PTFE/GRAPHITE GASKET PTG-90 Stick PTFE film on both sides of expanded graphite sheet or reinforced graphite gaskets. Cut it into different size as customers request. It has excellent corrosion resistance and compression resilient.  Even under very low Pre-tightening torque, still have excellent sealbility. Special for hot press oil, LNG, LN2, and strong acid and alkali, etc. media.      Code No            Insert      Material (N/mm2)      DIN 52913      Stability Under      Compressive Stress Temperaure(℃) %      ASTM F36A-66      Compressibility %      ASTM F36A-66      Recovery cm2/min      DN3535Gas Permeability      (Thickness 1.5mm) (F-37B)      Sealability      ( Thickness 1.5mm) ASTM      Sealing Constants      ml/hr      N2 A ml/hr      Buring oil A factor stress      psi PTG-90      Pure Graphite Gasket ≥30 -240-280 40-50 15-30 ≤0.4 30 ＜0.5 2.0 900 PTG-90(R)      Reinforced Graphite Gasket ≥45 -240-280 35-45 15-25 ≤0.4 30 ＜0.5 2.5 4000