VALQUA No. 6503

White Compressed Non-Asbestos Fiber Sheet

Compressed Non-Asbestos Fiber Sheets are rolled and vulcanized sheet type gasket materials, in which special rubber binders and a small amount of filler material are mixed with organic and inorganic fibers.

Since black components are removed in the Compressed Fiber Sheet, these gaskets are suitable to be used for applications where inclusion of black foreign substances into the fluid should be avoided.



Unsuitable fluids Strong acid, strong alkali, and various solvents, inflammable gas, gas susceptible to burn and toxic gas
Applications Applications should be avoided in which black foreign substances are included into process fluids, such as in petrochemical industry
Dimensions Width × Length (mm): 1270 × 1270、1270 × 3810、2540 × 3810、3048 × 3810
Thickness (mm): 0.5、0.8、1.0、1.5、2.0、3.0
Color type: white
Print color: green

Design Data

  • Recommended tightening stress
    Tightening stress is defined as the pressure required under standard conditions without consideration to the opening force due to internal fluid.

    Fluid Recommended tightening stress (MPa)
    Liquid 25.5
    Gas 40.0
  • Available ranges
    Temperature and pressure classifications show individual service limits.

    VALQUA No. Temperature (°C) Pressure (MPa)
    Water based Oil based(2) Gas
    6500 / 6500AC -50~183 3.0 3.0 1.0
    6502 / 6503 / 6503AC -50~214 3.0 3.0 1.0

    (1) For service conditions exceeding 100°C, please consult us.
    (2) Regarding oil gas, solvent and corrosive fluid, separate consultation is required.

  • m,y values
    The m, y values for Compressed Fiber Sheets defined in Appendix G of JIS B 8265 can be applied to the m, y values of High Performance Non-Asbestos Sheets.

    Gasket factor
    Minimum design seating stress
    3.0 2.00 11.0
    1.5 2.75 25.5
    1.0 3.50 44.8
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