NAM 37C Compressed Fiber Gasketing Material
Material Composition and Application
Made from aramid fiber, mineral fiber & inorganic fillers NAM-37C is a premium quality gasket material designed for specifi c use for sealing water treatment equipment and distribution systems required to comply with NSF/ANSI 61: Drinking Water System Components – Health Eff ects by most governmental agencies that regulate drinking water supplies.
NAM-37C is also suitable for steam, oil, mild alkalis and acids, hydrocarbons and solvents making it an excellent multipurpose sealing material.
Available in:
- Sheets – 60” x 60” and 60” x 120” in thickness 1/64” to 1/4”
- Gaskets – Raised Face, Full Face and Specials
- Color – Green
| Peak Temperature | 572°F (300°C) |
| Continuous Temperature | 428°F (220°C) |
| Continuous Temperature with steam | 572°F (300°C) |
| Operating Pressure | 1137 PSI (80 Kg / cm2) |
| M Value | 2.5 (N/mm²) |
| Y Value | 25 (N/mm²) |
| ASTM Line Callout | F104F712122A9B4E12M4 |
The m = maintenance factor which provides the additional pre-load needed in the flange fasteners to maintain the compressive load on gasket after internal pressure applied to a joint. The y= minimum design seating stress on the contact area of the gasket that is required to provide a seal at an internal pressure of 0.14 bar Y=W/A1, where W is total fastener force in N and A1 is gasket area in mm².
| PROPERTIES (Test Specimen Thickness 2.0mm)) | TEST METHOD | UNIT | SPECIFIED VALUE |
|---|---|---|---|
| Density | — | gm / cm3 | 1.70 – 2.10 |
| Tensile Strength | — | — | — |
| (a) ACC to ASTM F152 (Across Grain) | — | N / mm2 | 8 Min. |
| (b) ACC to DIN52910 (Across Grain) | — | N / mm2 | 5 Min. |
| Compressibility | ASTM F36A | % | 5 – 15 |
| Recovery | ASTM F36A | % | > 50 |
| Fluid Absorption | — | — | — |
| (a) In ASTM Oil No. 3 | ASTM F 146 | — | — |
| INCREASE in Mass | — | % | < 15 |
| INCREASE in Thickness | — | % | < 10 |
| (b) In Fuel B | ASTM F 146 | — | — |
| INCREASE in Mass | — | % | < 10 |
| INCREASE in Thickness | — | % | < 10 |
| (c) In Water/Antifreeze | ASTM F 146 | — | — |
| INCREASE in Mass | — | % | < 15 |
| INCREASE in Thickness | — | % | < 15 |
| Ignition Loss | DIN 52911 | % | < 30 |
| Dielectric Strength | ASTM D149 | KV/MM | 8.3 |
| Surface Area Volume Ratio | NSF/ANSI 61 | SQ. IN./L | 2.0 |