Frenzelit Compressed Gasket Sheet
Style 7075 - NOVATEC 825F Engineered Graphite
NOVATEC 825F compressed gasket sheet made with 75% pure graphite. It is easily identified by the cranberry colored "easy release" non-stick coating. This material's 45% compressibility allows for better sealing for those less than perfect flanges. This material does not cold flow when compressed with excessive torque. It likes stress and performs its best when compressed to 5000 PSI and beyond. This is an excellent steam sheet that works best in flanges.
An excellent steam sheet that works best in flanges
High temperature sealing applications
ASTM F 104 (Tests with 1/32" Thickness)
F 38 B Creep Relaxation
22 Hrs @ 212°F (100°C): 15%
22 Hrs @ 392°F (200°C): 35%
F 37 A Sealability
Fuel A @ 14.5 PSI/Gasket Load 1000 PSI: 0.25 ml/hr
F 37 B Sealability
Fuel A @ 9.8 PSI/Gasket Load 500 PSI: 0.5 ml/hr
Nitrogen @ 30 PSI/Gasket Load 3000 PSI: 0.1 ml/min
F 146 Thickness Increase
Oil #3, 5 Hrs @ 300°F: < 3%
Fuel B, 5 Hrs @ 73°F: < 4%
F 36 A Compressibility
@ 5000 PSI Gasket Load: 45%
Recovery: 10%
DIN 3535 Part 6 Gas Permeability
Nitrogen @ 580 PSI/Gasket Load 4640 PSI: 2 cc/min
DIN 52913 Stress Relaxation @ 7250 PSI
16 Hrs @ 347°F: Stress Retained > 6500 PSI
16 Hrs @ 572°F: Stress Retained > 5000 PSI
DIN 3754 48 Hrs @ 75°F Thickness Increase
H2S04 Sulfuric Acid 65% Concentration: 7%
NaOH Sodium Hydroxide 25% Concentration: 3%