Gasket Type METAGRAPH – ER
Description
Seal made from reinforced graphite sheet grater: ns. METAGRAPH G reinforced with a metal eyeleted internal, external or both sp.0.10 mm. To enhance the sealing performance. The metal piping, in fact prevent the erosion of the seal preventing the infiltration of graphite foil and allowing them to retain the mechanical properties and a significant reduction of fugitive emissions.
Applications
Chemical, petrochemical, exhaust systems, thermal power stations, valves, pipes, food industries etc.. and in harsh automotive resisting high mechanical and physical properties.
DIN3754
1,2 g/Cm3
Max. work range temperature
650°C
with air or oxidizing substance
450°C
Inert fluid but with coupling exposed to air
550°C
Environment of the joint fluid and inert
800°C
Maximum pressure of security in continuous operation
160 bar
Compressibility
ASTM F 36
35%
Elasticity
ASTM F36
15 / 20 %
Stress retention
DIN52913
48%
Stress relaxation a 400°C
BSI F 125
< 5
Resistance to crushing σvo(RT)
DIN 28090
160 N/mm2
Resistance to crushing σBo (300°C)
DIN 28090
140 N/mm2
Tensile strenght (min.)
ASTM F 104
25 N/mm2
Permeabiity to nitrogen 40 bar, RT
DIN 3535/4
< 0,6 ml/min.
Carbon content
99%
Leachable chloride content
≤ 50 ppm
Leachable fluoride content
≤ 50 ppm
Factors Clamping ROTT test / ASTM / ASME code
Gb
9.7 N/mm2
a
0,324
Gs
0,00007N/mm2
*The data listed depend on a variety of factors (state of the joints, dimensions, clamping, thermal and mechanical shock etc.) To which can be indicated for orientation purpose.
