O-rings are available in a wide range of sizes, hardnesses and colours. It is vital to understand what all three factors mean and how they affect applications, equipment and processes.
O-rings are available in a variety of colours, as each colour has a secret meaning. The colour can indicate the type of material on which the O-Ring is based and is set by industry standards. For many years, industry standards have been based on the common colours that come with these materials.
Sanshi Rubber can supply any O-Ring material in any colour, please contact us if you require more information.
Rear Resistance Colorful FKM Rubber O-ring
O-Ring Colours
O-Rings can come in a variety of colours. These are the standard colours of materials based on the industry. Sanshi Rubber can supply O-Rings in any colour for any material
O-rings come in a variety of colours and it is important to understand what these colours mean as your choice of O-ring will affect your overall process application.
Ultimately, different O-ring colours are used to help differentiate between different materials. Sanshi Rubber can provide O-Rings in a variety of colours using a wide range of materials.
Heat Resistance Colorful Silicone NBR O-ring
The good news is that we can order our O-Rings directly online here; however, if you have specific questions about O-Rings, colours and materials, please write at sale***************. or click this page for more information about O-Rings.
Yellow, Black and Green O-Rings
Black O-Rings
Black O-Rings are manufactured from EPDM and are best suited for applications such as heating, fire protection, drinking water and sanitary water.
They comply with EN 681-1 and have SECURFRABO patented system safety.
They can also withstand temperatures as low as -10 degrees and as high as over 110 degrees.
NR Black Rubber O Ring
Yellow O-ring
Manufactured with HNBR, you will find yellow O-rings for gas applications in accordance with standard EN 549.
These standards also differ in that EN 681-1 yellow O-rings are suitable for water and EN 549 yellow O-rings are suitable for gas.
The patented safety system SECURFRABO.
Yellow O-Rings are available for water and gases down to a minimum temperature of -20 degrees and a maximum temperature of +95 degrees.
For those O-Rings that are only available for gases, a minimum temperature of -20 degrees and a maximum of +70 degrees can be achieved.
Green O-Rings
Manufactured from FKM material, these O-Rings operate perfectly at high temperatures and fluctuating stress levels - making them ideal for systems such as solar.
They reach a maximum temperature of 160 degrees, but can reach a peak of 200 degrees in a short time if required.
Green NBR Rubber O-ring
O-Ring colour coding
O-Ring colours / O-Ring materials
Black/FFKM, NBR, EPDM, Fluoroelastomer, Alfas, Neoprene
Green/HNBR, HSN, Fluoroelastomer
Blue/Fluorosilicone rubber
High Visibility Green/NBR
Brown/Fluoroelastomer
Red/Silicone, PFAS, TES
Transparent/Polyurethane
White/NBR, Viton, silicone, EPDM, PTFE
Yellow/Buna N
O Ring
Each O-Ring material has different properties that make it suitable for different applications and processes. It is important to choose the most suitable material to provide the best seal for your application.
The use of different O-Ring compounds for sealing is recommended as new and innovative materials have been identified and used as suitable sealing products.
As mentioned earlier, colour coding O-rings in this way allows the industry to differentiate between different types of materials and, most importantly, improves their visibility in the application.
Sometimes coloured dots can also be applied to O-ring batches to help you handle your own stock. If you wish to include this element in your O-Ring order, the SSP can help you colour code it.
EPDM Rubber O-ring
Difference between black O-rings and green O-rings
Black O-Rings are mainly neoprene or NBR, or in some cases a mixture of these two materials. Until 1987, black O-rings were mainly the only coloured O-rings available; however, as new materials entered the market, different colours were needed to identify the different materials, mark their visibility and allow companies to check their suitability for specific and different applications. Black O-rings are most commonly used in automotive air conditioning applications.
Green O-rings are hydrogenated nitrile butadiene rubber, also known as highly saturated nitrile rubber, or more commonly known as HNBR. these O-rings are moulded in green into the rubber and are introduced with 134a refrigerant for high temperatures and fluctuating stress loads.
There is a requirement to simplify the O-Ring colour selection process; however, at present, these colours provide a clear picture of the changes that are taking place.
Sanshi Rubber offers a range of colored rubber o rings and can assist with colour coding for stock management. Our knowledgeable, experienced and friendly team are ready to help you find the best O-Ring material for your application.
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Sanshi Rubber wants to be your O-Ring supplier
At Sanshi Rubber, we have been supplying our customers with the O-Rings they need. We have learned a lot about manufacturing the best quality O-Rings on the market and how to help our customers purchase the best product for their specific application.
Shop our selection of O-Rings today and if you have any questions, please feel free to contact us or check out our knowledge base to help find the right answer. We look forward to exceeding your expectations in terms of quality and service.
If you have any questions on colored o ring. We will give the professional answers to your questions.