COG Broschuere Industrie ENG

8/9/2019 COG Broschuere Industrie ENG

1/28Pr

emium

quality

since

1867

When it matters ...

Elastomer sealsfor highest demands


2/28

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.


3/28


4/28

4

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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5

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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6

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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7

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 460 70 Shore A black from -5 C to +120 C use to -5 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 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




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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8

ASTMD 1418

ISO1629

COGmaterial



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 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 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 970, G 70 Shore A green 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



9/28

9

ASTMD 1418

ISO1629

COGmaterial



NBR

P 370 85 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 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 774 70 Shore A black from -25 C to +120 C not EU origin 23



P 778 70 Shore A black from -25 C to +120 C not EU origin 23


P 780, RF 80 Shore A black from -50 C to +120 C very good low-temperature exibility 12, 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


NR

K 545 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 865, R 65 Shore A transparent f rom -55 C to +200 C very good low-temperature exibility 19



10/28

10

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


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


11/28

11

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


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


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.


12/28

12

Materials for increased

mechanical strain

ASTMD 1418

ISO1629

COGnumber



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


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


Very good resilienceHigh gas density

Good resistance to fuels and many technically common

oils, especially to oils with higher aromatic content


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.


13/28

13

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 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



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


applications. The materials featured here

have at least one certicate of approval and

were designed especially for the use in those

applications.


14/28

14

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


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.


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.


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


15/28

15

ASTMD 1418

ISO1629

COGnumber



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 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






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 865, TR 65 Shore A transparent from -55 C to +200 C very good low-temperature exibility


16/28

16

FVMQ/FluorSilicone

materials

Application areas:

Use in production methods with a

wide range of temperatures.


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.


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.


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


17/28

17

ASTMD 1418

ISO1629

COGnumber



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 400 65 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 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 970, G 70 Shore A green 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


18/28

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.


Basic elastomer:

Acrylnitrile butadiene rubber

Sulphur and as exception

peroxidically cross-linked



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.


Basic elastomer:

Hydrated nitrile

butadiene rubber

Periodically

cross-linked

High resistance

to additive-containing mineral

oils

Low gas and steam

permeability

Good mechanical

properties







19/28

19

ASTMD 1418

ISO1629

COGnumber



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 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 550 70 Shore A black from -20 C to +120 C DVGW approval according DIN EN 682 and DIN EN 549



P 584, RF 70 Shore A black from -50 C to +120 C use to -50 C


P 700 70 Shore A black from - 40 C to +120 C very good low-temperature exibility






P 774 70 Shore A black from -25 C to +120 C not EU origin



P 778 70 Shore A black from -25 C to +120 C not EU origin


P 780, RF 80 Shore A black from -50 C to +120 C very good low-temperature exibility



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



20/28


21/28

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



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


22/28

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



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.


23/28

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





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 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



24/28

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



FKM


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


25/28

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.


26/28

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


27/28

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


28/28

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

Documents

COG Broschuere Industrie ENG