gaskets

Spirometallic gaskets

CMD spirometallic gaskets are made of a shaped metal strip and a filler material wound together with constant tension. This combination ensures optimal elasticity, which is essential to guarantee sealing even under fluctuating temperature and pressure conditions. The filler can include materials such as graphite, PTFE, ceramic or glass fiber, chosen according to specific operational needs.

The metal strips used in spirometallic gaskets are available in a wide range of materials, including steels such as 304, 316L, Hastelloy, Monel, Incoloy and SuperDuplex. This variety makes it possible to customize the gaskets to adapt them to different operating environments, guaranteeing resistance to corrosion, wear and thermal stress.

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Centering rings and functional applications of spirometallic gaskets

Spirometallic gaskets can be made with or without an internal ring, external ring, or both.

The inner ring prevents fluid turbulence and prevents the deposition of materials between the flanges. Generally, it is made of the same material as the spiral: this reduces erosion of the surfaces.

The outer ring, on the other hand, is used for centering between the bolts and acts as a spacer, ensuring correct assembly and preventing lateral expansion of the spiral.

Production of spirometallic gaskets and quality control

CMD uses machinery designed and built specifically based on long experience in the sector to guarantee maximum performance during all phases of production. The process includes the dosing, winding and compression of the materials, maintaining constant control over the winding tension and dimensions. The produced gaskets can vary from 15 mm to over 4000 mm in diameter and are available in standard circular shapes or, on request, in special configurations, such as oval, square or custom.

Each gasket undergoes a manual unit check, which verifies compliance with the design specifications, ensuring excellent performance and reliability over time.

Application sectors and technical performance of spirometallic gaskets

Spirometallic gaskets are used in a wide range of industrial sectors. Thanks to their chemical and thermal resistance, they are particularly suitable for the chemical and petrochemical industry.

Spirometallic gaskets are also used in power plants and steam generation systems, with an operating range from -200°C to 1000°C and pressures up to 400 bar.

A typical high usage of spirometallic gaskets concerns refineries and, more generally, the steam industry, contexts in which perfect adherence between metal surfaces is required.