Graphite gaskets

Alpi Guarnizioni graphite gaskets are high-performance sealing solutions designed for industrial applications characterised by high temperatures, high pressures and the presence of aggressive fluids.
Thanks to the intrinsic properties of graphite, these gaskets guarantee reliability, durability and operational safety even in the most extreme operating conditions.

Graphite gaskets are particularly appreciated for their ability to adapt to sealing surfaces, compensate for any irregularities and maintain a constant seal over time, reducing the risk of leaks and plant downtime.

Advantages of graphite gaskets for industrial use

The use of Alpi Guarnizioni graphite gaskets offers numerous advantages in the most demanding industrial applications:

• Resistance to high temperatures;
• Excellent chemical resistance;
• Excellent adaptability to sealing surfaces
• Self-lubricating properties, which reduce friction and wear
• Fire-safe, ideal for critical applications
• No binders or resins, for stable performance over time

These characteristics make graphite a benchmark material for industrial pumps, valves and sealing systems.

Types of graphite gaskets available

Alpi Guarnizioni graphite gaskets are available in different configurations, designed to meet specific application requirements.

Reinforced graphite gaskets

Reinforced graphite gaskets are made from pure expanded graphite tape with a corrosion inhibitor, wound in a spiral together with a perforated metal foil.

The reinforcement can be made of:

• 304 stainless steel
• 316/316L stainless steel
• Zinc
• Nickel
• Inconel

This structure guarantees greater resistance to high pressures and superior mechanical stability, making the gasket suitable for particularly severe operating conditions.

Expanded graphite gaskets

Type A01 expanded graphite (Fire-Safe) rings are made from pure expanded graphite tape with a corrosion inhibitor, wound into a spiral and pressed to achieve the density required for the application (from 1.2 to 2 g/cm³).

These gaskets:

• are pre-compacted to facilitate installation
• have precision dimensions
• offer excellent sliding and self-lubricating properties
• are free of binders or resins

Expanded graphite rings operate in a temperature range between -200 °C and +550 °C and are suitable for steam and high-temperature applications, also ensuring fire safety requirements (Fire-Safe).

Main applications of graphite gaskets

Thanks to their versatility and reliability, Alpi Guarnizioni graphite gaskets are used in numerous industrial sectors, including:

• Industrial pumps and valves
• Steam plants and thermal power stations
• Chemical and petrochemical industry
• Oil & gas
• Applications with gases, oils and aggressive fluids

Graphite gaskets cover the entire range of applications for pumps and valves, even under extreme pressure and temperature conditions.

Graphite gaskets and reference standards

Alpi Guarnizioni graphite gaskets are designed to meet the main regulatory and technical requirements for industrial plants.

Among the most relevant regulatory and quality aspects are:

• Compliance with Fire-Safe requirements
• Controlled chloride and sulphur content
• High carbon content (≥ 98%)
• Production in accordance with established industrial standards

These parameters guarantee safety, reliability and compatibility with the most critical industrial applications.

Customisation and tailor-made production of graphite gaskets

Each plant has specific operating conditions. This is why Alpi Guarnizioni manufactures customised graphite gaskets, designed according to the customer’s actual needs.

Customised solutions include:

• Choice of graphite density
• Moulded or reinforced rings depending on the application
• Selection of reinforcement materials
• Dedicated dimensions and geometries

Customised production ensures optimal sealing, improving the efficiency and operational life of the system.

Rely on an expert partner for your graphite gaskets

Choosing Alpi Guarnizioni graphite gaskets means relying on a partner with technical expertise, attention to quality and the ability to provide reliable solutions even in the most extreme conditions.

Thanks to the use of high-quality expanded graphite, corrosion inhibitors and the possibility of creating customised solutions, Alpi Guarnizioni supports customers in choosing the most suitable gasket for every industrial application.

Contact us for technical advice or to request a customised quote: our team is available to help you find the ideal sealing solution.