Corrugated Double Jacketed Gasket

Corrugated Double Jacketed Gasket

Core Features

  • Enhanced Sealability Geometry: Features a metallic jacket that has been precision-corrugated (ribbed) to create a series of concentric high-pressure “sealing points” across the flange face.
  • Reduced Seating Stress: The corrugated profile concentrates the bolt load onto the peaks of the ribs, allowing for a gas-tight seal at significantly lower torque than a standard flat-faced double jacket gasket.
  • Internal Soft Filler Core: Typically filled with high-purity flexible graphite or ceramic fiber, providing the necessary “spring-back” and thermal resilience for high-temperature service.
  • Excellent Thermal Cycling Recovery: The “bellows” effect of the corrugated jacket allows the gasket to expand and contract with the flange during rapid temperature fluctuations.
  • High-Temperature Performance: Depending on the metal selected (e.g., Stainless Steel, Inconel, or Monel), these gaskets can reliably operate in environments up to 1000°C.
  • Blow-out Security: The double-overlap construction of the metal jacket completely encapsulates the filler, providing a physical barrier against high-pressure surges.

At Kriloha Ltd., we recognize that in heavy industry, “static” conditions are a myth. Heat exchangers and pressure vessels are constantly moving—expanding as they heat up and contracting as they cool. A standard flat gasket often fails during these cycles because it lacks the “memory” to follow the flange. The Kriloha Corrugated Double Jacketed Gasket is engineered specifically to solve this “thermal lag.” As the top supplier of high-performance rubber seals and gaskets, Kriloha Gaskets has combined the structural strength of a jacketed seal with the mechanical flexibility of a corrugated profile.

The secret to this gasket’s success is its “Point-Contact” physics. In a standard flat double jacket gasket, the bolt load is spread across the entire surface area. In the Kriloha Corrugated version, the load is focused on the peaks of the corrugations. This creates a massive localized seating stress, allowing the metal to “bite” into the flange imperfections even if the bolts aren’t tightened to extreme levels. Inside the jacket, we use a high-purity Expanded Graphite filler. When compressed, this filler acts like a high-tension spring, pushing back against the corrugated walls and maintaining the “rib” pressure even as the flange moves.

Manufacturing these gaskets requires the highest level of metallurgical precision. At Kriloha, we utilize a proprietary Cold-Forming process to create the corrugations, ensuring the metal jacket (typically 0.4mm or 0.5mm thick) does not become brittle or cracked during shaping. We can integrate complex pass-partition bars for heat exchangers, ensuring every rib is perfectly aligned with the flange faces. Whether you choose 316L Stainless Steel for corrosion resistance or Soft Iron for cost-effective steam service, Kriloha ensures every gasket is batch-tested for rib height and filler density. By choosing Kriloha Ltd., you are moving beyond simple containment and investing in a dynamic sealing technology that adapts to the lifecycle of your equipment.

Primary Use Cases

  • Shell and Tube Heat Exchangers: Particularly those with fluctuating temperatures or “bad actor” flanges that struggle to seal with flat gaskets.
  • Gas Turbines & Turbochargers: Managing the intense heat and vibration of high-speed exhaust and intake systems.
  • Petrochemical Reactors: Ideal for high-pressure vessels where frequent thermal cycling occurs.
  • Steam Valve Bonnets: Providing a rugged, high-recovery seal for large-scale industrial steam valves.
  • Exhaust Manifolds: Used in heavy-duty marine and power-generation engines to handle thermal expansion.
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FAQs

Why is a corrugated jacket better than a flat jacket?

The corrugations allow the gasket to seal at a lower bolt load. It also provides better “recovery,” meaning it can maintain a seal more effectively during thermal expansion and contraction cycles.

Can this gasket be used on worn or pitted flanges?

Yes. The corrugated peaks provide a concentrated seal that is much more effective at filling pits and scratches than a flat-faced jacketed gasket.

What filler material does Kriloha recommend?

For most industrial applications up to 450°C, flexible graphite is the best choice due to its excellent sealability. For temperatures exceeding 500°C, we recommend ceramic or mica-based fillers.

Are these gaskets fire-safe?

Absolutely. Because the gasket is constructed entirely of metal and non-combustible mineral fillers, it is inherently fire-safe and will maintain its structural integrity during a fire event.

How do I specify the number of corrugations?

The number of ribs is usually determined by the width of the gasket. Kriloha’s engineering team calculates the optimal pitch and depth of the corrugations based on your flange dimensions and operating pressure to ensure maximum performance.

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