Raccorderie Metalliche and heating plants
https://www.racmet.com/en-ww/heating-plants.aspx
All inoxPRES fittings are pre-fitted EPDM O-Ring,  developed to be used  providing for the highest possible performances:, maximum pressure PN16, temperature ranges -20/+220° C and quality in time. ... SteelPRES fittings are pre-fitted EPDM O-Rings, a compound providing for the best possible performances: PM16 maximum pressure, temperature [...]

Raccorderie Metalliche and cooling plants
https://www.racmet.com/en-ww/cooling-plants.aspx
All inoxPRES fittings are pre-fitted EPDM O-Ring,  developed to be used  providing for the highest possible performances: maximum pressure PN16, temperature ranges -20/+220° C and quality in time. ... It is then wise to use a pipe with a polypropylene layer to protect the metal. steelPRES fittings are pre-fitted EPDM O-Rings, a compound [...]

Silicone free systems
https://www.racmet.com/en-ww/silicon-free-systems.aspx
Raccorderie Metalliche has set up a whole range of Inoxpres system ‘’Silicone Free’’ with the FKM o-ring, tested and following the highest standards of cleanness which allows to respect the ASTM international standards.

Raccorderie Metalliche and brackish water plants
https://www.racmet.com/en-ww/brackish-water-plants.aspx
All marinePRES fittings are fitted with a green O-Ring in FKM, compatible with Class 1 and 5 plants (ISO 8573-1/2001) and PN16 approved.

Steam plants
https://www.racmet.com/en-ww/steam-plants.aspx
  The advantages for the pressing inoxPRES system, designed to build steam units: Simple, easy and user-friendly assembly (efficient) Rapid installation with a lower number of labour hours required Safe and approved (guaranteed system) No specialised labour required (no certification) Safety and no use of open flames     The inoxPRES STEAM range with white [...]

Nebulisation plants
https://www.racmet.com/en-ww/nebulisation-plants.aspx
The fittings are supplied with a black sealing ring made of EPDM, suitable and certified for contact with drinking water.

Raccorderie Metalliche and process water plants
https://www.racmet.com/en-ww/water-process-plants.aspx
All marinePRES joints are fitted with a green O-Ring in FKM, compatible with Class 1 and 5 plants (ISO 8573-1/2001) and PN16 approved.

Sealing Ring
https://www.racmet.com/en-ww/sealing-ring.aspx
Communication > Glossary > Sealing Ring Sealing Ring O-Ring; patented lens-shaped seal, which adheres perfectly to the toroidal chamber.

O-ring
https://www.racmet.com/en-ww/o-ring.aspx
Communication > Glossary > O-ring O-ring Oring; OR; patented lens-shaped sealing ring placed at the bulging edges of pressfitting fittings. Different O-Rings are available according to the type of application (EPDM, STEAM, HT, FKM, NBR-HNBR,MVQ)

Which O-Rings are currently available?
https://www.racmet.com/en-ww/which-o-rings-are-currently-available.aspx
Communication > The expert answers > Which O-Rings are currently available? Which O-Rings are currently available? The O-Rings currently available are: EPDM (ethylene-propylene diene polymer) O-Rings usually assembled on pressfitting joints; NBR (nitrile rubber) O-Rings; FKM (fluorocarbon rubber) [...]