AZURA® Detector RID 2.1L / RID 2.1L HighFlow Instructions V6750
Product information 43
Perfluorethylenpropylen-Copolymer (FEP), Perfluoralkoxy-Polymer (PFA)
These fluorinated polymers hold similar features as PTFE, but with a lower
operation temperaturte (up to 205 °C). PTA is suitable for ultrapure appil-
cations, FEP can be used universally. They are resistant against almost all
organic and inorganic chemicals, except elemental fluorine under pres-
sure or at high temperatures and fluorine-halogen compounds.
Polyoxymethylene (POM, POM-H-TF)
POM is a semi-crystalline, high-molecular thermoplastic material which
stands out due to its high stiffness, low friction value and thermic stability.
It can even substitute metal in many cases. POM-H-TF is a combination
of PTFE fibres and acetal resin and is softer and has better slip properties
as POM. The material is resistant against diluted acids (pH > 4) as well as
diluted lyes, aliphatic, aromatic and halogenated hydrocarbons, oils and
alcohols. It is not compatible with concentrated acids, hydrofluoric acid
and oxidizing agent. Maximum operating Temperature is 100 ºC.
Polyphenylene sulfide (PPS)
PPS is a soft polymer which is known for its high break resistance and very
high chemical compatibility. It can be used with most organic, pH neutral
to pH high, and aqueous solvents at room temperaturewithout concerns.
However, it is not recommended for using with chlorinated, oxidizing and
reducing solvents, inorganic acids or at higher temperatures. Maximum
operating temperature: 50 °C
Polytetrafluorethylene (PTFE, Teflon®)
PTFE is very soft and anti-adhesive. This material is resistant against
almost all acids, lyes and solvents, except against fluid natrium and fluo-
ride compounds. In addition, it is temperature-resistant from -200 °C to
+260 °C.
Systec AF™
This amorphous perfluorinated copolymer is inert against all commonly
used solvents. However, it is soluble in perfluorinated solvents like Fluo-
rinert® FC-75 and FC-40, and Fomblin perfluor-polyether solvents from
Ausimont. In addition, it is affected by Freon® solvents.
Polychlortrifluorethylene (PCTFE, Kel-F®)
The semi-crystalline thermoplastic material is plasticizer-free and dimen-
sionally stable, even in a wide temperature range
(−240
°C to+205 °C).
It
is moderately resistent against ether, halogenated solvents and toluene.
Halogenated solvents over +60 °C and chlorine gas should not be used.
Fluorinated rubber (FKM)
The elastomer consisting of fluorinated hydrocarbon stands out due to
a high resistance against mineral oils, synthetic hydraulic fluids, fuels,
aromatics, and many organic solvents and chemicals. However, it is not
compatible with strong alkaline solvents (pH value >13) like ammonia,
and acidic solvents (pH value <1), pyrrole and THF. Operating tempera-
ture: Between -40 °C and +200 °C.
Perfluorinated rubber (FFKM)
This perfluoro elastomer has a higher fluorine content as fluorinated
rubber and is therefore chemically more resistant. It can be employed at
higher temperatures (up to 275 °C). It is not compatible with Pyrrole.
