HAAS - CATALOG 7.5 Página 366
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SEALING MATERIAL "OHA-SPECIAL" Tool-saving when punching / cutting Optimization of use thanks to a unique material profile OHA-Spezial can be easily further processed by means of the lubricating effect of the graphite portion and the non-existent metal inlays even with the simplest processes. Good thermal resistance at high temperatures up to 360° C OHA-Spezial combines the positive sealing properties of graphite and fibers. A very low binder content ensures the reliability and the highest operational safety of OHA-Spezial and reduces the costs of change and maintenance to a minimum - a worthwhile investment for plant safety. Enormous adaptability OHA-Spezial adapts perfectly to flange irregularities due to its material structure. This flexibility allows OHA-Spezial the use of old flanges - a contribution to cost reduction. Very high compressive strength OHA-Spezial provides constant safety over the entire revisions cycle through excellent long-term stability. The high stability and longevity of OHA-Spezial reduces the "maintenance intervals" - a further contribution to the cost reduction in the maintenance of your plants. Safe handling thanks to high flexibility OHA-Spezial is extremely flexible and break-proof thanks to the patented combination of graphite and fibers. Building problems are past. Large format seals from one piece OHA-Spezial does not require complex processing steps for special dimensions due to the available formats. Physical characteristics Test method Installation instructions Preparation of the sealing surfaces The sealing surfaces must be thoroughly cleaned of old sealing residues or other impurities before installing a new seal. Oils, greases and sealing pastes should be removed with suitable solvents. For cleaning only use scrapers or scratches which do not cause damage to the sealing surfaces. For round flange surfaces, have work performed in the circumferential direction, by angular surfaces in the longitudinal direction. Care must be taken to ensure that no grooves or gouging are inserted in a spoke-like manner. The sealing surfaces must be free of any mechanical damage. Care must be taken to ensure that no grooves or gouging are inserted in a spoke-like manner. The sealing surfaces must be free of any mechanical damage. Notches, scratches, corrosion damage and slags, etc., should be checked and possibly for planparallelism and ripple by reworking if necessary. Tolerances can not be recommended since the design conditions of the flange connections are very different. Installation of the seal The cool and dry stored gaskets must be checked for cracks, surface damage and dimensional accuracy before installation. Gaskets must only be used in the specified dimensions. In the unloaded and stressed state, they are not be allowed to get through into the sealed space. For perforated gaskets, the hole pattern must match that of the flange. If necessary, holes of the seal may only be enlarged with suitable tools (punches, cutting tools, etc.). Data 2,0 mm Unit Please do not use any additional sealing aids. These can lead to failure of the gasket. The pressure and Density DIN 53105 ca. 1,0 g/cm3 Compression ASTM F36J <50 % temperature limits can be Rebound ASTM F36J >5 % found in the corresponding diagrams. Compressive strength (50 N/mm; 16 h) 300° C DIN 52913 >30 N/mm2 Compressive strength (50 N/mm; 16 h) 175° C DIN 52914 >35 N/mm2 Cold upsetting values DIN 28 090-2 37 % Cold recovery values DIN 28 090-2 2,5 % Warm typeset value DIN 28 090-2 7 % Warm recovery value DIN 28 090-2 1 % Max. permissible surface pressure DIN 28 090-1 180 N/mm2 Specific leakage rate DIN 28 090-2 0,6 (mg/s*m) Increase in weight STM Oil 3 5h/150° C ASTM F146 <45 % Increase in weight Fuel B 3 5h/23° C ASTM F146 <40 % Increase in thickness ASTM Oil 3 5h/150° C ASTM F147 <2,0 % Increase in thickness Fuel B 5h/23° C ASTM F147 <2,0 % Illustrations, dimensions and descriptions are not binding. We reserve the right to make technical changes! All data are typical values. The transfer into a specification requires a separate agreement. Sealing material "OHA-Special" 16
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