Mineral Fiber Rubber Gasket

Mineral Fiber Rubber Gasket

Core Features

  • Inorganic Mineral Core: Manufactured from a high-density blend of heat-stable Mineral Fibers (such as Rockwool or Glass Microfibers) bonded with premium Nitrile (NBR) or SBR elastomers.
  • Superior Thermal Stability: Specifically engineered for high-heat applications where organic fibers might carbonize or degrade, providing a reliable seal up to +350°C for short-term spikes.
  • High Compressibility: The mineral fiber matrix is naturally more conformable than aramid-based synthetic fibers, allowing the gasket to seal more effectively on older, slightly irregular, or uneven flange faces.
  • Non-Asbestos Security: A safe, environmentally friendly alternative to traditional asbestos, offering comparable heat resistance and mechanical handling without health risks.
  • Controlled Swell & Recovery: Formulated to maintain its “spring-back” recovery after compression, ensuring the seal remains energized even during pressure fluctuations in the piping system.
  • Fire-Safe Properties: The inorganic nature of the mineral fibers provides an inherent resistance to ignition, making it a safer choice for general-purpose refinery and utility steam services.

At Kriloha Ltd., we recognize that not every high-heat application requires an expensive exotic alloy or pure graphite. For the vast majority of industrial utility services, what you need is a “Thermal Workhorse.” The Kriloha Mineral Fiber Rubber Gasket is engineered to fill the gap between standard synthetic gaskets and high-end metallic seals. As a premier global supplier of industrial seals, Kriloha Gaskets has optimized the fiber-to-binder ratio to ensure maximum heat resistance without sacrificing mechanical “toughness.”

The engineering of a Mineral Fiber gasket is centered on Inorganic Resilience. Unlike synthetic aramid fibers which can begin to lose strength at sustained high temperatures, mineral fibers are essentially “rock” in fibrous form. At Kriloha, we utilize a specialized Cross-Linking Vulcanization process to bond these fibers into a dense, non-porous sheet. This creates a tortuous path for gases and liquids, ensuring the gasket remains “tight” even when the rubber binder begins to age.

Manufacturing these gaskets at Kriloha involves precision Calendering under high-pressure rollers to ensure uniform thickness across the entire sheet. We offer these in various thicknesses, typically from 0.5mm to 3.0mm, and in specialized “Wire-Reinforced” grades for higher pressure steam. Whether you are managing a municipal steam grid or a chemical wash facility, Kriloha Mineral Fiber Rubber Gaskets provide the thermal stamina and cost-effective reliability your facility demands. By choosing Kriloha Ltd., you are investing in a product that balances the durability of mineral technology with the flexibility of modern elastomers.

Primary Use Cases

  • Low-to-Medium Pressure Steam: The preferred “utility-grade” gasket for saturated steam lines, condensate return systems, and boiler feed water.
  • Exhaust Systems & Manifolds: Providing a heat-resistant seal for industrial exhaust ducting and low-pressure engine manifolds.
  • Hot Water & Heating Loops: Ideal for large-scale district heating and commercial HVAC boilers where constant thermal cycling occurs.
  • General Chemical Service: Handling mild acids, alkalis, and neutral chemical solutions in industrial processing plants.
  • Valve & Pump Jackets: Used as a durable, conformable sealing element for heated equipment jackets and insulation covers.
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FAQs

How does Mineral Fiber compare to Synthetic (Aramid) Fiber?

Mineral fiber gaskets generally offer better heat resistance and are more compressible (softer), making them better for sealing uneven flanges. Synthetic fibers like Aramid are “tougher” and have higher tensile strength for high-pressure “blow-out” resistance.

Is this gasket safe for drinking water?

While primarily an industrial grade, specific versions bonded with EPDM can be supplied for water service. However, for potable water, Kriloha usually recommends our WRAS-approved EPDM or FDA-compliant PTFE gaskets.

What is the maximum pressure rating?

Standard mineral fiber gaskets are typically rated for pressures up to 40-50 Bar (approx. 600-700 PSI), depending on the operating temperature and the thickness of the gasket.

Can I use these on high-pressure steam?

For high-pressure or superheated steam, Kriloha recommends our Wire-Reinforced Mineral Fiber or Flexible Graphite gaskets. Standard mineral fiber is best suited for saturated steam and low-pressure utility lines.

How should these be stored?

Like all rubber-bonded products, they should be stored in a cool, dry place away from direct sunlight and ozone sources (like electric motors). When stored correctly, they have a shelf life of several years.

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