Gasket Materials >>> BELPA® CSA 420, UNIVERSAL GASKET MATERIAL FOR GENERAL INDUSTRY & OEM
 



    CHEMICAL RESISTANCE CHARTS

· COMPOSITION
High quality compressed non asbestos fibre jointing sheets based on aramide and special mineral fibers mixed in a NBR rubber matrix. This material offers high stress relaxation
(Grade Y), high compressibility and low gas permeability, excellent characteristics for universal services. Material suitable for use with air, water, oils, hydrocarbons, gases and common uses. Particularly suitable for use in compressors, pumps, valves and OEM equipment.

Technical Data.
COLOUR Blue
Standard sizes (mm) Other upon request 1500 x 1500
Standard thickness (mm). Other upon request 0,5, 0.8, 1, 1,5, 2, 3
Density (± 10%) 1,65 g/cm³
Compressibility ASTM F-36A 7%-15%
Recovery ASTM F-36A >55%
Transverse tensile strength ASTM F-152 12 MPa
Gas permeability DIN 3535/6 <0,5 cm³/min
Hot creep at 200ºC x wsw/200 (%) 10-12
Cold compressibility x KSW (%) 11
Cold recovery x KRW (%) 3,5
Hot recovery at 200ºC x wsR/200 (%) 1,0
Thickness increase ASTM F-146 after:
Immersion in ASTM oil Nš1 5h 150ºC <3%
Immersion in ASTM oil Nš3 5h 150ºC <7%
Immersion in ASTM fuel B 5h 20ºC <8%

 
Typical properties for 2 mm thickness
   
PRESSURE-TEMPERATURE DIAGRAM P-T OPERATING GUIDELINES
1- Usually satisfactory to use without reference to Montero. Technical examination is normally unnecessary.

2- Must refer to Montero for advice. A technical examination is recommended

3- Area not recommended.

The P-T diagram helps the user or designer who often knows the operating temperature and pressure to carry out an initial selection of a suitable material . The P-T diagram cannot guarantee the suitability of a material for an application



  • CREEP DEFORMATION / HOT CREEP TEST
  • Temperature increase Fyesa laboratory
    Thickness decrease SEPTEMBER 2001

    CREEP DEFORMATION: percentage loss of thickness over a specified time under constant load, applied at a specified rate, at a specified temperature.
    Creep (%) = (loss of thickness under load at a specified time / initial thickness of the sample) x 100
    Creep deformation gives an indication of the effect of time and temperature on deformation behaviour of gaskets materials.
    This parameter also gives an indication about the trend of a gasket material to leak in combination with the variables that also affect to a flanged union

     
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