What are the properties of pure graphite?

Pure graphite seals are made from expanded graphite and offer high resistance to extreme temperatures (from -200 °C to 550 °C) as well as excellent chemical resistance to various media such as saturated steam, gases, fuels, acids, and alkalis. They are particularly pressure-resistant and suitable for demanding applications in the industry where a reliable seal is required.

Properties of Reigrapht seals (Frenzelit e.g. novaphit® VS) 


Product Specification Seal material
Material expanded graphite
Color gray, silver
Technical Properties
Operating Temperature -200 °C to 550 °C / -328 °F to 932 °F (depending on medium and application area)
Working Pressure up to 60 bar / 870 psi (higher possible depending on medium and application area)
Physical and Chemical Properties
Physical Very good aging resistance, very high pressure and temperature resistance
Chemical Very good universal resistance to saturated steam and hot water, gases, salt solutions, fuels, alcohols, organic and inorganic acids, lubricants, coolants, caustics, fats, etc.
Portrait von Dirk Göttgens
Portrait von Dirk Göttgens

Would you like personal advice?

Benefit from our expert knowledge in process monitoring. Our experienced team will provide you with sound advice when selecting the ideal sight glass fittings for your specific requirements. Schedule your personal consultation now!
Dirk Göttgens
Executive management
Go to contact form

Direct Contact

Do you have questions about our products or services? Would you like personal advice on a specific concern? Feel free to contact us directly! Our experts are here for you and look forward to assisting you.

All fields are mandatory.
Our privacy policy applies.

Search... Your entries are invalid! Please contact us! Possible working pressure: Required thickness: Maximum temperature: This is a standard sight glass that we would be happy to manufacture for you. This is a sight glass according to DIN This is a sight glass according to DIN , which we would be happy to manufacture for you.