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cc/min.LeakRate � GYLON Style 3545 Configuration WINNER Chemical Processings VAALER AWARD Microcellular Benefits PTFE Tighterseal Highly compressible PTFE outer layers seal under low bolt load--suitable for many flat face and glass-lined flanges* Rigid PTFE Compressible layers conform to surface irregularities, especially on warped, pitted or scratched flanges Rigid PTFE core reduces cold flow and creep normally associated with conventional PTFE gaskets Microcellular PTFE Excellentchemicalcompatibility Pure PTFE withstands a wide range of chemicals Cross-sectional view under electron microscope � All layers manufactured using proprietary GYLON Easytocutandinstall process--thermally fused layers, without the use of Soft PTFE can be cut easily from larger sheets, reduc- BoltLoadRetainedpsi(bar)�adhesives ing inventory costs and expensive downtime Rigid PTFE core facilitates installation, especially on Media large diameter flanges and hard-to-reach areas GYLON�3540: Strong caustics, strong acids, hydro- carbons, chlorine, cryogenics, and � glass-lined equipment. Conforms GYLON Style 3540 to FDA regulations. � Pure microcellular PTFE GYLON 3545: Strong caustics, strong acids, hydro- carbons, chlorine and cryogenics. Similar to Style 3545, but without rigid core Conforms to FDA regulations. Ideal for wavy, warped, pitted, or scratched flanges, and for many types of flat face* flanges DIN 52913 Gasket Bolt Load vs. Time 7500 Test Results (53.5) 6000 (42) DIN 3535 Gasket Permeation Test 4500 (31.5) 0.16 3000 0.14 (21) 0.12 1500 (10.5) 0.10 0 0.08 0 2 4 6 8 10 12 14 16 0.06 Hoursat500�F(260�C) GYLON�3540 ExpandedPTFE 0.04 GYLON�3545 SkivedPTFE 0.02 � High bolt load retention of GYLON 3540 and 3545, especially at high tem- 0 � � peratures, indicates gasket is less likely to incur gross leakage (blowout). Expanded GYLON GYLON PTFE 3540 3545 * For flat face flanges, a minimum compressive stress of 1,500 psi (103 � Note the dramatically reduced leakage of GYLON 3540 and 3545. N/mm2) is recommended on the contacted gasket area for 150 psig Average of three tests, using 580 psig nitrogen with 4,640 psi gasket load(10.3 N/mm2) liquid service. Consult with the flange manufacturer to according to DIN 3535 requirements. All samples 1/16" (1.6 mm) thick. confirm that adequate compressive stress is available. C-14
Goodyear Rubber Products
