Spiralwound gaskets

Alpi Guarnizioni spiral wound gaskets are high-performance sealing solutions designed for industrial applications subject to high temperatures, high pressures and variable loads.
These are flat gaskets consisting of a continuous strip of metal with a “V” profile, uniformly wound in a spiral and coupled with a filling material that ensures elasticity, recovery and optimal adaptation to flanging surfaces.

Thanks to their structure, spiral wound gaskets guarantee reliable sealing even in the presence of fluctuating pressures, maintaining consistent performance over time and significantly reducing the risk of leaks.

Advantages of spiral wound gaskets

Alpi Guarnizioni spiral wound gaskets are considered one of the most reliable sealing solutions for heavy-duty applications. The main advantages include:

• High elasticity under compression, thanks to the V-shaped metal profile
• Effective sealing even with pressure and temperature variations
• Excellent mechanical resistance, ideal for critical industrial applications
• Possibility to control compressibility by varying the number of metal and filling layers
• Easy removal after use, no adhesives required

These characteristics make spiral wound gaskets particularly suitable for flanges subject to thermal cycles and variable loads, as also highlighted in the product’s technical documentation.

Materials used for spiral wound gaskets

Alpi Guarnizioni spiral wound gaskets can be made from a wide range of materials, which can be selected according to operating conditions and the type of fluid.

The combination of metal tape and filling material results in a gasket with excellent adaptability and resistance, even in extreme operating conditions.

The metal tape is available in high-performance materials:

• AISI 304
• AISI 316 / 316L
• AISI 321 – 347
• INCONEL® 600 / 625
• INCOLOY® 825
• MONEL®
• Titanium
• SAF® 2205
• HASTELLOY C®276

The filler material can be:

• Graphite, ideal for high temperatures and critical applications
• PTFE, suitable for chemically aggressive environments

Industrial applications of metal-spiral wound gaskets

Thanks to their versatility, Alpi Guarnizioni metal-spiral wound gaskets are used in numerous industrial sectors, including:

• Chemical and petrochemical industry
• Steam plants and thermal power stations
• Energy and power generation sector
• Heat exchangers and pressure vessels
• Industrial plants subject to thermal cycles and variable pressures

Gaskets can be made in different shapes, such as circular or oval, and also in square or rectangular versions, to suit different flange configurations and plant requirements.

Customised metal-spiral gaskets

To meet the specific needs of each system, Alpi Guarnizioni manufactures customised metal-spiral gaskets, configured according to actual operating conditions.

Customised solutions include:

• Selection of the most suitable metal material
• Selection of the filling material
• Compressibility control through the number of layers
• Customised shapes and sizes

Customised production allows for optimal sealing, improved system safety and extended flange service life.

Contact us for technical advice or to request a customised quote: our team is available to help you identify the most suitable metal-spiral gasket for your industrial application.