VALQUA No. 6500

Compressed Non-Asbestos Fiber Sheet for general use

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.

These are suitable to be used as Non-asbestos gaskets for pipe flanges and equipment in various industries. The adaptability of these sheets for water apparatus has been confirmed based on JIS S 3200-7.



Unsuitable fluids Strong acid, strong alkali, and various solvents, inflammable gas, gas susceptible to burn and toxic gas
Applications Pipe flanges, valve bonnets and other equipment used in various industries including oil refineries, chemical industries and shipyards
Dimensions Width × Length (mm): 1270 × 1270、1270 × 3810、2540 × 3810、3048 × 3810
Thickness (mm): 0.4、0.5、0.8、1.0、1.5、2.0、3.0
Color type: blue
Print color: black

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 Compressed Non-Asbestos Fiber 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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