elastomer seals - startseite · elastomer seals for highest demands. 2 ... application technology...

Premium quality

since 1867When it matters ...

Elastomer seals for highest demands

2

For the benefit of our customersEurope’s largest O‑Ring warehouse

Uncompromising premium quality: C. Otto Gehrckens – COG for short – has offered its customers first-rate quality for over 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 190 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 Europe’s largest O‑Ring warehouse.

As an independent manufacturer based in Pinneberg near Hamburg in Germany COG has been family owned and managed for five 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 define 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 further information please

have a look at

www.COG.de or contact us

directly.

3

COG at a glance

ContentsDemands on modern sealings ............................................. 4Standards overview .............................................................. 5Product overview .................................................................. 7Materials for aggressive media ............................................. 10Materials for ranges of extreme temperatures ..................... 12Materials for higher mechanical stress ................................. 14Materials for gas-/oxygen-applications ................................ 15Perfluoro elastomer materials (FFKM) .................................. 16NBR/HNBR materials ............................................................ 22CR/IIR/NR materials .............................................................. 24FEP-/PFA-coated and PTFE materials ................................. 25Materials against explosive decompression ......................... 26Moulded parts and special services ..................................... 29Express manufacturing ......................................................... 30

• Founded in Pinneberg near Hamburg in 1867• Independent family‑owned company with more than 190 employees• Optimised delivery service using our modern logistics centre• Quality management per DIN EN ISO 9001 standards• Environment management in compliance with DIN EN ISO 14001• Europe’s largest O‑Ring warehouse

(more than 45,000 items kept in stock for immediate delivery)• Tools available for more than 15,000 different O‑Ring dimensions• In‑house toolmaking• Close cooperation with leading raw material manufacturers• In‑house compounding and compound development• Certifications and approvals for many materials

e. g. BfR, KTW, DVGW, NSF/ANSI 61

4

Highest demands on modern sealings

Due to the continuous improvement of the manufacturing processes regarding effectiveness and efficiency 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 definitions 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 have we been able to pleasantly surprise our customers with new sealing solutions.

Standards for precision-O-Rings: 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 final products. COG exclusively produces and sells precision‑O‑Rings abiding by the standard ISO 3601. The ISO 3601 is an international standard 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).

For more information about the permitted deviations of O-Rings according to ISO 3601 and housing for O-Ring seals please have a look at www.cog.de/en/o-rings-products.html

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 certificates for the employed materials in those fields are indispensable. It is always best to seek professional advice in these matters. Why not contact our engineers in the Application Technology department and benefit 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/Standards Appropriate

COG material

Recommendation made by Germany’s Bundesanstalt für Materialforschung und

–prüfung (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 plants DIN 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

pipelinesDIN EN 682 P 550, P 682, Vi 569

It’s 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 02-26 e-mail: [email protected]

6

In engineering, where the critical parts, such as sealings e. g., are concerned, the engineer or user is confronted first 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. However the cost of those materials exceeds most budgets by far and therefore the final product might not be put on the market at a marketable price – especially in times like today – an argument of increasing importance. Therefore a thorough examination is essentially important when choosing the material in order to determine 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? Which temperature has the medium to be sealed? 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 specifications for your project or should other questions occur, our Application Technology team will be happy to advise you thoroughly and competently!

7

Product overview (part 1 to 3)ASTMD 1418

ISO1629

COG material Hardness Colour Operating

temperatures Special 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 19






EPM EP 380 80 Shore A black from ‑35 °C to +180 °C peroxidically cross‑linked; suited for endless vulcanisation 19

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 °C high resistance to chemicals, high heat resistance; not EU origin 25

FEP/VMQ FEP 85‑90 Shore A red from ‑60 °C to +204 °C high resistance to chemicals, high heat resist‑ance, good coldness properties; not EU origin 25

PFA/FKM PFA 90‑95 Shore A black from ‑20 °C to +260 °C high chemical resistance, high heat resistance; not EU origin 25

PFA/VMQ PFA 85‑90 Shore A red from ‑60 °C to +260 °C high resistance to chemicals, high heat resist‑ance, good coldness properties; not EU origin 25

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

8

ASTMD 1418

ISO1629



FFKM

Perlast® G60A 60 Shore A black from ‑15 °C to +260 °C high resistance to chemicals, good mechanical properties 13, 17



Perlast® G90A 86‑90 Shore A black from ‑10 °C to +260 °C high resistance to chemicals, good mechanical properties, ideal for high pressure applications 13, 17

Perlast® G75B 79 Shore A black from ‑15 °C to +325 °C high resistance to chemicals, excellent mechani‑cal properties, high heat resistance 11, 13, 17

Perlast® G92E 90 Shore A black from ‑15 °C to +260 °C high resistance to explosive decompression 17, 26

Perlast® G75H 80 Shore A white from ‑15 °C to +320 °Chigh heat resistance, ultra‑pure, low rate of helium leakage, excellent plasma resistance, developed for the semiconductor industry

13, 16, 17, 27

Perlast® ICE G75LT 80 Shore A black from ‑40 °C to +250 °C excellent low temperature and chemical

resistance to a broad range of media 12, 16, 17

Perlast® G75M 75 Shore A black from ‑15 °C to +260 °C good mechanical properties 14, 17

Perlast® G67P 63 Shore A translucent from ‑15 °C to +275 °Chigh heat resistance, ultra‑pure, low rate of helium leakage, plasma resistance, developed for the semiconductor industry

13, 17, 27

Perlast® G74P 74 Shore A translucent from ‑15 °C to +275 °Chigh heat resistance, ultra‑pure, low rate of helium leakage, plasma resistance, developed for the semiconductor industry

13, 17, 27

Perlast® G75TX 75 Shore A black from ‑15 °C to +327 °C all‑rounder, high temperature resistance,very low compression set 11, 13, 17

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 flexibility 12, 21

Vi 100 70 Shore A red from ‑30 °C to +200 °C good low-temperature flexibility 12, 21

Vi 100, S 70 Shore A black from ‑30 °C to +200 °C good low-temperature flexibility 12, 21

Vi 110, S 80 Shore A black from ‑30 °C to +200 °C good low-temperature flexibility 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 480 80 Shore A black from ‑15 °C to +200 °C high resistance to chemicals, hot water and water vapour 11, 21

Vi 500 80 Shore A black from ‑15 °C to +200 °C suited for endless vulcanisation and for using vacuum 21, 27


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 °C DVGW approval according to DIN EN 682 type GB and DIN EN 549 15

Vi 576 80 Shore A black from ‑15 °C to +200 °C for oxygen armatures, uses to 150 °C/25 bar BAM release 15

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 895 90° IRHD black from ‑45 °C to +225 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard 21, 26


Vi 970, G 70 Shore A green from ‑15 °C to +200 °C 21


Product overview (part 2 to 3)

9

ASTMD 1418

ISO1629



FVMQSi 970, FL 70 Shore A blue from ‑60 °C to +200 °C very good low-temperature flexibility and

resistance to chemicals 12, 21

Si 971, FL 70 Shore A blue from ‑60 °C to +200 °C very good low-temperature flexibility and resistance to chemicals 12, 21

HNBR

HNBR 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

HNBR 895 89° IRHD black from ‑25 °C to +180 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard 23, 26

IIR BT 480 65 Shore A black from ‑40 °C to +140 °C 24

NBR

P 370 85 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 °C according to the recommendation of KTW (plastics in drinking water) D1 and D2 23

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 °C DVGW approval according DIN EN 682 and DIN EN 549 15, 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 flexibility 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 flexibility 12, 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


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 °C high resistance to chemicals, wide temperature operating range 25

VMQ

Si 810, S 70 Shore A black from ‑55 °C to +200 °C very good low-temperature flexibility 19

Si 850, R 50 Shore A red from ‑55 °C to +200 °C very good low-temperature flexibility 19




Si 865, R 65 Shore A transparent from ‑55 °C to +200 °C very good low-temperature flexibility 19

Product overview (part 3 to 3)

10

Developers, Engineers and users often encounter difficulties 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 dif‑ferent materials for use in aggressive environments and can fulfil the most diverse requirements with their large product range.

HF 875 (FKM)This multi‑purpose sealing material, a highly fluoric 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 fields of application range from chemical industries to engineering to process engineering – in short - all fields 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 • Broad operating temperature range

from ‑15°C to +200°C• Very appealing price especially

compared to FFKM

Highest demands materials exposed to aggressive media

Vi 981 (FEPM)This Viton® Extreme‑ETP sealing material is an interesting solution for users with very high demands. The Vi 981 compound is multi‑purposely applicable due to its good physical and excellent mechanical properties. Moreover, the outstanding chemi‑cal resistance of fluoric rubber is improved further by the compound Vi 981. At the same time heat resis‑tance and low-temperature flexibility persist.

Properties:• High quality FEPM compound• Very good resistance to

chemicals• Excellent mechanical values• Excellent ageing resistance• Good heat resistance and

low-temperature flexibility• 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 difficulties 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• Broad operating temperature range

from ‑15°C to +200°C

11

Vi 480 (FKM)Vi 480 has been specially developed for use in applications where not only a high degree of resistance to chemical influence but also resistance to hot water and water vapour is required. Under these conditions most traditional FKM substances prove inadequate, as they suffer an extreme increase in volume. Specially designed for use in such situations, the FKM compound Vi 480 moreover shows an extremely low compression set even under these difficult conditions, offering the ideal basis for long‑term leakage‑free use. Due to its characteristics this FKM is ideally suited for applications in fittings, valves, pumps, electric cables, pipes, drives and other applications in the power plant and process technology.

Properties:• Excellent chemical resistance• Very good resistance to hot water and water vapour• Low compression set• Broad operating temperature range

from ‑15 °C to +200 °C• Excellent resistance to biogenic and traditional fuels • Good resistance to solvents• Good mechanical properties• Universal all‑rounder

Perlast® G75B (FFKM)The top all‑rounder compound Perlast® G75B is characterized by an increased chemical and acid resistance as well as by excellent mechanical properties. Perlast® G75B offers a high resistance against vapour and hot amines and is also suitable for vacuum applications. In addition to that, this perfluoroelas‑tomer has low permeability and as a result, it is less prone to swelling, leading to extended in‑service performance in, for example, valves, pumps and mechanical seals. Temperature stability up to 325°C.

Properties:• High temperature resistance up to +325 °C• Excellent chemical resistance• Very good mechanical properties• High vapour resistance• Very high sealing efficiency• High pureness• Less than 2% swelling in MIL-L-23699C jet-oil

after 336 hours at +200 °C• Long‑term sealing integrity even after a long

period of time in high temperature application

ASTMD 1418

ISO1629

COGnumber Hardness Colour Operating

temperatures Properties

FFKMPerlast® G75B 79 Shore A black from ‑15 °C to +325 °C high resistance to chemicals, excellent mechanical

properties, high heat resistance

Perlast® G75TX 75 Shore A black from ‑15 °C to +327 °C high resistance to chemicals, high heat resistance, very low compression set

FKM

Vi 480 80 Shore A black from ‑15 °C to +200 °C high resistance to chemicals, hot water and water vapour

BF 750 75 Shore A black from ‑15 °C to +200 °C high resistance to biogenic media

HF 875 75 Shore A grey brown from ‑15 °C to +200 °C high resistance to chemicals

FEPM Vi 981 75 Shore A black from ‑10 °C to +200 °C high resistance to chemicals

12

Sealing materials used in cold environments need to meet special requirements. Even in these conditions the sealings used must possess the necessary flexibility in order to seal properly. In the field, users are confronted with various different defi nitions, therefore comparing materials by different manu‑facturers proves difficult. There are many different methods of measuring the material properties at low‑temperatures. The methods usually disclose different results of measurement. Therefore it is important to choose the method that gives accurate information on the functional efficacy of sealings.

Application in extreme temperatures

For this reason the COG material data regarding the appli cation in low‑temperatures refers to the “TR10 value” (temperature retraction value), unless specifically stated otherwise. This value describes the behaviour of a material in low tempera‑tures. The TR10 value is the temperature at which an elastomer can recover 10% of its elastomer restoring property. In certain appli cations 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.

Materials for low temperature applications

ASTMD 1418

ISO1629



EPDM AP 300 70 Shore A black from ‑50 °C to +140 °C high resistance to hot water and vapour, high ageing resistance

FFKM Perlast® ICE G75LT 80 Shore A black from ‑40 °C to +250 °C excellent low temperature and chemical resistance to a broad

range of media

FKM

LT 170 70 Shore A red from ‑40 °C to +200 °C very good resistance to chemicals, excellent ageing resistance, excellent low-temperature flexibility (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 from ‑30 °C to +200 °C good resistance to chemicals

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 °C in 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 resistance to oil and fat, good mechanical properties

P 700 70 Shore A black from ‑40 °C to +120 °C good resistance to oil and fat, good mechanical properties

P 780, RF 80 Shore A black from ‑40 °C to +120 °C good resistance to oil and fat, good mechanical properties

13

All data regarding the resistance in high and low temperatures apply to continuous application. Temperatures may peak a great deal higher.

Materials for high temperature applications

ASTMD 1418

ISO1629



FEPM AF 100 75 Shore A black from ‑10 °C to +230 °C very good resistance to hot water, vapour and chemicals and to H2S gases and oils

FFKM

Perlast® G60A 60 Shore A black from ‑15 °C to +260 °C high resistance to chemicals, good mechanical properties



Perlast® G90A

86‑90 Shore A black from ‑10 °C to +260 °C high resistance to chemicals, good mechanical properties, ideal

for high pressure applications

Perlast® G75B 79 Shore A black from ‑15 °C to +325 °C high resistance to chemicals, excellent mechanical properties,

high heat resistance

Perlast® G75H 80 Shore A white from ‑15 °C to +320 °C high heat resistance, ultra‑pure, low rate of helium leakage, exce llent

plasma resistance, developed for the semiconductor industry

Perlast® G67P 63 Shore A translucent from ‑15 °C to +275 °C high heat resistance, ultra‑pure, low rate of helium leakage,




Perlast®

G75TX 75 Shore A black from ‑15 °C to +327 °C all‑rounder, high temperature resistance, very low compression set

FKM Vi 564 70 Shore A black from ‑15 °C to +230 °C very good resistance to chemicals and ageing,good mechanical properties

14

Materials for increased mechanical strain

ASTMD 1418

ISO1629



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

FFKM Perlast® G75M 75 Shore A black from ‑15 °C to +260 °C all‑round compound, good mechanical properties,

capable for rotary seals

In certain applications the used elastomer sealings must withstand mechanical strain. Not all elastomer materials are equally suited for these fields of application. The materials featured on this page all have good mechanical resistance. Yet this does not mean they are generally applicable for all dynamic sealing applications. First of all it has to be determined 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 Application Technology team? Our engineers will be glad to assist you in choosing the right material for your purposes.

AU materialsProperties/advantages:

• Basic elastomer: polyester urethane rubber• Good mechanical properties• Very good resilience• High gas density• Good resistance to fuels and many technically

common oils, especially to oils with higher aromatic content

• Good low-temperature flexibility• Excellent oxygen and – ozone resistance

EU materialsProperties/advantages:

• Basic elastomer: polyether urethane rubber• Good mechanical properties• Very good resilience• High gas density• Good resistance to fuels and many technically

common oils, especially to oils with higher aromatic content

• Good low-temperature flexibility• Excellent oxygen and – ozone resistance• Good hydrolysis resistance

FFKM materialsProperties/advantages:

• Basic elastomer: Perfluoroelastomer• Peroxidically cross‑linked• Maximum chemical resistance of all elastic sealing materials• High thermal expansion coefficient• High temperature stability up to +325 °C,

depending on the grade used• Low compression set• Flexible in application

15

Sealing materials for gas and/or oxygen applications must meet special requirements. In Germany as well as other countries release certificates or certificate of approval is required in order to be able to use the materials in certain

NBR materialsProperties/advantages:

• Basic elastomer: Acrylnitrile‑butadiene rubber

• Sulphur cross‑linked• Good mechanical properties• Good resistance to oil and fat

Materials for gas/oxygen applications

FKM materialsProperties/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



FKM

Vi 569 80 Shore A black from ‑15 °C to +200 °C DVGW approval according to DIN EN 682 type GB; DVGW approval DIN EN 549

Vi 576 80 Shore A black from ‑15 °C to +200 °C for 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 certificate of approval and were designed especially for the use in those applications.

16

Perlast®. And safed.FFKM high-tech compound

For some applications there is no alter‑native to a perfluoroelastomer (FFKM/FFPM). In these cases it is good to know that you can trust in the extraor‑dinary Perlast® compound from COG. As a state‑of‑the‑art product Perlast®

combines the chemical and thermal resistance of PTFE with the elastomer properties of an FKM. It is used where other elastomers cannot do the job and maximum reliability is required. The Perlast® range of elastomers offers performance characteristics that span the most demanding of applications across various industries.

Advantages of Perlast®

• Maximum chemical resistance of all elastic sealing materials

• High temperature stability up to +327 °C, depending on the grade used

• Low compression set• Excellent vacuum performance• Flexible in application• Suitable compound for a wide

variety of demands• Wide range of approvals

Perlast® G75HPerlast® G75H is a synthetic pure compound, specially developed for the semiconductor and vacuum industry. It is suitable in an operating temperature range from ‑15 °C up to +320 °C. This compound has an excellent resistance to aggressive oxygen and fluorine based plasmas. Because of its extremely low outgassing properties Perlast® G75H is used in vacuum technology applications.

Properties:

• Operating temperature range from ‑15 °C up to +320 °C

• Excellent plasma resistance• Very good chemical resistance• Very good physical properties –

suitable for dynamic applications

Perlast® ICE G75LTThe high‑tech‑compound Perlast® ICE G75LT sets a revolutionary standard in sealing applications with extremely low temperatures. The long term temperature resistance down to ‑40 °C is achieved by the structural changes to the polymer itself. The compound is usable where low and / or high temperature performances are present and aggressive chemical conditions exist. Due to its low permeability the compound is also less prone to swelling and enables an extended in‑service performance in valves, pumps and mechanical seals.

Properties:

• Low temperature resistance down to ‑40°C over a long period of time

• Very good high temperature resistance up to +250 °C

• Low compression set• Excellent resistance to a broad

range of media• Exceptional acid and amine

resistance• Good mechanical properties• Installation without problems

even at low temperatures

17

Perlast® G80ABlack compound with an optimal cost‑ratio that can be used in various industries. This perfluoroelastomer offers an exceptionally high acid and amine resistance and as well an excellent resistance against chlorinate and solvent‑based media.

Properties:

• High temperature resistance up to +260 °C

• High chemical resistance• Excellent mechanical

properties• Wide range of applications

in chemical industries and refineries

Perlast® G75TXThe FFKM compound Perlast® G75TX sets new standards. With an operating temperature range from ‑15°C up to +327°C, an excellent chemical and acid resistance, a compression set of just 8%, the material performs well even in difficult applications. Due to its high thermal capability, low outgassing, excellent mechanical properties and a very good vapour resistance Perlast® G75TX is an all‑rounder for highest demands.

Properties:

• High temperature resistance up to +327 °C

• Excellent chemical resistance• Compression set from just 8%• Good mechanical properties• High vapour resistance

Perlast® G75B The top all‑rounder for all kinds of applications. Increased chemical and acid resistance as well as excellent mechanical properties. The compound offers a high resistance against vapour and hot amines – also suitable for vacuum applications.

Properties:

• High temperature resistance up to +325 °C.

• Excellent chemical resistance• Very good mechanical properties• High vapour resistance• High pureness• Universally applicable

ASTMD 1418

ISO1629



FFKM




Perlast® G90A 86‑90 Shore A black from ‑10 °C to +260 °C high resistance to chemicals, good mechanical properties, ideal for high pressure applications

Perlast® G75B 79 Shore A black from ‑15 °C to +325 °C high resistance to chemicals, excellent mechanical properties, high heat resistance

Perlast® G92E 90 Shore A black from ‑15 °C to +260 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard

Perlast® G75H 80 Shore A white from ‑15 °C to +320 °C high heat resistance, ultra‑pure, low rate of helium leakage, excellent plasma resistance, developed for the semiconductor industry

Perlast® ICE G75LT 80 Shore A black from ‑40 °C to +250 °C excellent low temperature and chemical resistance to a broad

range of media

Perlast® G75M 75 Shore A black from ‑15 °C to +260 °C good mechanical properties

Perlast® G67P 63 Shore A translucent from ‑15 °C to +275 °C high heat resistance, ultra‑pure, low rate of helium leakage, plasma resistance, developed for the semiconductor industry

Perlast® G74P 74 Shore A translucent from ‑15 °C to +275 °C high heat resistance, ultra‑pure, low rate of helium leakage, plasma resistance, developed for the semiconductor industry

Perlast® G75TX 75 Shore A black from ‑15 °C to +327 °C all‑rounder, high temperature resistance, very low compression set

18

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‑media• Good resistance to hot water

and vapour• Very good ageing and ozone

resistance• Good low-temperature flexibility• 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‑media• Good resistance to hot water

and vapour• Partially unresistant to vegetable

and animal oils/ fats• Very good ageing, UV and ozone

resistance• Good low‑temperature

flexibility

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

flexibility

19

ASTMD 1418

ISO1629



EPDM

AP 300 70 Shore A black from ‑50 °C to +140 °C peroxidically cross‑linked

AP 301 70 Shore A violet from ‑50 °C to +140 °C peroxidically cross‑linked




AP 381 80 Shore A violet from ‑50 °C to +140 °C peroxidically 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 flexibility

Si 850, R 50 Shore A red from ‑55 °C to +200 °C very good low-temperature flexibility




Si 865, TR 65 Shore A transparent from ‑55 °C to +200 °C very good low-temperature flexibility

20

FFKM materialsApplication areas: Use in various applications in industries with highest demands.

Properties/advantages:• Basic elastomer: Perfluoroelastomer• Peroxidically cross‑linked• Maximum chemical resistance

of all elastic sealing materials• High temperature stability up to +325 °C,

depending on the grade used• High thermal expansion coefficient• Low compression set• Excellent vacuum performance

FVMQ/FluorSilicone materials

Application areas: Use in production methods with a wide range of temperatures.

Properties/advantages:• Basic elastomer: fluorosilicone 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 materials for highest demands

FEPM materialsApplication areas: Use in various industrial applications with especially high demands.

Properties/advantages:• Basic elastomer: Viton® Extreme-ETP or Aflas®

• Peroxidically cross‑linked• Applicable in temperatures: ‑10 °C to +230 °C,

depending on the type• Very good resistance to acids, bases, ammonia, H2S

gases or Amine‑containing additives and corrosion inhibitors, alloyed motor and gear oils, brake fluids, 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

21

ASTMD 1418

ISO1629



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

FFKM Perlast® compounds on page 16/17

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 from ‑15 °C to +200 °C high resistance to chemicals

LT 170 70 Shore A red from ‑40 °C to +200 °C very good low-temperature flexibility

Vi 100 70 Shore A red from ‑30 °C to +200 °C good low-temperature flexibility

Vi 100, S 70 Shore A black from ‑30 °C to +200 °C good low-temperature flexibility

Vi 110, S 80 Shore A black from ‑30 °C to +200 °C good low-temperature flexibility

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 480 80 Shore A black from ‑15 °C to +200 °C high resistance to chemicals, hot water and water vapour

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 °C DVGW approval according to DIN EN 682 type GB and DIN EN 549

Vi 576 80 Shore A black from ‑15 °C to +200 °C for oxygen armatures, uses to 150 °C/25 bar BAM release



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 from ‑15 °C to +200 °C high resistance to explosive decompression

Vi 895 90° IRHD black from ‑45 °C to +225 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard


Vi 970, G 70 Shore A green from ‑15 °C to +200 °C


FVMQ Si 970, FL 70 Shore A blue from ‑ 60 °C to +200 °C very good low-temperatures flexibility and resistance to chemicals

Si 971, FL 70 Shore A blue from ‑60 °C to +200 °C very good low-temperatures flexibility and resistance to chemicals

22

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

• Peroxidically cross‑linked

• High resistance to additive‑containing mineral oils

• Low gas and vapour permeability

• Good mechanical properties

• Good resistance to oil and fat



23

ASTMD 1418

ISO1629



HNBR

HNBR 600 70 Shore A black from ‑20 °C to +150 °C

HNBR 610 90 Shore A black from ‑20 °C to +150 °C

HNBR 895 89° IRHD black from ‑25 °C to +180 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard

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 °C according 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 flexibility






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 flexibility



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


CR materialsApplication areas:Multi‑purposely applicable material for a variety of industrial areas.

Properties/advantages:• Basic elastomer: chloroprene

rubber• Similar properties to NBR, yet

slightly less resistant against acids, bases and media

24

ASTMD 1418

ISO1629



CR

Ne 280 80 Shore A black from ‑30 °C to +120 °C

Ne 447, FR 70 Shore A black from ‑35 °C to +120 °C unplasticised


Ne 460 70 Shore A black from ‑5 °C to +120 °C use to ‑5 °C






IIR BT 480 65 Shore A black from ‑40 °C to +140 °C

NR

K 545 45 Shore A black from ‑45 °C to +100 °C




Exotics – for particular applications

IIR material Application areas: Various industrial application areas et al. vacuum applications.

Properties/advantages:• Basic elastomer: Butyl rubber• Very low gas permeability• High resistance to oxygen and

ozone interferences • Good electrical properties• Not suitable for application in

mineral oils

NR materials Application areas: Despite the diversity of available types of synthetic rubbers with a great variety of material properties natural rubber is still sought after in certain niche areas.

Properties/advantages:• Basic elastomer: natural rubber• Highly flexible• Excellent physical properties

Heat resistance and low-temperature flexibility of FEP‑ and PFA‑encapsulated O‑Rings

25

In need of something special?PTFE materials and FEP-coated O-Rings

PTFE materialPTFE is a full fluoro‑

polymer with an excep‑tionally high melt viscos‑

ity. Therefore the thermic resistance is tremendous even in

continuous operation over many thou‑sand hours. Additionally PTFE is nearly universally resistant to chemicals. Even aggressive acids such as aqua regia (nitrohydrochloric acid) cannot corrode PTFE. Moreover, PTFE has many further positive qualities, such as excellent electrical insulation and anti‑adhesive behaviour, good dry‑running properties and low heat conductivity. However, since PTFE is a very hard and inelastic material, there are restrictions in the applicability. Furthermore PTFE cannot be elongated – a fact to be considered on assembly.

These features make the PTFE seal material of COG a material that is universally applicable for very different industries. As a result, PTFE is also used in the food, medical and pharmaceutical industries.

FEP-encapsulated O-Rings FEP‑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 flex‑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.

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



PTFE PT 950 95 Shore A white from ‑200 °C to +260 °C high 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 °C high 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 °C high resistance to chemicals and to heat, good cold properties

26

Many manufacturers and operators in the oil and gas industries as well as in the compressor manufacturing business and in compressed air conditioning have difficulties 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 the gas 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 sufficient. The only elastomers that can

be used are those especially designed with very good physical properties (e. g. high resist‑ance to increased tearing and module).

Explosive decompression

ASTMD 1418

ISO1629



HNBR HNBR 895 89° IRHD black from ‑25 °C to +180 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard, tested to NACE TM 0187 (sour gas) standard

FFKM Perlast® G92E 90 Shore A black from ‑15 °C to +260 °C high resistance to explosive decompression, tested to NORSOK M‑710 standard, tested to NACE TM 0297 (ED) standard

FKM

Vi 890 90 Shore A black from ‑15 °C to +200 °C high resistance to explosive decompression

Vi 895 90° IRHD black from ‑45 °C to +225 °Chigh resistance to explosive decompression, tested to NORSOK M-710 standard and total specification GS PVV 142 03/01, tested to NACE standards: TM 0297 (ED) & TM 0187 (sour gas)

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.

27

Materials for vacuum applicationsIn 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 field 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 vulcanisation 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.

ASTMD 1418

ISO1629



FFKM





Perlast® G75H 80 Shore A white from ‑15 °C to +320 °C high heat resistance, ultra‑pure, low rate of helium leakage, excel‑

lent plasma resistance, developed for the semiconductor industry

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


28

At COG we employ a special production method to produce precision O‑Rings according to ISO 3601 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. This provides 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 ISO 3601• Evenly sized cords throughout the O‑Ring‑perimeter• Very 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



FKM

Vi 465 55 Shore A black 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 and for using 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

29

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 company’s own tool design and construction capability enables cost–effective

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 (paint–wetting impairment substances)• 100% automated, optical dimensional inspection (AD < 80 mm)• Special labels – also with customised bar coding• EDI connection• Certificate of compliance as per EN 10204 – 2.1• Certificate of compliance as per EN 10204 – 2.2• Inspection certificate as per EN 10204 – 3.1• VDA Initial sample inspection report• Manufacturer’s certificate M as per DIN 55 350 part 18• Chamber of Commerce (IHK) certificate of origin for export• Many more.

Not only O-Rings

production even for low–volume 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: flat seals, lip seals, profiled 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!

AFLAS® is a registered trademark of the ASAHI GLASS Co. Ltd.Perlast® is a registered trademark of the Precision Polymer Engineering Ltd.Viton® is a registered trademark of the company Dupont Performance Elastomers

For further information please

have a look at

www.COG.de or contact us

directly.

30

* 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 further 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!

COG–express 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 flat, plus VAT

Deadline guarantee:If COG does not keep to the confirmed 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,‑ EUR plus VAT) – no minimum regarding quantity or value with this service

EXPRESS SERVICE

One order, one delivery date,

one additional charge:

250 EURflat, plus VAT

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 significant 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 COG’s stock and logistics:

• Immediate availability for delivery• Europe’s 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.

31

C. Otto Gehrckens GmbH & Co. KGSeal Technology • DichtungstechnikGehrstücken 9 • 25421 Pinneberg • Germany

+49 (0)4101 50 02‑0 +49 (0)4101 50 02‑83

www.cog.de • [email protected]

© 2

012-

06 •

C. O

tto G

ehrc

kens

Gm

bH &

Co.

KG

• E

rrors

and

am

endm

ents

exc

epte

d.

elastomer seals - startseite · elastomer seals for highest demands. 2 ... application technology...

Documents