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H i g h P e r f o r m a n c e
P e r fl u o r o e l a s t o m e r P a r t s
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Ta i l o r - m a d e t e c h n i c a l s o l u t i o n s
NEXA produce perfluoroelastomer sealing elements for critical applications,
where high temperatures, water steam, wet applications, purity and
chemical resistance are the factors to be faced. Our mission is to find the
right and durable sealing element for the worst working conditions.
The philosophy of the Company has always oriented the activities in order
not to become only supplier of sealing elements (O-Rings, Special parts and
so on) but to be customer consultants and develop the right product for
every different application.
Our strength is the technical and production capability to develop and
realise special compounds always improving their properties with reference
to the working parameters to be supported. Our production is focused to
enhance the sealing performance in aggressive environments in particular
segments of the market like food, pharmaceutical, semiconductor,
aerospace and petrochemical industries.
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P e r f o r m a n c e w i t h H i g h t e m p e r a t u r e
The NEXA products resist up to 334C working temperature (PFX 9014)
maintaining their elasticity.
They are particularly recommended in water steam and wet applications. In fact,
all the tests after steam exposure 168 h @ 300C + dry-out 4 h @ 120C, showed
excellent steam resistance by far higher than triazine cured materials.
The compression sets (test method in hot air) of the NEXA compounds can be
defined the best values available on the market for similar products.
40
30
20
10
0
100 200 300
Temperature (C) - measured on O-Ring #214
Compressionset(%)
PFX8050- Compressions set at 72h
40
30
20
10
0
100 200 300
Temperature (C) - measured on O-Ring #214
Compressionset(%)
Compressions set at 168h
PFX9014- Compressions set at 72h
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C h e m i c a l r e s i s t a n c e
Nexa perfluorolastomer products have a wide
spectrum of chemical resistance, withstanding
aggression from hundreds of solvents, plasmas and
chemicals always with a very small swell.
0
Strong acids
Alkalis
Strong
oxi
dants
Ethers/
Ester
s
Amines
Hot
wat
er/ste
am
Solvents
Ketones
4
8
12
16
20
Radar chart for chemical resistance
Volume change (%)(Value on single axis refers to average data)
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L o n g l i f e o f t h e s e a l i n g p r o d u c t s
The NEXA seals, thanks to their resistance to chemicals and high temperatures
present very low values of embrittlement and swelling, typical reasons of
premature failure of every kind of seal and gasket.
It means that our products have long life reducing maintenance costs, failure risks
and increasing productivity.
In some cases the performance of the seals have been enhanced so much that,
while another sealant elements only worked 45 hours, the NEXA products worked
for more than 4300 hours continuously in Grade one conditions.
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M a t e r i a l s p e c i f i c a t i o n s
PHYSICAL PROPERTIES AND COMPOUNDS COMPARISON
STANDARD SPECIAL
Original Physical Properties Method UnitSpeci-
menPFX8010
PFX8014
PFX8045
PFX8050
PFX8012
PFX8028
PFX8034
PFX9010
PFX9014
PFX9020
ColourBlack
W
hite
Black
Black
W
hite
W
hite
Black
Translucent
Am
ber
Translucent
Max.temperature (range air) C +260 +250 +300 +320 +250 +250 +260 +300 +334 +300
Hardness DIN 53505 Sh A 6 mm 755 755 755 755 805 805 755 655 705 805
Modulus 100% DIN 53504 N/mm2 S2 10 8 6 5 4 5 8 3 4 4
Tensile strength DIN 53504 N/mm2 S2 18 14 13 12 18 10 18 16 15 17
Elongation at break DIN 53504 % S2 140 130 160 150 110 160 160 250 200 220
Compression Set (O-Ring International size 214)
24h 200C (392F) DIN 53517 % 20
70h 200C (392F) DIN 53517 % 25
70h 230C (446F) DIN 53517 % 30
72h 200C (392F) DIN 53517 % 25 18 25 25 25 25 18 35
72h 250C (500F) DIN 53517 % 25
72h 260C (482F) DIN 53517 % 22
72h 290C (554F) DIN 53517 % 27
72h 316C (600,8F) DIN 53517 % 31
168h 200C (392F) DIN 53517 % 22
168h 275C (527F) DIN 53517 % 33
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