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8/9/2019 COG Broschuere Industrie ENG
1/28Pr
emium
quality
since
1867
When it matters ...
Elastomer sealsfor highest demands
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2
For the benefit of our customersEuropes largest O-Ring warehouse
Uncompromising premium quality: C. Otto
Gehrckens COG for short has offered its
customers rst-rate quality for 140 years.
Tradition and innovation are a single potent
entity at COG an the key to success. This is
demonstrated daily in our customer relations.
Our customers are among the best in their
respective industries. And they expect no less
from us.
COG has over 180 employees, all committed
to the success of our customers from the
engineers in the Application Technology de-
partment to the quick off the mark colleagues
at Europes largest O-Ring warehouse.
As an independent manufacturer based in
Pinneberg near Hamburg in Germany COG
has been family owned and managed for ve
generations. Today our high delivery capacity,
our agile manufacturing capability as well as our
committed customer service at all levels makes
us a leading supplier of precision O-Rings and
elastomer seals.
Our customers dene our goals in all our
undertakings. From the close cooperation of
Application Technology and Sales new ideas
and products rapidly evolve both goal and
market orientated and with that creating a
considerable market advantage for our
customers. Let us discuss your aims!
For furtherinformation please
have a look at
www.COG.deor contact us
directly.
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Highest demands on modern sealings
Due to the continuous improvement of the manufacturing
processes regarding effectiveness and efciency the demands
on elastomer sealings is also constantly in the increase. The
demands however differ greatly depending on the utilisation,
the application area as well as the industry. Even within a pre-
cisely determined industrial sector it is not uncommon to have
various denitions of requirements for the sealings. There is
a growing trend for individualisation of the sealing solutions.
Only high-quality and precisely processed materials can meet
the many individual requirements. Due to the decades of
experience, our exquisite knowledge of the industry and last
but not least our extraordinary customer relations we at COG
master that challenge. And on more than one occasion havewe been able to pleasantly surprise our customers with new
sealing solutions.
Standards for precision-O-Rings:DIN 3771 and ISO 3601
The basic prerequisite for our premium products is a
continuously high quality in both the choice of materials
as well as the manufacturing of the nal products. COG
exclusively produces and sells precision-O-Rings abiding by
the standards DIN 3771 and ISO 3601. The DIN 3771 denes
the geometric requirements, measurements and tolerances
for precision-O-Rings. DIN 3771 is a German Metric standard.
There has repeatedly been some confusion e.g. in regard to
tolerances, when dealing with countries where the inch is
the common measuring unit. In order to bring the imperialand metrical system in accord the new standard ISO 3601
was introduced essentially based on existing standards for
precision-O-Rings. For anybody involved in these matters the
standard ISO 3601 offers a certain security in dealing with
designers and buyers using the imperial system (i.e. measuring
in inches). The existing measurements from the standard DIN
3771 are still valid and therefore in current use.
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Standards overview
for industrial applications
In many applications different standards apply for the
materials used. This can also apply to elastomer sealings.
In such cases certicates for the employed materials in
those elds are indispensable. It is always best to seek
professional advice in these matters. Why not contact our
engineers in the Application Technology department and
benet from our know how we are glad to help.
Read up on standards for the pharmaceutical industry, food, bio and medical technology in the respective COG-brochure.
Release/Test certificate/Regulation
Application/Country Criteria/StandardsAppropriate
COG material
Recommendation made byGermanys Bundesanstalt
fr Materialforschung undprfung (BAM)
(Federal Institute for Material Research
and Testing)
Seals for oxygen armatures and
different parts of oxygen plant
Regulation B 7 oxygen of the
professional association for
chemical industry
Vi 576
(applies for plants for
gaseous oxygen)
DVGW release for gas(German Association for Gas and Water)
Sealing material made of elastomers
for gas appliance and gas plantsDIN EN 549 P 549, P 550, Vi 569
DVGW release for gas(German Association for Gas and Water)
Sealing material made of elastomers
for gas supply lines and gas
pipelines
DIN EN 682 P 550, P 682, Vi 569
Its always best to consult a professional.
So why not contact our Application Technology department
and take advantage of our expert knowledge!
+49 (0)4101 50 02-26e-mail: [email protected]
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In engineering, where the critical parts, such
as sealings e.g., are concerned, the engineer
or user is confronted rst and foremost with
the question of the right choice in material. For
security reasons developers ought to use very
high quality material for the initial equipment,
e.g. FFKM. This is highly resistant against most
media even in high temperatures further-
more the physical properties are convincing
and hence provide ideal sealing results. How-
ever the cost of those materials exceeds most
budgets by far and therefore the nal product
might not be put on the market at a market-
able price especially in times like today an
argument of increasing importance. Thereforea thorough examination is essentially important
when choosing the material in order to deter-
mine the ideal sealing solution.
In general the materials have to be examined
according to three requirement profiles:
1. Operation temperatures:
Which range of temperature will the sealing be exposed to?
How low is the lowest, how high the highest temperature? Is
the exposure to these temperature ranges merely momentary
or constant?
2. Chemical resistance:
Which media must the sealing be resistant against yet seal
perfectly? Is any interaction to be expected, i.e. application in
acids or bases? Of which temperatures are the media to besealed? Is oil or fat used during assembly?
3. Mechanical properties:
How is the sealing used? Is it supposed to be a latent, static
seal or a non-latent, dynamic seal? In the case of dynamic
sealings: How high is the mechanical stress to be expected?
Is the sealing in motion on the rare occasion, or on a regular or
even constant basis?
The right choice in sealing material
In addition to choosing the ideal material, ques-
tions regarding the correct type of seal (e.g.
design, geometry, sealing size or the groove
design) may be deciding factors for choosing
the ideal sealing. In case you do not have exact
specications for your project or should other
questions occur, our Application Technology
team will be happy to advise you thoroughly
and competently!
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Product overview (part 1 to 3)
ASTMD 1418
ISO1629
COGmaterial
Hardness Colour Operating
temperaturesSpecial properties Page
ACM AC 200 70 Shore A black from -20 C to +200 C 23
AUPU 50 75 Shore A black from -30 C to +125 C high abrasion resistance 14
PU 460 90 Shore A black from -30 C to +125 C high abrasion resistance 14
CR
Ne 280 80 Shore A black from -30 C to +120 C 24
Ne 447, FR 70 Shore A black from -35 C to +120 C unplasticised 24
Ne 451 50 Shore A black from -30 C to +120 C 24
Ne 460 70 Shore A black from -5 C to +120 C use to -5 C 24
Ne 470 70 Shore A black from -40 C to +120 C 24
Ne 501 90 Shore A black from -30 C to +120 C 24
Ne 560 60 Shore A black from -30 C to +120 C 24
Ne 561 50 Shore A black from -30 C to +120 C 24
Ne 570 70 Shore A black from -30 C to +120 C 24
EPDM
AP 300 70 Shore A black from -50 C to +140 C peroxidically cross-linked 12, 19
AP 301 70 Shore A violet from -50 C to +140 C peroxidically cross-linked 19
AP 350 80 Shore A black from -50 C to +140 C peroxidically cross-linked 19
AP 370 70 Shore A black from -50 C to +140 C peroxidically cross-linked 19
AP 380 80 Shore A black from -50 C to +140 C peroxidically cross-linked 19
AP 381 80 Shore A violet from -50 C to +140 C peroxidically cross-linked 19
AP 500 80 Shore A black from -50 C to +130 C 19AP 540 70 Shore A black from -40 C to +130 C 19
AP 545 45 Shore A black from -45 C to +130 C 19
AP 550 50 Shore A black from -40 C to +130 C 19
AP 560 60 Shore A black from -40 C to +130 C 19
AP 580 80 Shore A black from -35 C to +130 C 19
EPM EP 380 80 Shore A black from -35 C to +180 Cperoxidically cross-linked; suited for endless
vulcanisation19
EU EU 90 90 Shore A black from -30 C to +100 C good hydrolysis resistance 14
FEP/FKM FEP 90-95 Shore A black from -20 C to +204 Chigh resistance to chemicals,
high heat resistance; not EU origin25
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ASTMD 1418
ISO1629
COGmaterial
Hardness Colour Operating
temperaturesSpecial properties Page
FEP/VMQ FEP 85-90 Shore A red from -60 C to +204 Chigh resistance to chemicals, high heat resist-
ance, good coldness properties; not EU origin25
PFA/FKM PFA 90-95 Shore A black from -20 C to +260 Chigh chemical resistance, high heat resistance;
not EU origin25
PFA/VMQ PFA 85-90 Shore A red from -60 C to +260 Chigh resistance to chemicals, high heat resist-
ance, good coldness properties; not EU origin25
FEPMAF 100 75 Shore A black from -10 C to +230 C
high resistance to chemicals and to H2S-
containing media, high resistance to hot water
and vapour to 200 C
13, 21
Vi 981 75 Shore A black from -10 C to +200 C high resistance to chemicals 11, 21
FKM
BF 750 75 Shore A black from - 15 C to +200 C high resistance to biogenic media 11, 21
HF 875 75 Shore A grey brown from -15 C to +200 C high resistance to chemicals 11, 21
LT 170 70 Shore A red from -40 C to +200 C very good low-temperature exibility 12, 21
Vi 100 70 Shore A red from -30 C to +200 C good low-temperature exibility 12, 21
Vi 100, S 70 Shore A black from -30 C to +200 C good low-temperature exibility 12, 21
Vi 110, S 80 Shore A black from -30 C to +200 C good low-temperature exibility 12, 21
Vi 370 70 Shore A black from -15 C to +200 C suited for using vacuum 21, 27
Vi 399 90 Shore A black from -15 C to +200 C 21
Vi 400 65 Shore A black from - 15 C to +200 C 21, 27
Vi 455 55 Shore A black from -15 C to +200 C 21
Vi 465 67 Shore A brown from -15 C to +200 C suited for endless vulcanisation 15, 21, 27
Vi 500 80 Shore A black from - 15 C to +200 Csuited for endless vulcanisation and for using
vacuum21, 27
Vi 563 70 Shore A black from - 15 C to +200 C 21
Vi 564 70 Shore A black from -15 C to +230 C use to 230 C 13, 21, 27
Vi 569 80 Shore A black from -15 C to +200 CDVGW approval according to DIN EN 682 type
GB and DIN EN 54915
Vi 576 80 Shore A black from -15 C to +200 Cfor oxygen armatures, uses to 150 C/25 bar
BAM release15
Vi 580 80 Shore A black from -15 C to +200 C suited for using vacuum 21, 27
Vi 590 90 Shore A black from -15 C to +200 C 21
Vi 600 70 Shore A green from -15 C to +200 C increased chemical resistance 21
Vi 650 75 Shore A green from -15 C to +200 C suited for endless vulcanisation 21
Vi 670 80 Shore A green from -15 C to +200 C 21
Vi 675 75 Shore A red from -15 C to +200 C 21
Vi 700 90 Shore A green from -15 C to +200 C 21
Vi 800 75 Shore A black from -5 C to +200 C high resistance to chemicals 21
Vi 890 90 Shore A black from -15 C to +200 C high resistance to explosive decompression 21, 26
Vi 965 65 Shore A black from -15 C to +200 C 21
Vi 970, G 70 Shore A green from -15 C to +200 C 21
Vi 975 75 Shore A black from -15 C to +200 C 21
FVMQ Si 970, FL 70 Shore A blue from - 60 C to +200 Cvery good low-temperature exibility and
resistance to chemicals12, 21
FVMQ Si 971, FL 70 Shore A blue from -60 C to +200 Cvery good low-temperature exibility and
resistance to chemicals12, 21
HNBRHNBR 600 70 Shore A black from -20 C to +150 C 23
HNBR 610 90 Shore A black from -20 C to +150 C 23
IIR BT 480 65 Shore A black from -40 C to +140 C 24
Product overview (part 2 to 3)
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ASTMD 1418
ISO1629
COGmaterial
Hardness Colour Operating
temperaturesSpecial properties Page
NBR
P 370 85 Shore A black from - 20 C to +120 C 23
P 427 90 Shore A black from - 20 C to +120 C 23
P 430 45 Shore A black from -20 C to +120 C 23
P 431, A 75 Shore A black from -10 C to +120 C 23
P 465 65 Shore A black from -20 C to +120 C for endless vulcanisation 23
P 520 70 Shore A black from -20 C to +120 Caccording to the recommendation of KTW
(plastics in drinking water) D1 and D223
P 549 70 Shore A black from -20 C to +120 C DVGW approval according to DIN EN 549 15, 23
P 550 70 Shore A black from -20 C to +120 CDVGW approval according DIN EN 682 and DIN
EN 54915, 23
P 574 55 Shore A black from -20 C to +120 C 23
P 583 70 Shore A black from -25 C to +120 C 23
P 584, RF 70 Shore A black from -50 C to +120 C use to -50 C 12, 23
P 682 70 Shore A black from -20 C to +120 C DVGW approval according DIN EN 682 15, 23
P 700 70 Shore A black from - 40 C to +120 C very good low-temperature exibility 12, 23
P 745 45 Shore A black from -20 C to +120 C 23
P 750 50 Shore A black from -20 C to +120 C 23
P 755 55 Shore A black from -20 C to +120 C 23
P 760 60 Shore A black from -25 C to +120 C 23
P 772 70 Shore A black from -25 C to +120 C 23
P 774 70 Shore A black from -25 C to +120 C not EU origin 23
P 775 75 Shore A black from -25 C to +120 C 23
P 777 70 Shore A black from -20 C to +120 C 23
P 778 70 Shore A black from -25 C to +120 C not EU origin 23
P 780 80 Shore A black from -25 C to +120 C 23
P 780, RF 80 Shore A black from -50 C to +120 C very good low-temperature exibility 12, 23
P 790 90 Shore A black from -20 C to +120 C 23
P 792 90 Shore A black from - 20 C to +120 C 23
P 870 70 Shore A grey from -20 C to +120 C peroxidically cross-linked, unplasticised 23
P 880 80 Shore A grey from -20 C to +120 C peroxidically cross-linked, unplasticised 23
P 990 90 Shore A black from -20 C to +120 C 23
NR
K 545 45 Shore A black from -45 C to +100 C 24
K 560 60 Shore A black from -45 C to +100 C 24
K 570 65 Shore A black from -45 C to +100 C 24
K 850 45 Shore A black from -45 C to +100 C 24
PTFE PT 950 95 Shore A white from -200 C to +260 Chigh resistance to chemicals, wide temperature
operating range25
VMQ
Si 810, S 70 Shore A black from -55 C to +200 C very good low-temperature exibility 19
Si 850, R 50 Shore A red from -55 C to +200 C very good low-temperature exibility 19
Si 855, R 55 Shore A red from -55 C to +200 C very good low-temperature exibility 19
Si 860, R 60 Shore A red from -55 C to +200 C very good low-temperature exibility 19
Si 861, R 60 Shore A red from -55 C to +200 C very good low-temperature exibility 19
Si 865, R 65 Shore A transparent f rom -55 C to +200 C very good low-temperature exibility 19
Product overview (part 3 to 3)
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Developers, Engineers and users often encounter difculties when a technical equip-
ment or machine comes into contact with especially aggressive media. Often enough this
damages the more sensitive parts, such as e.g. the elastomer sealings, resulting in shorter maintenance intervals, unplanned
machine shutdowns or in the worst case even leakages, which may lead to production stop. COG has designed various differ-
ent materials for use in aggressive environments and can full the most divers requirements with their large product range.
HF 875 (FKM)This multi-purpose sealing material, a highly
uoric polymer, was designed especially
for high sealing demands when exposed
to aggressive media. Even nitric acid and
sodium hydroxide have only slight effects
on the material. This FKM-compound is
also ideally suited for applications with fuels
(carburettor fuels, diesel fuels). The elds of
application range from chemical industriesto engineering to process engineering in
short - all elds of application, where both
thermic as well as high chemical resistance
are indispensable.
Properties:
Universally applicable all-rounder
Excellent resistance to chemicals
In some areas comparable to FFKM
Very good resistance to vapour
Good solvent resistance
Low compression set
Good mechanical properties
Applicabi lity in wide range of
temperature (from -15 C to +200 C)
Very appealing price especially
compared to FFKM
Highest demandsmaterials exposed to aggressive media
Vi 981 (FEPM)This Viton-Extreme-ETP- sealing ma-
terial is an interesting solution for users
with very high demands. The Vi 981
compound is multi-purposely applica-
ble due to its good physical and excel-
lent mechanical properties. Moreover,
the outstanding chemical resistance
of uoric rubber is improved further by
the compound Vi 981. At the same timeheat resistance and low-temperature
exibility persist.
Properties:
High quality FEPM compound
Very good resistance to
chemicals
Excellent mechanical values
Excellent ageing resistance
Good heat resistance and
low-temperature exibility
Extremely multi-purposely
applicable, e.g. in the chemical
and lacquer industry
BF 750 (FKM)This FKM compound was developed
for engineers and users, who at times
encounter great difculties with elastomer
sealings exposed to biogenic media on a
long-term basis. Biogenic media are e.g.
ethanol, ethanol-carburettor fuel mixtures,
rapeseed methyl ester (RME, biodiesel
fuel), RME-diesel fuel mixture and pure
vegetable oils. Furthermore the FKM com-pound is highly applicable in conventional
fuels (carburettor fuels, diesel fuels) and
many other media - a really universally
applicable sealing compound all-rounder
to favourable conditions.
Properties:
Multi-purposely applicable all-rounder
Excellent properties when in use
with biogenic and conventional fuels
Excellent resistance to chemicals
Good solvent resistance
Very good resistance to vapour
Low compression set
High mechanical properties
Applicability in wide range of
temperatures (from -15 C to +200 C)
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
FKMBF 750 75 Shore A black from - 15 C to +200 C high resistance to biogenic media
HF 875 75 Shore A grey brown f rom -15 C to +200 C high resis tance to chemica ls
FEPM Vi 981 75 Shore A black from -10 C to +200 C high resistance to chemicals
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Application in extreme
temperatures
Sealing materials used in cold environ-
ments need to meet special require-
ments. Even in these conditions the seal-
ings used must possess the necessary
exibility in order to seal properly. In the
eld, users are confronted with various
different denitions, therefore compar-
ing materials by different manufacturers
proves difcult. There are many differ-
ent methods of measuring the material
properties at low-temperatures. The
All data regarding the resistance in high and low temperatures apply to continuous application. Temperatures may peak a
great deal higher.
methods usually disclose different
results of measurement. Therefore it
is important to choose the method
that gives accurate information on
the functional efcacy of sealings.
For this reason the COG mate-
rial data regarding the application in
low-temperatures refers to the TR10
value (temperature retraction value),
unless specically stated otherwise.
This value describes the behaviour
ASTMD 1418
ISO1629
COGnumber
Hardness ColourOperating
temperaturesProperties
EPDM AP 300 70 Shore A black from -50 C to +140 C high resistance to hot water and vapour, high ageing resistance
FKM
LT 170 70 Shore A red from -40 C to +200 Cvery good resistance to chemicals, excellent ageing resistance,
excellent low-temperature exibility (TR-10 value: -39,5 C)
Vi 100 70 Shore A red from -30 C to +200 C good resistance to chemicals
Vi 100,S 70 Shore A black from -30 C to +200 C good resistance to chemicals
Vi 110, S 80 Shore A black f rom -30 C to +200 C good resistance to chemica ls
FVMQSi 970 FL 70 Shore A blue from -60 C to +200 C
in comparison to any conventional silicone- rubber very good
resistance to chemicals
Si 971, FL 70 Shore A blue from -60 C to +200 Cin comparison to any conventional silicone- rubber very good
resistance to chemicals
NBR
P 584, RF 70 Shore A black from -50 C to +120 C good res istance to o il and fat, good mechanical propert ies
P 700 70 Shore A black from -40 C to +120 C good res istance to o il and fat, good mechanical propert ies
P 780, RF 80 Shore A black from -40 C to +120 C good res istance to o il and fat, good mechanical properties
ASTMD 1418
ISO1629
COGnumber
Hardness ColourOperating
temperaturesProperties
FEPM AF 100 75 Shore A black from -10 C to +230 Cvery good resistance to hot water, vapour and chemicals and to
H2S gases and oils
FKM Vi 564 70 Shore A black from -15 C to +230 Cvery good resistance to chemicals and ageing,
good mechanical properties
Materials for low temperature applications
Materials for high temperature applications
of a material in low temperatures. The
TR10 value is the temperature at which
an elastomer can recover 10% of its
elastomer potential. In certain applica-
tions some materials can even be used
well below this value. Yet in order to
receive comparability and accuracy of
information the COG data is always in
reference to the TR10 value a reliable
and trustworthy indication for the user.
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Materials for increased
mechanical strain
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
AUPU 50 75 Shore A black from -30 C to +125 C
PU 460 90 Shore A black from -30 C to +125 C
EU EU 90 90 Shore A black from -30 C to +100 C Hydrolysis resistance
In certain applications the used elastomer sealings must
withstand mechanical strain. Not all elastomer materials are
equally suited for these elds of application. The materials
featured on this page all have good mechanical resistance.
Yet this does not mean they are generally applicable for a ll
dynamic sealing applications. First of all it has to be deter-
AU materialsProperties/advantages:
Basic elastomer: polyester urethane rubber
Good mechanical properties
Very good resilienceHigh gas density
Good resistance to fuels and many technically common
oils, especially to oils with higher aromatic content
Good low-temperature exibility
Excellent oxygen and ozone resistance
EU materialsProperties/advantages:
Basic elastomer: polyether urethane rubber
Good mechanical properties
Very good resilienceHigh gas density
Good resistance to fuels and many technically common
oils, especially to oils with higher aromatic content
Good low-temperature exibility
Excellent oxygen and ozone resistance
Good hydrolysis resistance
mined how intense the mechanical strain is in the respective
application. Is the sealing in motion on the rare occasion or
on a regular or even constant basis? This criteria is only one
of many. To be on the safe side: why not consult our Applica-
tion Technology team? Our engineers will be glad to assist
you in choosing the right material for your purposes.
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Sealing materials for gas and/or oxygen
applications must meet special requirements.
In Germany as well as other countries release
certicates or certicate of approval is required
in order to be able to use the materials in certain
NBR materials
Properties/advantages:Basic elastomer:
Acrylnitrile-butadiene rubber
Sulphur cross-linked
Good mechanical properties
Good resistance to oil and fat
Materials for
gas/oxygen applications
FKM materials
Properties/advantages:Basic elastomer:
Fluoroelastomer rubber
Bisphenol cross-linked
Very good media resistance
Any kind of hydrocarbons
(oils, fats, solvents)
Low gas permeability
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
FKM
Vi 569 80 Shore A black from -15 C to +200 CDVGW approval according to DIN EN 682 type GB;
DVGW approval DIN EN 549
Vi 576 80 Shore A black from -15 C to +200 Cfor oxygen armatures, maximum use to 150 C/25 bar,
BAM release
NBR
P 549 70 Shore A black from -20 C to +120 C DVGW approval according to DIN EN 549
P 550 70 Shore A black from -20 C to +120 C DVGW approval according DIN EN 682 and DIN EN 549
P 682 70 Shore A black from -20 C to +120 C DVGW approval according to DIN EN 682
applications. The materials featured here
have at least one certicate of approval and
were designed especially for the use in those
applications.
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EPDM materialsApplication areas:
Multi-purposely applicable, a. o. in
the food industry or wherever high
resistance to hot water and vapour is
required.
Properties/advantages:
Basic elastomer: Ethylene
propylene diene rubber
Peroxidically or sulphur
cross-linked
Good resistance in watery media
Good resistance in many
CIP-mediaGood resistance to hot water
and vapour
Very good ageing and ozone
resistance
Good low-temperature exibility
Partially unresistant to vegetable
and animal oils/ fats
Multiply tried and tested.
EPM materialsApplication areas:
Multi-purposely applicable material,
also very good capabilities for the
food industry.
Properties/advantages:
Basic elastomer: Ethylene
propylene rubber
Peroxidically cross-linked
Good resistance in watery media
Good resistance to acids and
bases
Good resistance in many
CIP-mediaGood resistance to hot water
and vapour
Partially unresistant to vegetable
and animal oils/ fats
Very good ageing, UV and ozone
resistance
Good low-temperature
exibility
Silicone materialsApplication areas:
Application in production methods
with wide range of temperature, e.g. in
the food industry.
Properties/advantages:
Basic elastomer: Silicone rubber
Mostly peroxidically cross-linked
Physiologically inert
Limited mechanical properties
Weakness in certain acid media
Weakness in the SIP-process
Very good low-temperature
exibility
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ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
EPDM
AP 300 70 Shore A black from -50 C to +140 C peroxidical ly cross-linked
AP 301 70 Shore A violet from -50 C to +140 C peroxidical ly cross-linked
AP 350 80 Shore A black from -50 C to +140 C peroxidical ly cross-linked
AP 370 70 Shore A black from -50 C to +140 C peroxidical ly cross-linked
AP 380 80 Shore A black from -50 C to +140 C peroxidical ly cross-linked
AP 381 80 Shore A violet from -50 C to +140 C peroxidical ly cross-linked
AP 500 80 Shore A black from -50 C to +130 C
AP 540 70 Shore A black from -40 C to +130 C
AP 545 45 Shore A black from -45 C to +130 C
AP 550 50 Shore A black from -40 C to +130 C
AP 560 60 Shore A black from -40 C to +130 C
AP 580 80 Shore A black from -35 C to +130 C
EPM EP 380 80 Shore A black from -35 C to +180 C peroxidically cross-linked, suited for endless vulcanisation
Silicone
(VMQ)
Si 810, S 70 Shore A black from -55 C to +200 C very good low-temperature exibility
Si 850, R 50 Shore A red from -55 C to +200 C very good low-temperature exibility
Si 855, R 55 Shore A red from -55 C to +200 C very good low-temperature exibility
Si 860, R 60 Shore A red from -55 C to +200 C very good low-temperature exibility
Si 861, R 60 Shore A red from -55 C to +200 C very good low-temperature exibility
Si 865, TR 65 Shore A transparent from -55 C to +200 C very good low-temperature exibility
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FVMQ/FluorSilicone
materials
Application areas:
Use in production methods with a
wide range of temperatures.
Properties/advantages:
Basic elastomer: uorosilicone
rubber
Mostly peroxidically cross-linked
Compared to silicone rubber an
improved resistance against oils,
fuels and solvents, especially
when used in aromatic and
chlorinated carbohydrates and
alcohols, petrol and alcohol
mixtures
Resistance to aromatic und
naphthenic oils and a number of
chlorinated solvents
Fluoro materialsfor highest demands
FEPM materialsApplication areas:
Use in various industrial applications
with especially high demands.
Properties/advantages:
Basic elastomer: Viton Extreme-ETP or Aas
Peroxidically cross-linked
Applicable in temperatures: -10 C
to +230C, depending on the typeVery good resistance to acids,
bases, ammonia, H2S gases or
Amine-containing additives and
corrosion inhibitors, alloyed motor
and gear oils, brake uids, etc.
Very high resistance to hot water
and vapour
High resistance to chemicals
FKM materialsApplication areas:
Use in various applications in
industries with high demands.
Properties/advantages:
Basic elastomer:Fluoroelastomer rubber
Bisphenol or peroxidically
cross-linked
Very good media resistance
Carbohydrates of all kinds
(oils, fats, solvents)
Low gas permeability
Moderate resistance to
vapour > +130 C
High resistance to chemicals
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17
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
FEPMAF 100 75 Shore A black from -10 C to +230 C
high resistance to chemicals, H2S containing media,
resistance to hot water and vapour up to +200 C
Vi 981 75 Shore A black from -10 C to +200 C high resistance to chemicals
FKM
BF 750 75 Shore A black from - 15 C to +200 C high resistance to biogenic media
HF 875 75 Shore A grey brown f rom -15 C to +200 C high resistance to chemica ls
LT 170 70 Shore A red from -40 C to +200 C very good low-temperature exibility
Vi 100 70 Shore A red from -30 C to +200 C good low-temperature exibility
Vi 100, S 70 Shore A black from -30 C to +200 C good low-temperature exibility
Vi 110, S 80 Shore A black from -30 C to +200 C good low-temperature exibility
Vi 370 70 Shore A black from -15 C to +200 C
Vi 399 90 Shore A black from -15 C to +200 C
Vi 400 65 Shore A black from - 15 C to +200 C
Vi 455 55 Shore A black from -15 C to +200 C
Vi 465 67 Shore A brown from -15 C to +200 C suited for endless vulcanisation
Vi 500 80 Shore A black from - 15 C to +200 C suited for endless vulcanisation
Vi 563 70 Shore A black from - 15 C to +200 C
Vi 564 70 Shore A black from -15 C to +230 C use to 230 C
Vi 569 80 Shore A black from -15 C to +200 CDVGW approval according to DIN EN 682 type GB
and DIN EN 549
Vi 576 80 Shore A black f rom -15 C to +200 C for oxygen armatures, uses to 150 C/25 bar BAM re lease
Vi 580 80 Shore A black from -15 C to +200 C
Vi 590 90 Shore A black from -15 C to +200 C
Vi 600 70 Shore A green from -15 C to +200 C increased chemical resistance
Vi 650 75 Shore A green from -15 C to +200 C suited for endless vulcanisation
Vi 670 80 Shore A green from -15 C to +200 C
Vi 675 75 Shore A red from -15 C to +200 C
Vi 700 90 Shore A green from -15 C to +200 C
Vi 800 75 Shore A black from -5 C to +200 C high resistance to chemicals
Vi 890 90 Shore A black f rom -15 C to +200 C high resistance to explosive decompression
Vi 965 65 Shore A black from -15 C to +200 C
Vi 970, G 70 Shore A green from -15 C to +200 C
Vi 975 75 Shore A black from -15 C to +200 C
FVMQSi 970, FL 70 Shore A blue from - 60 C to +200 C
very good low-temperatures exibility and resistance to
chemicals
Si 971, FL 70 Shore A blue from -60 C to +200 C
very good low-temperatures exibility and resistance to
chemicals
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18
Multi-purposely applicable
with robust materials
NBR materialsApplication areas:
Multi-purposely applicable material
for various industrial areas, et al. in
pneumatic and hydraulic applications
or in gas supply.
Properties/advantages:
Basic elastomer:
Acrylnitrile butadiene rubber
Sulphur and as exception
peroxidically cross-linked
Good mechanical properties
Good resistance to oil and fat
Weakness with water vapour
HNBR materialsApplication areas:
Multi-purposely applicable material
for a large variety of industrial areas,
et al. in pneumatic and hydraulic
applications.
Properties/advantages:
Basic elastomer:
Hydrated nitrile
butadiene rubber
Periodically
cross-linked
High resistance
to additive-containing mineral
oils
Low gas and steam
permeability
Good mechanical
properties
Good resistance to oil and fat
Its always best to consult a professional.
So why not contact our Application Technology department
and take advantage of our expert knowledge!
+49 (0)4101 50 02-26e-mail: [email protected]
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19
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
HNBRHNBR 600 70 Shore A black from -20 C to +150 C
HNBR 610 90 Shore A black from -20 C to +150 C
NBR
P 370 85 Shore A black from - 20 C to +120 C
P 427 90 Shore A black from - 20 C to +120 C
P 430 45 Shore A black from -20 C to +120 C
P 431, A 75 Shore A black from -10 C to +120 C
P 465 65 Shore A black from -20 C to +120 C for endless vulcanisation
P 520 70 Shore A black from -20 C to +120 Caccording to the recommendation of KTW (plastics in
drinking water) D1 and D2
P 549 70 Shore A black from -20 C to +120 C DVGW approval according to DIN EN 549
P 550 70 Shore A black from -20 C to +120 C DVGW approval according DIN EN 682 and DIN EN 549
P 574 55 Shore A black from -20 C to +120 C
P 583 70 Shore A black from -25 C to +120 C
P 584, RF 70 Shore A black from -50 C to +120 C use to -50 C
P 682 70 Shore A black from -20 C to +120 C DVGW approval according to DIN EN 682
P 700 70 Shore A black from - 40 C to +120 C very good low-temperature exibility
P 745 45 Shore A black from -20 C to +120 C
P 750 50 Shore A black from -20 C to +120 C
P 755 55 Shore A black from -20 C to +120 C
P 760 60 Shore A black from -25 C to +120 C
P 772 70 Shore A black from -25 C to +120 C
P 774 70 Shore A black from -25 C to +120 C not EU origin
P 775 75 Shore A black from -25 C to +120 C
P 777 70 Shore A black from -20 C to +120 C
P 778 70 Shore A black from -25 C to +120 C not EU origin
P 780 80 Shore A black from -25 C to +120 C
P 780, RF 80 Shore A black from -50 C to +120 C very good low-temperature exibility
P 790 90 Shore A black from -20 C to +120 C
P 792 90 Shore A black from - 20 C to +120 C
P 870 70 Shore A grey from -20 C to +120 C peroxidically cross-linked, unplasticised
P 880 80 Shore A grey from -20 C to +120 C peroxidically cross-linked, unplasticised
P 990 90 Shore A black from -20 C to +120 C
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Heat resistance and low-temperature exibility
of FEP- and PFA-encapsulated O-Rings
21
In need of something special?PTFE materials and FEP-coated O-Rings
PTFE materialPTFE is a full uoropoly-
mer with an exceptionally
high melt viscosity. There-
fore the thermic resistance is
tremendous even in continuous
operation over many thousand hours.
Additionally PTFE is nearly universally
resistant to chemicals. Even aggressive
acids such as aqua regia (nitrohydro-
chloric acid) cannot corrode PTFE.
Moreover, PTFE has many further posi-
tive qualities, such as excellent electrical
insulation and anti-adhesive behaviour,
good dry-running properties and low
heat conductivity. However, since PTFEis a very hard an inelastic material, there
are restrictions in the applicability. Fur-
thermore PTFE cannot be elongated a
fact to be considered on assembly.
These features make the PTFE seal ma-
terial of COG a material that is universally
applicable for very different industries.
As a result, PTFE is also used in the
food, medical and pharmaceuticals
industries.
FEP-encapsulated O-RingsFEP-encapsulated O-Rings offer both:
very high resistance to a wide range of
media and simultaneously good elas-
ticity. This is due to the 2-component
system of these O-Rings. FEP-encap-
sulated O-Rings have an elastic core
made of FKM or Silicone (VMQ). Each
elastic core is coated with a thin skin
of FEP. This combination of excellent
resistance and good elasticity creates
a wider range of application. While
the O-Ring core offers the necessary
elasticity, the FEP-coating is resistant
to chemical media.
PFA for
highest temperatures
In addition to FEP-coatings, COG also
offers PFA-coatings. PFA is nearly as
chemically resistant as PTFE and has the
same properties. Moreover PFA-coated
O-Rings may be exposed to higher tem-
peratures than FEP-coated O-Rings,
even retaining its low-temperature ex-
ibility.
In general we have FEP-coated O-Rings
with Silicone or FKM cores and core
sizes between 1,5 and 19 mm in stock.
We deliver FEP- and PFA-coated O-Rings
as BLF-standard (Bleed Line Fee) without
additional charge. BLF-standard means the
weld area of the coating has no impres-
sion/scratch mark.
If required all FEP- and PFA-coated
O-Rings can be marked with an individual
white mark on the core. Enquire about
further information.
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
PTFE PT 950 95 Shore A white from -200 C to +260 Chigh resistance to chemicals,
wide temperature operating range
FEP/FKM FEP 90-95 Shore A black from -20 C to +204 C high resistance to chemicals and to heat
FEP/VMQ FEP 85-90 Shore A red from -60 C to +204 Chigh resistance to chemicals and to heat, good cold
properties
PFA/FKM PFA 90-95 Shore A black from -20 C to +260 C high resistance to chemicals and to heat
PFA/VMQ PFA 85-90 Shore A red from -60 C to +260 Chigh resistance to chemicals and to heat, good cold
properties
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22
Many manufacturers and operators in the oil
and gas industries as well as in the compressor
manufacturing business and in compressed
air conditioning have difculties with explosive
decompression and its consequences, since
conventional elastomer sealings cannot with-
stand the intense strain.
What happens during
explosive decompression?
Great pressure causes gas to diffuse into the
sealing material. Is the pressure reduced,
the gas is emitted again. In case of
extremely sudden decompression thegas is released in an explosive way
and the elastomer material is either
torn in various places or bubbles
form on the surface. In both cases
the sealing is damaged so badly that
it cannot seal properly anymore.
Conventional O-Ring materials are not
applicable under these circumstances,
as their resistance against such force
is not sufcient. The only elastomers that
can be used are those especially designed
with very good physical properties (e. g. high
resistance to increased tearing and module).
Explosive decompression
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
FKM Vi 890 90 Shore A black from -15 C to +200 C high resistance to explosive decompression
In applications of the natural gas production,
such as e.g. pig traps, gate valves, ball cocks
and other regulating valves, the use of these
materials has proved successful in avoiding
damages to the sealings caused by explosive
decompression and consequently avoiding
costly leakages. Additionally this material has
been tried and tested in high pressure com-
pressor construction and in endurance tests
carried out in oil production.
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23
Materials for vacuum applications
In general every material emits gas, no matter what the ambi-
ent pressure. However the emission rate generally increases
as the ambient pressure is reduced. The highest emission oc-
curs in a vacuum, therefore the lower the emission, the better
Its always best to consult a professional.
So why not contact our Application Technology department
and take advantage of our expert knowledge!
+49 (0)4101 50 02-26e-mail: [email protected]
the material is suited for applications in vacuum technology.
Sealing materials applied in this eld must meet exceptionally
high demands. Our customers can choose from variety of tried
and tested materials for applications in vacuum technology.
For O-Rings with large inside diameter (min. 1.400 mm) we
recommend the endless vulcanization process (see p. 28).
Our experienced engineers from the Application Technology
department will gladly assist you in choosing the ideal mate-
rial for your purposes.
ASTM
D 1418ISO1629
COGnumber Hardness Colour
Operatingtemperatures Properties
FKM
Vi 370 70 Shore A black from -15 C to +200 C
Vi 400 65 Shore A black from -15 C to +200 C
Vi 455 55 Shore A black from -15 C to +200 C
Vi 465 67 Shore A brown from -15 C to +200 C suited for endless vulcanisation
Vi 500 80 Shore A black from -15 C to +200 C suited for endless vulcanisation
Vi 564 70 Shore A black from -15 C to +230 C use to 230 C
Vi 580 80 Shore A black from -15 C to +200 C
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24
At COG we employ a special production method to produce
precision O-Rings according to DIN 3771 with a length of up
to 3.000 mm, variable cord sizes and qualities of material.
In this special production method of endless vulcanisation
the vulcanisation process is carried out in a consistently
even and thorough way. O-Rings produced this way match
precision-O-Rings of smaller dimension produced with
conventional methods.
Compared to the conventional methods of manufacturing
special sized O-Rings, such as O-Rings with vulcanised or
glued joints, this method keeps tolerances to a minimum and
therefore grants very high precision. Its other big advantage
over conventional methods is that, due the consistency of
the vulcanisation the joints no longer bear a weakness. Thisprovides a more durable seal of considerably higher quality
in a variety of applications, e. g. also in high vacuum areas or
in gaseous media.
Endless vulcanisationHighest precision with large diameters too
Advantages
Very tight dimension tolerances according to DIN 3771
Evenly sized cords throughout the O-Ring-perimeterVery good surface quality
Low cost of tools compared to compression
moulded O-Rings
Any chosen inside diameter from approx. 1.400 mm
to 3.000 mm producible
ASTMD 1418
ISO1629
COGnumber
Hardness Colour Operating
temperaturesProperties
FKM
Vi 465 55 Shore A black from -15 C to +200 C
Vi 500 80 Shore A black f rom -15 C to +200 C su ited for endless vulcanisation and for us ing vacuum
Vi 650 75 Shore A green from -15 C to +200 C suited for endless vulcanisation
NBR P 465 65 Shore A black from -20 C to +120 C for endless vulcanisation
EPM EP 380 80 Shore A black from -35 C to +180 C peroxidically cross-linked; suited for endless vulcanisation
We can currently produce the following materials and cord
sizes with the endless vulcanisation method:
Cord sizes:
FKM and EPM qualities in the cord sizes 5 to 14 mm and NBR in the cord sizes 8 to 14 mm
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25
Moulded partsWhat many do not know is that in addition to our
core precision-O-Ring business, COG produces
moulded parts as well. The experience and ex-
pertise we have gained over decades working
with elastomer seal compounds we also put into
the manufacturing of moulded parts. We can
produce rotationally symmetrical geometries
based on customer drawings from almost all
standard materials in lots of up to approx. 1,000
pieces. Our companys own tool design and
construction capability enables costeffective
Special services
In addition to our extensive range of seal products, COG can offer a variety of
special services. We have only listed a few keywords.
Please contact our COG team for more information.
Colour coding of O-Rings with dots
Primary and individual packaging
Subsequent cleaning in de-ionised water
Subsequent treatment to remove PWIS (paintwetting impairment substances)
100% automated, optical dimensional inspection (AD < 80 mm)
Special labels also with customised bar coding
EDI connection
Certicate of compliance as per EN 10204 2.1
Certicate of compliance as per EN 10204 2.2
Inspection certicate as per EN 10204 3.1
VDA Initial sample inspection report
Manufacturers certicate M as per DIN 55 350 part 18
Chamber of Commerce (IHK) certicate of origin for export
Many more.
Not only O-Rings
production even for lowvolume orders. The
external diameter of the required moulded parts
may reach up to 1,400 mm consult us if you
require larger diameters. Moulded parts using
rotationally symmetrical geometries include: at
seals, lip seals, proled seal rings, dairy pipe
screw connections, clamp connections, sealing
collars, etc.
Please contact us directly to discuss the type of
moulded parts we can produce for you!
AFLASis a registered trademark of the ASAHI GLASS Co. Ltd.
Vitonis a registered trademark of the company Dupont Per formance Elastomers
For furtherinformation please
have a look at
www.COG.deor contact us
directly.
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EXPRESS
SERVICE
26
* On certain occasions, such as plant holidays, special holidays or other in-house occurrences, our workdays may differ from
legal workdays. You can receive more information on this matter from our internal Sales department.
If worst comes to worse and no fur ther delay is possible we at
COG offer our customers an express production service. This
special service is supposed to offer a loophole when caught
in dire straits. We can produce those high quality precision
O-Rings not in stock within 5 to 7 workdays*. These orders
are put onto the fast lane of our cleverly devised production
processes and delivered in the shortest of times.
Especially for our express service we constantly have eight
different, frequently used compounds in stock. These include
FKM, FEPM, VMQ, HNBR, NBR and EPDM compounds. As
long as ingredients are in stock, we can produce any other
mixtures on request in this express manner. Do contact us if
you need help!
COGexpress productionWhen the pressure is on:
Express production essentials:Production time between 5 and 7 work days*
8 different compound mixtures constantly in stock
Max. quantity depends on the size of the O-Rings
Express charge: 250 EUR at, plus VAT
Deadline guarantee:
If COG does not keep to the conrmed deadline for the
express delivery you only pay the merchandise value.
** In workdays.
Quality Material Hardness
in Shore A
Colour Properties Delivery time** on orders placed
before 10 a.m. after 10 a.m.
AP 310 EPDM 70 black FDA approval, peroxidically cross-linked 5 6
Vi 981 FEPM 75 black Excellent resistance to chemicals 6 7
Vi 500 FKM 80 black 6 7
Vi 564 FKM 70 black 6 7
Vi 665 FKM 75 blue FDA approval 6 7
HNBR 610 HNBR 90 black 5 6
P 583 NBR 70 black 5 6
Si 820 VMQ 70 red BfR and. FDA approval 5 6
Delivery times for COG express production
External diameter in mm Maximum quantity
220 60
221 - 550 40
551 - 1400 25
Maximum quantity Simple procedures:Simply pay is the merchandise value of the O-Rings plus
express charge ( 250,- plus VAT) no minimum regard-
ing quantity or value with this service
One order,one delivery date,
one additionalcharge:
250 EURflat, plus VAT
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COG is based in Germany in the metropolis
region of Hamburg, in close proximity to the
Hamburg port and the international airport.
Hamburg is known as The Gate to the World.
And not without reason!
The easy access to all means of transportation
and the possibilities therefore provided are
strategically signicant for our export activities.If necessary, we despatch orders that reach us
before 3 p.m. the very same day all over the
world. On request we deliver by courier asap
mostly even the next workday.
Distance is relative.
Ordered and dispatched all over the world in one day.
An overview of the advantages of
COGs stock and logistics:
Immediate availability for delivery
Europes largest O-Ring warehouse
(more than 45,000 items kept in stock for immediate delivery)
State of the art storage and communication technology
If required, orders placed before 3 p.m. are dispatched the same day
provided parts are in stock
Storage provision for customers incl. call-off agreement for buffer-type storage
Overview of daily stock on hand at www.cog.de
For some of our customers that means:
COG so far away yet so close!
And from our point of view:
distance is relative and close customer relation goes beyond borders.
27
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C. Otto Gehrckens GmbH & Co. KG
Seal Technology Dichtungstechnik
Gehrstcken 9 25421 Pinneberg Germany
+49 (0)4101 50 02-0
+49 (0)4101 50 02-83
www.cog.de [email protected]
2010-03
C.
OttoGehrckensGmbH
&Co.
KG
Errorsan
damendmentsexcepted.mario-rossi.org