Kammprofile Gasket with Loose Outer Ring

At Kriloha Ltd., we understand that thermal expansion is the enemy of a perfect seal. In massive heat exchangers and high-pressure reactors, the metal of the flange and the metal of the gasket don’t always move at the same rate. This can lead to radial shearing and eventual leaks. The Kriloha Kammprofile Gasket with Loose Outer Ring is our engineered solution for these high-movement environments. As a premier global provider of industrial sealing technology, Kriloha Gaskets has designed this modular system to provide the highest degree of mechanical flexibility in the Kammprofile category.

The “Loose Ring” architecture is a strategic design choice. By separating the centering ring from the sealing core, we allow the core to act as an independent “spring.” The serrated core (the “Kammprofile”) features concentric grooves machined into both sides, which are then laminated with high-purity flexible graphite. When compressed, the graphite is forced into the grooves and the flange face simultaneously, creating multiple redundant high-pressure seals. Because the outer ring is not physically bound to the core, it stays perfectly centered in the bolt circle while the core manages the internal pressure and thermal loads.

Manufacturing these gaskets at Kriloha involves extreme precision. We ensure the clearance between the loose outer ring and the sealing core is calculated to allow for expansion without allowing the core to shift out of place. Our standard cores are produced from 316L Stainless Steel, though we offer exotic alloys like Monel, Titanium, and Inconel for highly corrosive or ultra-high-temperature service. By choosing Kriloha Ltd., you are investing in a modular sealing system that balances the structural strength of solid metal with the adaptive recovery required for modern, high-efficiency industrial processes.

Primary Use Cases

Large Diameter Heat Exchangers: The preferred choice for exchangers where thermal expansion differences between the shell and the gasket core are significant.
High-Pressure Steam Headers: Reliable sealing for power plant steam distribution where vibration and thermal shocks are common.
Chemical Reactors & Autoclaves: Providing a robust, pressure-energized seal for volatile chemical synthesis.
Piping with Frequent Maintenance: Ideal for joints that are opened often, as the core can be easily replaced or refurbished.
Large-Scale Manway Covers: Ensuring structural integrity and a leak-proof seal for heavy-duty pressure vessel openings.

FAQs

What is the benefit of a “Loose” ring over an “Integral” ring?

The loose ring allows for independent thermal expansion of the sealing core, which reduces radial stress on the seal. It also makes the gasket easier to refurbish, as the outer ring can often be reused.

Does the loose ring ever fall off during installation?

Kriloha uses a precision “groove-fit” or minimal tack-welding to ensure the ring stays with the core during shipping and handling, while still allowing for independent movement once the gasket is compressed between flanges.

What facing materials does Kriloha recommend?

For most steam and hydrocarbon applications up to 450°C, high-purity flexible graphite is the standard. For aggressive chemicals, we offer ePTFE, and for extreme heat (up to 1000°C), we utilize mica or ceramic-based facings.

Can I use this gasket on worn or pitted flanges?

Yes. The Kammprofile design is excellent for older flanges. The soft facing material is forced into surface imperfections by the serrated “teeth” of the core, creating a much better seal than a standard flat gasket.

How do I ensure the gasket is centered correctly?

The loose outer ring is specifically sized to sit against the flange bolts. This “locating” feature ensures the sealing core is perfectly aligned with the pipe bore every time.