Cutting / seal ring, for hose 6/8 mm, PEEK/PTFE - Riegler 110942

Cutting / seal ring, for hose 6/8 mm, Working pressure max. 10 bar (20°C)/max. 1 bar (170°C), PEEK (cutting ring)/PTFE (seal ring) Perfluoroalkoxy alkane (PFA): A fluoroplastic with the same chemical resistance as PTFE but much stronger and suitable for temperatures up to 200°C.

Standards and origin

• Customs tariff number: 39174000
• Country of origin: DE

About Cutting rings

Cutting and sealing rings are the actual sealing elements inside a compression fitting for plastic tubing. The cutting ring bites into the tube wall while the sealing ring seals against the fitting body. The four sizes suit tubing from 6 to 12 mm outside diameter.

What matters when choosing

• Tube size: outside diameter 6 to 12 mm with inside diameter 4 to 9 mm. Ring and tube have to match exactly, an oversized ring neither cuts nor seals.
• Pressure against temperature: max. 10 bar at 20 °C and max. 1 bar from 170 °C upwards. Always design for the highest operating temperature expected.
• Vacuum: minimum operating pressure is given as -0.9 bar, so the rings also suit vacuum lines.
• Temperature range: -65 °C to 250 °C. This covers applications where elastomer seals no longer survive.
• Materials: the group belongs to the fitting range made from perfluoroalkoxy (PFA), the cutting ring is PEEK and the sealing ring PTFE. All three plastics offer wide chemical resistance.

Typical applications

• Analytical and laboratory lines carrying chemically aggressive media
• Dosing sections in chemical and semiconductor production
• Hot media lines where elastomer seals fail
• Vacuum lines on test and process installations
• Replacement whenever a compression fitting is undone and reassembled

Perfluoroalkoxy (PFA) offers the same chemical resistance as PTFE but reaches noticeably higher strength values and is suitable for temperatures up to max. 200 °C. The four ring sizes are manufactured in Germany.