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      C-4408 - Aramid Fiber Sheets With Nitrile Binder

      Technical Sheet

      APG's C-4408 - Aramid Fiber Sheets with a Nitrile Binder is a universal high-pressure gasket material for industrial applications.

      This material has a low carbon steel woven mesh insert that improves stress relaxation and makes this material suitable for fluctuating temperatures and pressures.

      C-4408 has good resistance to oils, fuels, and hydrocarbons. This material is manufactured with aramid fiber reinforced with a nitrile binder.

      		 4408b

       

      Benefits & Features

      Benefits Features

      • Suitable for higher pressures

      • Resistant against blow-outs

      • More safety at high internal pressures

      • Wire Reinforcement 

      • Improved Stress Relaxation

      Product Specifications

      Typical Values Refer to 1/16'' Thick Material Unless Noted

      Creep relaxation ASTM F38B (1/32") 20 %
      Compressibility ASTM F36J 6 - 12 %
      Recovery ASTM F36J 50 % minimum
      KLINGER Hot Compression Test  
      1 Thickness Decrease 73°F (23°C) 1 12 % initial
      2 Thickness Decrease 572° F (300°C) 2 22 % additional
      Weight increase ASTM F146 after immersion in  
      Fuel B, 5h/73°F (23°C)
      		 10 % maximum
      Thickness Increase ASTM F146 after immersion in  
      1 ASTM Oil IRM 901, 5h/300°F (149°C)  1 0 - 5 % 
      2 ASTM Oil IRM 903, 5h/300°F (149°C) 2 0 - 5 %
      3 ASTM Fuel A, 5h/73°F (23°C) 3 0 - 5 %
      4 ASTM Fuel B, 5h/73°F (23°C) 4 0 - 5 %
      Density ASTM F1315 119 lb/ft ³ (1.9 g/cc ³)
      ASTM F104 Line Call Out F712112B3E11M6
      Color Black

       

      DOWNLOAD SPEC SHEET

       

      Pressure/Temperature Graphs

      The pressure/temperature graphs shown are the most current method of determining the suitability of a gasket material in a known environment. However, chemical compatibility must also be considered.

      pT diagram for thickness 1/16":

      Gases & Steam

      KLINGERSIL C-4408 Steam

      Liquids

      KLINGERSIL C-4408 Liquid (1)

      In area 1 the gasket material is suitable using common installment practices subject to chemical compatibility.
      In area 2 appropriate measures are necessary for installation of the gasket to ensure maximum performance.
      In area 3 do not install gaskets in these applications without first contacting APG for technical support service.