Kriloha Premium Graphite-Mica Spiral Wound Gasket

Kriloha Premium Graphite-Mica Spiral Wound Gasket

Core Features

  • Advanced High-Temp Hybrid Filler: This specialized gasket utilizes a combination of High-Purity Flexible Graphite and Phlogopite Mica. While graphite provides superior sealing and compressibility, the mica layer acts as an oxidation barrier, significantly extending the service life in high-heat environments.
  • Thermal Oxidation Resistance: Standard graphite gaskets begin to oxidize (burn off) at approximately +450°C. The integration of Mica allows this hybrid gasket to maintain its structural integrity in oxidizing atmospheres up to +700°C and even higher in non-oxidizing environments.
  • Dynamic Recovery: The V-shaped metallic winding (usually 316L Stainless Steel or Inconel) acts as a spring, allowing the gasket to “breathe” with the flange during thermal cycling and pressure surges.
  • Chemical Versatility: Highly resistant to a vast range of media, including superheated steam, hydrocarbons, exhaust gases, and aggressive chemicals across a pH range of 0–14.
  • Anti-Stick Properties: The mica component reduces the tendency of the graphite to bond to the flange face, making “shut-down” cleaning and gasket removal significantly faster and safer for the hardware.

At Kriloha Ltd., we recognize that “High Temperature” is the ultimate test of a gasket’s DNA. In environments exceeding +500°C, a standard seal doesn’t just leak—it disappears. The Kriloha Graphite-Mica Spiral Wound Gasket is our engineered answer for “Extreme-Thermal” containment. As a premier global provider of industrial seals, Kriloha Gaskets has mastered the Dual-Filler Winding technology required to fuse the compressibility of graphite with the thermal invincibility of mica.

The engineering of our Graphite-Mica series is based on Oxidation Shielding. By alternating layers of graphite and mica within the metal spiral, we create a “tortuous path” for oxygen. The mica layers prevent oxygen from reaching the graphite core, effectively stopping the “burn-away” effect that causes traditional gaskets to fail during long-term high-heat service. At Kriloha, we utilize Inconel 600 or 625 windings for these gaskets to match the extreme thermal limits of the filler.

Manufacturing these gaskets at Kriloha involves strict Winding Tension Calibration. We ensure the “Spring-Rate” of the metal spiral is perfectly balanced to provide maximum recovery without requiring excessive bolt loads. Whether you are sealing a high-pressure steam header or a gas turbine exhaust, Kriloha Graphite-Mica Spiral Wound Gaskets provide the mechanical invincibility and thermal agility your facility demands. By choosing Kriloha Ltd., you are investing in a “Thermal-Shield” technology that maximizes your equipment uptime in the harshest heat zones.

Primary Use Cases

  • Exhaust Gas Manifolds: Sealing high-temperature combustion gases in power generation and marine engines.
  • Steam Turbines & Superheaters: Handling high-pressure, high-temperature steam where standard graphite would degrade over time.
  • Refinery Fired Heaters: Used in heat transfer applications where temperatures frequently fluctuate above the oxidation threshold of pure graphite.
  • Chemical Processing: Sealing reactors and heat exchangers handling aggressive media at elevated temperatures.
  • Incineration Plants: Providing a reliable seal in flue gas and waste-heat recovery systems.

FAQs

  • Why not use 100% Mica?

Pure Mica is very brittle and has poor compressibility. By using a Graphite-Mica hybrid, we get the “soft” sealing benefits of graphite with the “hard” heat resistance of mica.

  • Does this gasket require a specific flange finish?

Yes. Like all spiral wound gaskets, a “Gramophone” or serrated finish (typically 125–250 µin Ra) is recommended to help the filler “bite” into the flange and prevent blowout.

  • Can I reuse a Spiral Wound Gasket?

No. Spiral wound gaskets are designed to permanently deform to the flange’s microscopic imperfections. Once compressed, the “spring” is set, and it will not provide a reliable seal if re-installed.

  • What is the maximum temperature for this gasket?

In most oxidizing atmospheres, it is rated for continuous service up to +700°C (1292°F). In steam or inert environments, it can handle even higher peaks.

  • How do I identify a Graphite-Mica gasket?

Standard ASME B16.20 color coding usually applies to the outer ring. For the filler, Kriloha identifies these by their characteristic “glittering” silver-grey appearance compared to the flat matte black of pure graphite.

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