Pressfitting systems in cupronickel, marinePRES / Cupro Nickel
https://www.racmet.com/en-ww/marine-pres.aspx
Inside each fitting, a green FKM O-Ring, with a patented profile, is directly fitted at the end of production. ... A wide range of seamless Tees, patented by Raccorderie Metalliche A wide range of reliable fittings with the Raccorderie Metalliche patented O-Ring in FKM. ... Green FKM O-Rings can be used between [...]

Raccorderie Metalliche and thermal solar plants
https://www.racmet.com/en-ww/thermal-solar-plants.aspx
All steelPRES fittings are pre-fitted EPDM O-Ring, soon replaced by a  green FKM O-Ring developed to be used at high temperatures -20/+220° C and compatible with Glycol inside the plant. ... All inoxPRES fittings are pre-fitted EPDM O-Ring, soon replaced by a  green FKM O-Ring developed to be used at high temperatures -20/+220° C and [...]

FKM
https://www.racmet.com/en-ww/fkm.aspx
Communication > Glossary > FKM FKM O-Ring; Oring; OR; fluorocarbon rubber; patented lens-shaped sealing ring placed at the bulging edges of pressfitting fittings with inoxPRES HT’s system for silicone free plants.

HT
https://www.racmet.com/en-ww/ht.aspx
Communication > Glossary > HT HT Pressfitting systems for silicone free plants; HT; FKM. InoxPRES “Silicone free” range of products; made of stainless steel, with FKM O-Ring used in the industrial sector, where degreasing conditions of all components, pipes and fittings are mandatory for a correct management of the whole plant.

Silicone free
https://www.racmet.com/en-ww/silicone-free.aspx
Communication > Glossary > Silicone free Silicone free Pressfitting systems for silicone free plants; HT; FKM. InoxPRES “Silicone free” range of products; made of stainless steel, with FKM O-Ring used in the industrial sector, where degreasing conditions of all components, pipes and fittings are mandatory for a correct management of the whole plant.

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

Raccorderie Metalliche - silicone free systems, Events and News, Raccorderie Metalliche
https://www.racmet.com/en-ww/sli.aspx
Events and News > Raccorderie Metalliche - silicone free systems Raccorderie Metalliche - silicone free systems 06/02/2017 Raccorderie Metalliche has developed a stainless steel Pressfitting system for silicone free systems, with fkm O-Ring. ...   The new inoxPRES FKM Silicone Free range is suitable for any industrial applications requiring degreasing [...]

O-ring
https://www.racmet.com/en-ww/o-ring.aspx
Different O-Rings are available according to the type of application (EPDM, STEAM, HT, FKM, NBR-HNBR,MVQ)

Raccorderie Metalliche and Silicone free systems, Events and News, Raccorderie Metalliche
https://www.racmet.com/en-ww/raccorderie-metalliche-and-silicone-free-systems-v1.aspx
Events and News > Raccorderie Metalliche and Silicone free systems Raccorderie Metalliche and Silicone free systems 06/05/2018 A new Silicone Free stainless steel pressfitting range with FKM O-Ring, suitable for applications that do not require the use of silicone.   Raccorderie Metalliche has set up a whole range of Inoxpres system ‘’Silicone [...]

Which O-Rings are currently available?, The expert answers
https://www.racmet.com/en-ww/which-o-rings-are-currently-available.aspx
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) O-Rings; MVQ (silicone rubber) O-Rings; For uses different from traditional uses (water, EPDM, gas NBR, solar FKM), always enquire about compatibility by contacting our [...]