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Spiral Wound Gaskets
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When you have an application with high temperature variations, pressure disparities or flange rotation problems, gaskets with flexibility and recovery are critical. National Rubber's spiral wound gaskets are designed to meet these demanding requirements.
Spiral wound gaskets are ideal for use in sealing flange joints, manhole and handhold covers, tube covers, boilers, heat exchangers, pressure vessels, pumps, compressors and valves, as well as other high-temperature, high-pressure applications.
An industry standard for petrochemical, pharmaceutical, shipbuilding, pulp and paper, and food processing, plus the power industry and nuclear power stations.
Technical Details
Manufactured of alternate piles of pre-formed metal and a soft, non-metallic filler, spiral wound gaskets offer a precision-engineered, yet low cost solution that combines fire resistance and the ability to handle temperature and pressure fluctuations.
Specifically, these gaskets are manufactured by spirally winding a V-shaped metal strip and a strip of non-metallic filler material. The metal strip holds the filler, providing the gasket with mechanical resistance and resilience. The engineered shape of the metal strip acts as a spring under load, resulting in a very resilient seal under varying conditions.
The density of the spiral gasket can be varied to meet virtually any requirement. Plus, depending on the chemical compatibility requirements, the filler and winding material can be changed.
Performance Specifications
- •Employed for applications over 150-lb. pressure class
- •Can seal fluid pressures up to 250 bar (3625.9 psi)
- •Temperature resistance up to 1000°C (1832°F)
- •Manufactured to ASME B16.20 or customer specifications
- •ISO 9001:2008 certified manufacturing
Key Advantages
- ✓High reliability across wide stress range
- ✓Will not damage flange surfaces
- ✓Easy installation and removal
- ✓Non-adhesive design
- ✓Fire resistant construction
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Materials & Options
- Metals: 304/316 SS, Monel, Inconel, others
- Fillers: Graphite, PTFE, Ceramic, Mica
- Styles: Basic, with inner/outer rings, centering rings