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APG's C-4509 - Carbon Fibers and Special Heat-Resistant Additive Sheets with Nitrile Binder is a special high-pressure gasket material that offers excellent service in many sectors of the chemical industry. Main fields of application: alkaline media and steam. The expanded metal reinforcement is a galvanized low carbon steel insert which increases the compressive strength and pressure capability. Suitable for high-pressure applications because of its higher resistance against blowouts. This material is manufactured with carbon fibers and special high-temperature resistance additives and reinforced with a nitrile binder.
Benefits & Features
Benefits
Suitable for high-pressure applications
Higher resistance against blow-outs
More safety at high internal pressures
Features
Utilization of carbon fibers
Expanded metal reinforcement
Improved stress relaxation
Product Specifications
Typical Values Refer to 1/16'' Thick Material Unless Noted
| Creep relaxation ASTM F38B (1/32") | 20 % |
| Compressibility ASTM F36J | 8 - 14 % |
| Recovery ASTM F36J | 50 % minimum |
| KLINGER Hot Compression Test | |
| 1 Thickness Decrease 73øF (23øC) | 1 10 % initial |
| 2 Thickness Decrease 572ø F (300øC) | 2 8 % additional |
| Weight increase ASTM F146 after immersion in | |
| Fuel B, 5h/73øF (23øC) | 10 % maximum |
| Thickness Increase ASTM F146 after immersion in | |
| 1 ASTM Oil IRM 901, 5h/300øF (149øC) | 1 0 - 5 % |
| 2 ASTM Oil IRM 903, 5h/300øF (149øC) | 2 0 - 3 % |
| 3 ASTM Fuel A, 5h/73øF (23øC) | 3 0 - 5 % |
| 4 ASTM Fuel B, 5h/73øF (23øC) | 4 0 - 5 % |
| Density ASTM F1315 | 125 lb/ft (2.0 g/cc) |
| ASTM F104 Line Call Out | F712112B3E11M8 |
| Color | Black |
Pressure/Temperature Graphs
The pressure/temperature graphs shown are the most current method of determining the suitability of a gasket material in a known environment. However, chemical compatibility must also be considered.
pT diagram for thickness 1/16":
Gases & Steam
Liquids
In area 1 the gasket material is suitable using common installment practices subject to chemical compatibility
In area 2 appropriate measures are necessary for installation of the gasket to ensure maximum performance.
In area 3 do not install gaskets in these applications without first contacting APG for technical support service.
