| Gasket Materials
>>> New non-asbestos BELPA® ACID ,
COMPRESSED GASKET MATERIAL FOR ACID AND ALKALI SERVICE |
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COMPOSITION
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Compressed non-asbestos gasket sheet
made on the basis of aramid and mineral fibres, combined with inorganic
fillers, reinforcing a special rubber formulation. The resulting
gasket sheet is recommended for use on a wide range of service conditions
with chemical resistance to many products including most of the
acids, oils, alkalis and solvents. The product has been designed
for use with the acid and alkali media most frequently found in
industry.
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| Technical
Data. |
| COLOUR |
WHITE |
| Standard sizes (mm) Other upon request |
2000 x 1500 |
| Standard thickness (mm). Other upon
request |
0.5 ;1; 1,5 ; 2 ; 3 |
| Density (±10%) |
1.65 g/cm3 |
| Compressibility ASTM F-36 A |
7-15% |
| Recovery ASTM F-36 A |
>45% |
| Gas permeability DIN 3535/6 |
< 1 cm3/min |
| THICKNESS INCREASE ASTM F-146 |
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| ASTM oil Nº1 5h 150ºC |
<4% |
| ASTM oil Nº3 5h 150ºC |
<8% |
| ASTM B 5h 150ºC |
<8% |
| H2SO4 ( 72%) 24 H/RT |
<4 % |
| HCl ( 18%) 24 H/RT |
<1.5 % |
| HNO3 ( 33%) 24 H/RT |
<1.5 % |
| Na(OH) ( 50%) 24 H/RT |
<2 % |
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| Typical properties for 2 mm thickness. |
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| PRESSURE-TEMPERATURE DIAGRAM |
P-T OPERATING GUIDELINES
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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.
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Good performance and long
service life of gaskets depend in large measure on fitting
and operation conditions, over which the manufacturer has
no control. The data given on this technical sheet should
not be used as application limits, but as guidance for an
appropriate choice. We can offer guarantees only for the quality
of our products.
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CREEP DEFORMATION / HOT CREEP TEST
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Temperature increase |
Fyesa laboratory |
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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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