Durlon® 9400

Durlon® 9400 is a high performance filled PTFE gasket material designed for use in piping and equipment, chemical, and other general industrial applications where resistance to highly aggressive chemicals (including hydrofluoric acid) is required. Durlon® 9400 can also be used as the gasket of choice for anhydrous hydrogen fluoride (AHF) in railroad tank cars and a good alternative for use in plants where barium sulfate filled PTFE may not be suitable.

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Durlon® 9400 gasket material is a high performance filled PTFE designed for use in piping and equipment in chemical, pharmaceutical, food and other general industrial applications where resistance to highly aggressive chemicals (including hydrofluoric acid) is required. Style 9400 conforms to FDA requirements. It can also be used as gasketing for anhydrous hydrogen fluoride (AHF) in railroad tank cars and in plants as a material of construction where barium sulfate filled PTFE may not prove suitable.
Durlon® 9400 is made of pure PTFE resins combined with carbon fillers homogeneously dispersed throughout the compound. Durlon® 9400 does not exhibit the cold flow problems associated with virgin PTFE yet has excellent sealability, flexibility, non-sticking and cutting characteristics. Durlon® 9400 also demonstrates good electrical conducting properties.
Color Black
Filler System Carbon
Temp. Min.
Temp. Max.
Continuous, Max		 -212°C (-350°F)
288°C (550°F)
260°C (500°F)
Pressure, max, bar (psi) 103 (1,500)
Density, g/cc (lbs/ft3) 2.1 (131)
Compressibility, % 5-12
Recovery, % 40
Creep Relaxation, % 30
Tensile Strength, MPa (psi) 14.5 (2,100)
Sealability
ASTM 2378 (Nitrogen)		 0.01 cc/min
Volume Resistivity, ohm-cm ASTM D257 61
Dielectric Breakdown, ASTM D149, kV/mm (V/mil) 1 (33)

Note: ASTM properties 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 specification limits nor used alone as the basis of design.

*For applications above Class 300, consult your representative.

RoHS Reach Declaration Compliant
HFIPI – Materials of Construction Guideline Approved Material
1/16” 1/8”
m 6.8 –
Y psi (MPa) 2,765 (19.1) –
Gb psi (MPa) 1,701 (11.7) 1,412 (9.7)
a 0.173 0.164
Gs psi (MPa) 99 (0.68) 248 (1.7)