Thermo OEM Customize EPDM EN681 Heat Resistant O Ring
Thermo O Ring Heat Resist Strength Resistance Epdm Seal O-Rings OEM
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Performance advantages of EPDM rubber sealing ring
EPDM rubber seals are widely used, and have gradually begun to be
applied in China. Compared with other ordinary rubber seals, they
have good anti-aging properties.
According to the relevant test report: EPDM rubber is naturally
aged for 23 years at a cross-sectional compression rate of 30%, and
the compression set is less than 10%; while other ordinary rubbers
are naturally aged at a cross-sectional compression rate of 30%. In
a few years, the compression set has exceeded 10%. In a medium
containing 50ppm of ozone, when the static stretching is 30%, the
EPDM rubber will crack for more than 150 hours; while the butyl
rubber will crack within a few hours. In a medium containing 100
ppm ozone, EPDM rubber did not crack after 2430 hours; while butyl
rubber had large cracks in only 534 hours, and neoprene cracked in
46 hours.
Due to the difference in the molecular structure of EPDM (EPDM),
the performance difference of rubber seals is largely determined:
in the molecular structure of common rubber such as styrene
butadiene rubber (SBR) and natural rubber (NR) that are widely used
at present Containing a large amount of CC unsaturated double
bonds, it is easy to chemically react with the active materials in
the air or in the medium (such as ozone, oxygen, metal ions, mold,
etc.), causing the rubber molecular chain to break, crosslink and
other aging, thereby making the rubber Loss of elasticity leads to
seal failure; while the molecular structure of EPDM is mainly
composed of CH bond, due to its lack of polarity, low degree of
unsaturation, extremely high chemical stability, and excellent
chemical resistance. Therefore, various polar chemicals such as
alcohols, acids (acetic acid, hydrochloric acid, etc.), strong
alkalis (sodium hydroxide), oxidants (hydrogen peroxide,
hypochlorous acid, sodium perbromate), detergents, animal and
vegetable oils, ketones and certain These esters all have greater
resistance, and their properties do not change much after long-term
contact. Their properties (especially anti-aging properties) are
much better than ordinary rubbers such as styrene butadiene rubber
(SBR) and natural rubber (NR).
Through the above analysis and examples, EPDM rubber seals have the
following significant advantages compared with other ordinary
rubber seals:
1. The best aging resistance. This is one of the most significant
features of EPDM rubber. Its aging resistance is not only much
better than ordinary rubber such as styrene butadiene rubber,
natural rubber, and neoprene rubber, but also better than butyl
rubber, which is generally considered to have good aging
resistance.
2. Excellent chemical stability. When EPDM rubber is used for a
long time in contact with various polar chemicals, its performance
changes little. When other ordinary rubber comes into contact with
various polar chemicals, it will obviously accelerate its aging
process.
3. It has excellent resistance to compression set and compression
stress relaxation. EPDM rubber has very small compression set and
slow stress relaxation, and its compressive deformation resistance
is better than other ordinary rubbers.
4. It has high flexibility. In general rubber, its elasticity is
second only to natural rubber and butadiene rubber, and higher than
other common rubbers.
According to relevant information, the service life of EPDM rubber
ring is substantially longer than that of ordinary rubber ring.
Compared with the normal service life of the ordinary rubber ring
used today, which is 30-50 years, it is very different. Under the
same environmental conditions (that is, the buried depth is
0.5-3.0m, the ambient temperature is 18°C-22°C), after calculation
The normal service life of EPDM rubber sealing ring is 110 years.
Pay attention to the construction according to the specification.
EPDM rubber sealing ring can match the operating life of the
ductile pipe from 70 to 100 years, so that the pipeline network is
safe to operate. Get fundamental protection.
Product Info |
|
Name | O-RINGS |
Material Type | NBR,EPDM,SILICONE,FKM,FFKM,AFLAS,SBR,NR,etc. |
Hardness Range | 20-90 Shore A |
Color | Any color is OK |
Size | AS568, PG & Non-Standard O-Rings |
Tolerance Standard | AS568, ISO2768-M or ISO3302-1:2014 CLASS M2 |
Material Characteristic | See below rubber materials properties |
Application | For all industries |
Certificates | FDA, UL, NSF61, KTW, W270, ACS, AS4020, WRAS, EN681, EN549, ROHS,
REACH, USP CLASS VI |
OEM / ODM | Available |
Packing Details | PE plastic bags then to the carton / as per your request |
FKM imported perfluorinated O-ring perfluorinated o-ring seal
features:
1. High temperature;
2. Strong corrosion resistance;
3. Ultra-cleanliness. Imported perfluorinated O-ring seal.
Scope of application:
1. Chemical process and petroleum refining: the Sealing products
are used in mechanical seals, pumps, reactors, agitators,
compressor housings, valves, various instruments and other
equipment. Usually used as packing for valve seats and stems,
diaphragms and gaskets.
2. Analysis and process instruments: partitions, diaphragms,
cylindrical accessories, hoops, gaskets, etc.
3. Semiconductor manufacturing
4. Food and pharmaceutical
5. Aviation and aerospace
