM F2378
Gasket Factors
Y, psi
Gb, MPa (psi)
Gs, MPa (psi)
1/16″               1/8″
1.5                   4.2
952 (6.5)          827 (5.7)
153 (1.1)          96 (0.66)
0.360                0.437
15 (0.1)            14 (0.1)
 TA-Luft (VDI Guideline 2440) Approved:
temperature of exposure:
period of exposure:
test pressure (helium):
leak rate:
period leak rate measured:
200°C (392°F)
1 bar (14.5 psig)
1.89-E mbar*(m*s)
BAM – Oxygen Testing
a) Gaseous oxygen:
b) Liquid oxygen:
Up to 52 bar (754 psig)
and 260°C (500°F)
FDA Conforms to the requirements of 21 CFR 177.1550 for food and drug contact
ABS-PDA Certificate American Bureau of Shipping

*ASTM Testing