InoxPRES 304L
https://www.racmet.com/en-ww/inoxpres-304l.aspx
The fittings feature an 'M profile' toroidal chamber, optimised based on Raccorderie Metalliche's expertise, in which an O-Ring developed by Raccorderie Metalliche is directly mounted at the factory.... A range of reliable fittings featuring an O-Ring developed by Raccorderie Metalliche, the result of a patented [...]

Pressfitting systems in stainless steel, inoxPRES / Stainless steel
https://www.racmet.com/en-ww/inoxpres.aspx
The fittings feature an 'M profile' toroidal chamber, optimised based on Raccorderie Metalliche's expertise, in which an O-Ring developed by Raccorderie Metalliche is directly mounted at the factory. This O-Ring is the result of patented innovation. ... A range of reliable fittings featuring an [...]

press tools and accessories, Tooling UNIKO
https://www.racmet.com/en-ww/tooling-uniko.aspx
  The hydraulic tightness is provided by the presence of the patented lenticular O-ring inside each joint.

Inoxpres UNIKO 304L
https://www.racmet.com/en-ww/inoxpres-uniko-304l.aspx
The fittings feature a toroidal chamber with an 'UNIKO profile', optimised based on Raccorderie Metalliche's experience, which comes factory-fitted with an O-Ring developed by Raccorderie Metalliche, the result of patented innovation. ... A range of reliable fittings featuring an O-Ring developed by Raccorderie [...]

pressfitting systems, Pressfittings
https://www.racmet.com/en-ww/pressfittings.aspx
Pressing permanently deforms the fitting on the pipe thus leading to a perfect mechanical joint, while the O-Ring provides for the hydraulic tightening connection. ... No need to prepare the fittings, with hemp or Teflon as any joint comes with factory mounts O-Rings.

Which O-Rings are required for solar installations?
https://www.racmet.com/en-ww/which-o-rings-are-required-for-solar-installations.aspx
Communication > The expert answers > Which O-Rings are required for solar installations? Which O-Rings are required for solar installations? FKM (fluorocarbon rubber) O-Rings have suitable characteristics for solar panel installations.

What are the dimensional characteristics of the O-Rings assembled on pressfitting joints?
https://www.racmet.com/en-ww/what-are-the-dimensional-characteristics-of-the-o-rings-assembled-on-pressfitting-joints.aspx
Communication > The expert answers > What are the dimensional characteristics of the O-Rings assembled on pressfitting joints? What are the dimensional characteristics of the O-Rings assembled on pressfitting joints? All joints have an O-Ring assembled, with the typical profile, a patented [...]

press tools and accessories, Tooling
https://www.racmet.com/en-ww/tooling.aspx
  The hydraulic tightness is provided by the presence of the patented lenticular O-ring inside each joint.

aesPRES UNIKO
https://www.racmet.com/en-ww/aespres-uniko-v1.aspx
The fittings feature a toroidal chamber with a “UNIKO profile” optimized based on Raccorderie Metalliche’s experience, inside which an O-Ring developed by Raccorderie Metalliche is factory-installed, resulting from a patented innovation. ... A range of reliable fittings featuring an O-Ring developed by [...]

Can EPDM O-Rings be used for compressed-air installations?
https://www.racmet.com/en-ww/can-epdm-o-rings-be-used-for-compressed-air-installations.aspx
Communication > The expert answers > Can EPDM O-Rings be used for compressed-air installations? Can EPDM O-Rings be used for compressed-air installations? ... Up to the oil residual class 4 (ISO 8573 standard), it is still be possible to use the EPDM black O-Ring.