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Lamons Corrugated Metal Gaskets

 The Lamons CMG family of products are considered the standard in respect to corrugated metal gasket technology; an excellent choice for 150 and 300 class ASME flanges where available bolt loading is minimal. The substrate geometry promotes recovery and resilience through thermal cycles and extended service life. CMGs can be direct replacements for spiral wound gaskets and can eliminate inward buckling issues while creating a seal at moderate flange stresses.

Available in a wide range of substrate alloys and covering layer options, CMG style flange gaskets can be utilized to solve many common flange problems. CMG substrate geometries are engineered to achieve maximum recovery characteristics. A specific pitch, core thickness and wall angle is engineered to maximize the seal’s ability to overcome relaxation through joint relaxation, pressure and thermal cycles.

Lamons Corrugated Metal Gaskets

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CMG – Lamons Corrugated Metal Graphite (CMG) is a high performance gasket for standard flange or heat exchanger applications. The CMG molds in place by filling in irregularities of the spaces creating a superior seal. It maintains the seal even in harsh environments including hydrocarbons and steam applications.

The gasket is ideal where low bolt load are present or where high gasket stresses are available. The thin profile is beneficial in areas where flange separation is limited. The heavy 22 gauge core and 1/8” pitch frequency results in superior recovery and crush resistance in the most demanding applications.


CMG-EX – Lamons CMG-EX gasket is a premium variation of Lamons original CMG gasket design. The CMG-EX was designed specifically for heat exchanger applications and provides premium performance in cyclic applications and where a high level of radial shear is present.

The differential movement between flanges on a cyclical application will cause tremendous relaxation on traditional heat exchanger jacketed gaskets. This problem is addressed by the design of the CMG-EX gasket as it maintains a superior seal through operation and upon retightening.


CMGT – The Lamons CMGT style gasket maintains the same distinctive performance of other corrugated metal designs but provides an additional level of chemical resistance by utilizing a PTFE inner ring.

Premium flexible graphite covering layers are used over a corrugated substrate with a PTFE facing covering the inner perimeter of the gasket. This configuration allows the user to maintain a “fire safe” design and have the benefits of additional chemical resistance or graphite contamination in their process.


CMG-PTFE – The Lamons CMG-PTFE gasket is based upon the same design as the CMG but provides the use of expanded PTFE covering layers. This design is commonly used in FRP or plastic piping where low available load are critical.

Premium chemical resistance is realized by the pure PTFE facings and a variety of metallurgical substrates than can be used to match the piping system. The same proprietary substrate geometry is utilized to optimize recovery and resilience.



The CMG-HTG offers rebound and a recovery characteristic where movement between the flanges is a concern, and oxidation of the graphite facing is a potential at elevated temperatures.

Lamons HTG (high temperature gasket) is configured such that the sealing benefit of graphite is included, and is protected with oxidation-resistant barriers of mica material.