Durlon® 9000/9000N is used extensively in chemical, pulp and paper, food and beverage, and the railroad tankcar industries. It has been tested and approved for liquid chlorine, caustics, gaseous oxygen, and high purity applications in the pharmaceutical industry (9000N, blood components manufacturing). Durlon® 9000 and 9000N are designed for applications where resistance to highly aggressive chemicals is required. Available in unpigmented white as style 9000N. Both styles 9000 and 9000N, (including branding) conform to FDA requirements.
Durlon® 9000 has been proven through the "Test Protocol" of the Chlorine Institute and is listed as an acceptable gasket material for Dry Chlorine service (both liquid and gaseous) in Pamphlet 95, Edition 3 of the Chlorine Institute. Additionally, Durlon® 9000 was independently tested and approved for Caustics service by a major chemical/chlorine manufacturer. Unlike generic glass fiber filled PTFE gaskets, the shape of the fillers used in Durlon® 9000 do not allow wicking which can cause corrosion on flange faces.
Durlon® 9000/9000N has been independently tested and certified (BAM) for oxygen service at pressures up to 585 psi (40 bar) and temperatures up to 392°F (200ºC), and for service in gaseous oxygen. Gaskets for gaseous oxygen service can be supplied from distributor stocks, providing proper cleaning procedures for gaseous oxygen service are followed before installation.
Passed API 6FA Fire Test: A bolted 6” Class 300 test fixture with Durlon® 9000 was subjected to an external flame for 30 minutes followed by a 10 minute cool down during which the flame temperature averaged 875°C (1607°F) with the test fixture at or above 650°C (1202°F) for 19.8 minutes. This was followed by a 5 minute post-burn test, and then a 5 minute operational test with the system depressurized then repressurized (547 psig avg.). Leakage during each test phase was significantly below the test allowables.
Various shapes of inorganic fillers have been homogeneously blended with pure PTFE resins to give Durlon® 9000 its physical and mechanical properties. It is suitable for use in steel flanges and will not exhibit the cold flow problems associated with virgin PTFE or the hardness problems of some other filled PTFE gasket products. It cuts easily and separates cleanly from flanges after use.