Kammprofile Gasket

Kammprofile Gaskets for Critical Service Applications

Kammprofile gaskets pair a precision‑machined serrated metal core with a soft, compressible facing. This construction delivers reliable sealing under high pressure, elevated temperatures, and frequent cycles where sheet gaskets can fail. They are suited to demanding flanged joints in oil and gas, chemical processing, power generation, and metallurgy.

How they work and where they excel

Concentric serrations focus load through the graphite, PTFE, or ePTFE facing to achieve tightness at lower seating stresses than solid metal. The profile resists extrusion and creep.

Use them on RF, TG, and MF flanges. They handle thermal cycling, vibration, flange distortion, and fluctuating bolt loads with stable, repeatable compression.

Term variations you may encounter

Also referred to as kamm profile gaskets, serrated metallic gaskets, grooved metal gaskets, or semi‑metallic gaskets in drawings and plant documentation.

Core Features and Advantages

✅Tight seal with strong blowout resistance from the serrated metal core

✅High recovery to cope with temperature/pressure cycling and bolt relaxation

✅Conforms to imperfect or damaged flanges while limiting flange face wear

✅Facing options for aggressive media and extreme temperatures

✅Predictable compression and long service life with controlled machining

Materials, Facings, and Flange Compatibility

Materials and facings

Cores are available in stainless steels, carbon steel, and specialty alloys such as Inconel for corrosion and creep resistance. Facings include reinforced graphite for high‑temperature stability, PTFE for broad chemical resistance, and ePTFE for low bolt load and oxygen‑sensitive or food‑grade lines. We help match materials to media, temperature, and pressure.

Flange styles and sealing faces

Configured for RF, TG, and MF flanges with profiles aligned to common ASME, EN, and DIN dimensions. Groove geometry and facing thickness are tuned to reach the target tightness with the available bolt load across Class 150 and higher ratings.

Manufacturing precision and quality assurance

In‑house machining controls groove depth, pitch, and surface finish. Material traceability and dimensional checks support consistent performance from batch to batch.

Variants and Typical Ranges

Graphite‑Faced

Best for high‑temperature steam, hydrocarbons, and thermal cycling. Reinforced graphite conforms to flange irregularities while the serrated core provides blowout resistance.

Typical ranges

Applied across common pressure classes and elevated temperatures per graphite grade and core alloy. Sizes follow ASME/EN dimensions with facing thickness set to bolt load and tightness targets.

PTFE/ePTFE‑Faced

Recommended for aggressive chemicals and applications needing lower seating stress. PTFE offers broad chemical resistance; ePTFE adds higher conformability for lower loads and oxygen‑sensitive service.

Typical ranges

Used within PTFE temperature limits in chemical processes. Sizes per ASME/EN/DIN. Facing thickness and serration geometry are selected to balance tightness and cold‑flow control.

Unfaced Metal (TG/MF)

For TG or MF flanges where metal serrations seal directly on the mating face, providing maximum mechanical robustness in designs intended for metal‑to‑metal compression.

Typical ranges

Applied in high‑pressure systems per design. Core alloy selected for temperature and corrosion resistance. Dimensions matched to TG/MF grooves, with seating stresses calculated for the service.

Heat Exchanger Designs

Ring or segmented gaskets with tailored facings for channel covers and shells. The serrated profile maintains tightness under differential expansion and frequent cycling.

Typical options

Graphite for thermal stability or PTFE/ePTFE for chemical duty. Custom segments, pass partitions, and special profiles produced to drawing.

Applications and Operating Conditions

Proven in upstream/downstream oil and gas, petrochemicals, fine chemicals, power generation (steam lines, boilers, turbines), metallurgy, and general manufacturing. Typical duties include high‑pressure steam, sour service, solvents, acids/alkalis, and oxygen‑sensitive media when paired with suitable facings and core alloys.

Typical media and conditions

They handle pressure/temperature cycling, flange distortion, bolt relaxation, and vibration. When correctly specified and installed, these gaskets help maintain tightness across startups and shutdowns and support emission‑control objectives.

Sizing, Standards, and Customization

Supplied to ASME, EN, and DIN flange dimensions or built to print for non‑standard envelopes. IDs/ODs, groove pitch, and facing thickness can be adjusted to achieve the required tightness at available bolt loads.

Drawing‑based builds

Send CAD/DWG/SolidWorks files for manufacturing, including segments, pass bars, and special profiles. Logo marking and packaging customization are available on request.

Material traceability and testing

Material certificates for cores and facings can be provided. Each batch undergoes dimensional verification and surface finish control to support consistent sealing performance.

Installation Guidance and Operational Notes

✅Clean and align flanges; verify surface finish

✅Select the correct facing and profile for RF/TG/MF

✅Apply controlled, even bolt‑up in a cross pattern

✅Recheck torque after thermal stabilization if required

Torque and handling notes

✅Use compatible fastener lubricants and calibrated tools

✅Avoid scratching or contaminating the facing; store flat and dry

✅For RF flanges, match facing thickness and serration geometry to available bolt stress

Why Choose Ningbo Dongheng for Kammprofile Gaskets

Since 2004, Ningbo Dongheng Sealing Co., Ltd. has produced precision sealing solutions in Cixi, Zhejiang, China. We machine stainless steel, carbon steel, and Inconel cores with graphite, PTFE, and ePTFE facings for reliable performance under demanding temperature, pressure, and chemical conditions.

Rapid response, OEM/ODM, and branded options

We support emergency orders, flexible MOQs, drawing‑based OEM/ODM, and product/packaging branding to fit maintenance workflows. Contact our Kammprofile gasket manufacturer team to request a quote.

Industry‑focused engineering support

We provide material compatibility guidance, joint reviews, and failure‑prevention recommendations to help improve uptime and reduce rework.

FAQ

When should I choose graphite over PTFE/ePTFE facings?

Use graphite for higher temperatures and thermal cycling. Choose PTFE/ePTFE for aggressive chemicals, lower bolt loads, and oxygen‑sensitive lines.

Can these gaskets seal imperfect or worn flanges?

Yes. The soft facing conforms to minor irregularities while the serrated core maintains blowout resistance. Verify flange condition against applicable standards before installation.

Are sizes available for non‑standard equipment?

Yes. We build to print for non‑standard envelopes and can supply segmented designs with pass partitions for heat exchangers.