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Germany |
C. Otto Gehrckens |
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Offer Profile
As an independent
manufacturer we belong to one of the leading supplier of precision O-rings
and Elastomer seals.
COG delivers from Europe’s largest O-ring stock most various materials,
including FKM an FFKM.
Besides, our developers are always happy to meet any specific requirements
of your industry.
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Product Line Up
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O-Rings
COG is absolutely uncompromising with the quality of
their products. Because this is the reason why our clients are among the
best in their respective industries.
Come and test over 100 years of experience and innovation!
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The ring is important.
- Over 45,000 items in stock
- In-house mixing, mixture development and production
- also small-scale production
Our product range includes:
- O-rings, produced according to DIN 3771: All current materials: CSM,
CR, EPDM, EPM, FEPM, FFKM, FKM, FVMQ, HNBR, IIR, NBR, NR, PTFE, PVMQ, VMQ.
- Inner diameter from 0.74 to 1400 mm; Strength of thread from 0.6 to 30mm
- With the production technique Endless Vulcanisation: all inner diameters
between 1400 mm and 3000 mm possible for FPM and EPM compounds with a cord
diameter from 5 to 14 mm and for NBR compounds with a cord diameter from 8
to 14 mm.
- Shape: In small ranges: sealing collars, flat rings, square rings can be
produced from a model or sketch from the above mentioned materials.
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Perlast®
For some applications there is no alternative to a
perfluorelastomer. In thoses cases it is good to know if you can trust in
the extraordinary Perlast® compound from COG. As a state-of-the-art product
Perlast® combines PTFE resistance to chemicals and heat with FPM elastomer
properties. It is used where other elastomers can not do the job and maximum
reliability is required. Special Perlast® materials compliant with FDA, USP
Class VI and clean room requirements are used in e.g. in the pharmaceutical
and food industries.
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Perlast® – a class for itself.
The Perlast® range of elastomers offer performance
characteristics that span the most demanding of applications in industries.
Perlast®'s flexibility provides you with a number of advantages. The
combination of in-house tooling,extensive range of material grades and rapid
production, means that non-standard O-rings and custom components can be
supplied just as easily as a BS/AS standard sizes – with exceptionally short
lead times.
Advantages of Perlast®:
- Maximum chemical restistance of all elastic sealing materials
- High temperature stability up to 325 °C, depending to the used type
- Low compression set
- Excellent vacuum performance
- Flexibel in the application
- Appropiate material for various requirements
- Wide range of approvals/ licences
- Ring diameter up to 2000 mm possible
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Express Service
When speed is important!
If really necessary and when postponement is not possible, COG offers its
customers express production. This special service is to help users out of
an awkward situation. This means that high-quality precision O-rings which
are not in stock can be manufactured in between 5 and 7 working days*. These
orders are put in the “fast lane” in the sophisticated production process
and are delivered in the shortest possible time.
*In special cases such as company and special holidays or also other
internal company incidents, the work days may differ from the statutory
working days.
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Express production
A total of 8 different frequently used materials are
stocked continuously at COG specifically for the express service. These
include FKM, FEPM, VMQ, HNBR, NBR and EPDM compounds. On request other
mixtures can also be produced using the express production process provided
these mixtures are in stock. You will need to contact our sales department
here first.
Key data for express production:
- Production time of between 5 and 7 work days*
- 8 different material mixtures in continuous stock
- Maximum quantity depends on the size of the O-rings
- Express surcharge: flat rate of 250 EUR plus VAT.
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