Kammprofile gaskets and metal toothed gaskets are closely related types of metallic gaskets, but they are not exactly the same product. They share a similar structural concept — both use a serrated metal sealing surface — yet differ in composition, performance, and application.
Here’s a detailed comparison in English:
Structure:
Made from a solid metal core (typically stainless steel, carbon steel, or nickel alloy) machined with concentric serrated grooves on both sealing faces.
The grooved core is then covered on both sides with a soft sealing layer, usually graphite, PTFE, or mica.
When compressed, the soft layer fills flange imperfections while the serrated metal core provides structural strength and resilience.
Characteristics:
Combines the strength of a metallic gasket with the tight sealing capability of a soft gasket.
Excellent recovery and reusability — the metal core can often be reused with new facing layers.
Requires lower bolt load compared to solid metal gaskets while maintaining high sealing performance.
Applications:
Suitable for high-temperature, high-pressure, and fluctuating service conditions.
Commonly used in refineries, petrochemical plants, power generation, and equipment maintenance.
Typical Standards:
EN 13555, ASME B16.20.
Structure:
Manufactured entirely from metal — without any soft facing layer.
Sealing surfaces are machined with concentric or spiral serrations.
The gasket seals through the plastic deformation of the metal teeth against the flange surface.
Characteristics:
All-metal construction provides excellent resistance to high temperature, high pressure, and corrosion.
Requires a very high bolt load to achieve an effective seal.
Not suitable for flanges with surface irregularities or lower load capacity.
Offers good durability but less sealing flexibility than a Kammprofile gasket.
Applications:
Used in extreme service conditions, such as high-pressure steam, hydrogen, and oil & gas systems.
Typically applied in metal-to-metal sealing or as RTJ (Ring Type Joint) alternatives.
| Feature | Kammprofile Gasket | Metal Toothed Gasket |
|---|---|---|
| Construction | Metal core + soft sealing layer (graphite/PTFE, etc.) | All-metal, no soft facing |
| Sealing Mechanism | Grooved metal provides support; soft layer ensures a tight seal | Serrations plastically deform to form a metal-to-metal seal |
| Required Load | Moderate | Very high |
| Sealing Performance | Excellent; adaptable to flange conditions | Stable but less forgiving |
| Reusability | High (core reusable, facing replaceable) | Low (typically single-use) |
| Applications | General industrial, refinery, chemical, and power | Extreme high-pressure, high-temperature services |
| Standardization | ASME B16.20, EN 13555 | Usually manufacturer-specific |
