Kammprofile Gaskets — ASME B16.20 & EN 1514-6

What is a Kammprofile Gasket?

A kammprofile gasket has a machined metal core with concentric V-shaped grooves on each face, overlaid with thin layers of flexible graphite, PTFE or mica. Under bolt load the facing flows into the grooves and the serration peaks concentrate stress, giving a tight seal at lower bolt load than a spiral wound gasket. The rigid core resists blow-out and the gasket can be refaced and reused. Kammprofile gaskets are widely used on heat exchanger joints, non-standard flanges and services with thermal cycling.

Key features

• Solid metal core with concentric serrations, both faces covered
• Integral or loose locating ring; parallel-root or convex profiles
• Facings: flexible graphite, PTFE, mica / vermiculite
• Cores in SS 316L, 321, 347, carbon steel, nickel alloys
• Standard ASME / EN sizes or cut to heat exchanger drawings

Specification

Applications

• Shell-and-tube heat exchanger girth and channel joints
• Reactor and pressure vessel nozzles
• Flanges with thermal or pressure cycling
• Large and non-standard flanges

Kammprofile vs spiral wound gasket

Both are semi-metallic gaskets for raised face flanges. A kammprofile gasket has a solid serrated metal core, needs lower seating stress, is less sensitive to over-compression and can be refaced and reused. A spiral wound gasket is lighter and more resilient but cannot be reused. Kammprofile is often preferred for heat exchangers and for joints where available bolt load is low.