Style 978-C is a dense, aramid / inorganic fiber reinforced, compressed, NBR sheet with special, high temperature, anti-stick parting agent applied to both sides
It’s high strength and excellent resistance to hot creep and broad chemical resistance make it an ideal high performance gasket material. 978-C can be used for gasketing in piping, machinery, equipment containing water, steam, petroleum based liquids, gases and mild acids or alkalines. It may also be used in most solvents excluding MEK and high aromatics. 978-C also has excellent sealability in ethylene glycol coolants and silicone fluids.
Black in color and manufactured using NBR/Aramid Fiber.
Has high tensile strength and excellent resistance to hot creep and a broad chemical resistance.
|Operating Limits** & Specifications|
|Max Pressure Rating (psi).||1000|
|Max Temp. Limit (°F)||700|
|Max Contin. Temp. Limit (°F)||400|
|Max P x T||500,000|
|y value (psi)||3000|
|ROTT Data||Gb = 1403
a = .337
Gs = .29
|ASTM F36 Compressibility (%)||7 – 17|
|ASTM F36 Recovery (% min)||40|
|ASTM F37 Sealability (ml/min) Sg = 1000 psi = 30||0.04|
|BS 7531 Gas Leakage (ml/min)||<1.0|
|ASTM F38 Creep Relaxation (%)||21|
|BS 7531 Residual Stress (mpa)||20.8|
|ASTM F146 Fuel B @ 70 – 85 °F Thickness Increase (%)||0 – 10|
|IRM 903 @ 300 °F Thickness Increase (%)||0 – 10|
|ASTM Fuel B @ 70 – 85 °F Weight Increase (%)||15 max.|
|ASTM F152 Average Tensile (psi)||2300|
Note: ASTM properties based on 1/16″ sheet thickness except ASTM F38, which is based on 1/32″ sheet thickness. This is a general guide only and should not be the sole means of accepting or rejecting this material. The data listed here falls within the normal range of product properties but should not be used to establish specification limits nor used alone as the basis of design.
Can be used for gasketing in piping, machinery, equipment containing water, steam, petroleum based liquids, gases and mild acids or alkalines.
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