Guide on O-rings - POWER Rubber

Our present article aims to explain the concept of rubber o-rings. By reading the current entry, you will also learn about other technical seals operating on our Polish market.

For more information, please visit colored silicone o rings.

What are O-rings?

To understand O-rings better, let’s begin with the theoretical definition and follow it with some practical insights.

Theoretical Overview: What is an O-ring?

An O-ring, often referred to simply as a "ring seal," is a type of gasket with a round or O-shaped cross-section.

Practical Insights: O-rings

Rather than just defining them, let’s look into why O-rings are commonly regarded as the most popular technical seals.

Why are O-rings the most popular technical seals?

We can break down the reasons into several factors:

Ease of Use – Simple Installation

If you’ve ever worked with rubber O-rings, you know that their installation is straightforward, largely due to their flexibility.

Various Sizes of O-rings

The wide range of available sizes, from internal diameters to cross-sections, makes it easy to find the right fit for your needs. Multiple rubber compounds are available, extending the service life of these essential seals. More on these compounds later.

O-rings and Pricing

As price-sensitive consumers, the affordability of O-rings positively impacts their demand. Retail prices start as low as PLN 0.39 per piece. For wholesale purchases, you can contact POWER Rubber directly via email: power@powerrubber.com

Essential Information About O-rings

This section provides or recaps basic yet crucial aspects of rubber O-rings.

O-rings Markings

There are various ways to mark O-rings. At POWER Rubber, we use a straightforward system:

How are O-rings marked?

Inner Diameter x Thickness (whether it's the cross-section or the height).

Example of O-ring Marking at POWER Rubber

For an O-ring with an inner diameter of 5 and a height of 2, the marking would be 5x2.

You can buy rubber O-rings directly from the manufacturer.

O-ring Dimensioning

For detailed information on the dimensioning and marking of O-rings, refer to our dedicated technical article:

How to Dimension O-rings

Other Key Information

Another crucial factor to consider is the rubber compounds used in O-rings.

Types of Rubber O-rings – Materials and Compounds

Here are your options:

1. Refer to our article for comprehensive details on various rubber compounds for basic technical seals. Link to the technical article: Rubber O-rings – Everything You Need to Know
2. Review the following brief overviews of the basic rubber compounds:

The NBR O-ring is made from synthetic acrylonitrile-butadiene rubber, commonly used in contact with hydraulic oils.

Temperature range: -20°C to +90°C

Example: Seals for oil containers.

Note that NBR O-rings are not recommended for the inside of motors. For such applications, consider using Viton® O-rings.

Fluorine Blend O-rings have superior chemical resistance and higher temperature ranges than NBR, recommended for contact with mineral oils.

Temperature range: -14°C to +250°C

Example: Seals inside motors.

HNBR O-rings are made of hydrated acrylonitrile-butadiene rubber, offering higher abrasion resistance than NBR.

Temperature range: -21°C to +150°C

Example: Used in applications involving frequent disassembly with oil contact.

EPDM O-rings are made from ethylene-propylene-diene rubber, ideal for weather conditions, water contact, and applications exposed to solar radiation.

Temperature range: -41°C to +125°C

Neoprene O-rings combine features of EPDM and NBR, offering resistance to UV radiation and oils.

Temperature range: -40°C to +100°C

Silicone O-rings, marked as VMQ (temperature range: -55°C to +225°C) and FVMQ (temperature range: -20°C to +300°C), are FDA certified for food contact.

Example: Food line seals.

FFKM O-rings, made from Kalrez®, offer high chemical resistance and wide temperature range, marked as 0040, 0090, and others.

Temperature range: -42°C to +325°C

PTFE O-rings, made from Teflon®, are resistant to heat, cold, and corrosive chemicals, certified for food contact.

Temperature range: -200°C to +260°C

These O-rings are coated with a Teflon layer to enhance chemical resistance.

Temperature range: -60°C to +260°C

Applications: Pipeline systems, low friction seals, chemical resistance, rotary motion.

Hardness of Rubber O-rings

O-ring hardness is often overlooked but is crucial for their function. Hardness is measured on the Shore A scale.

Example of Hardness Measurement

An O-ring marked as 70 Shore A (70 ShA) is of standard hardness. Softer O-rings are under 70 ShA, while harder ones are above.

For more details on black nbr tc rubber hydraulic oil seals, contact us.

Impact of O-ring Hardness

Hardness affects pressure resistance. Higher pressure requires higher hardness.

Colored O-rings

Colored O-rings add transparency in part selection and offer aesthetic value. Colors can also differentiate rubber compounds.

Examples of Standard O-ring Colors and Their Meanings

Black O-rings

Black indicates NBR, Viton®, or EPDM compounds.

Brown O-rings

Usually made of Viton®, FPM, or FKM.

Red O-rings

Commonly made from silicone (VMQ).

Green O-rings

Usually EPDM or HNBR, used in air conditioning.

White O-rings

Made from silicone, available in transparent or milk white.

Blue O-rings

Rare but available.

Yellow and Silver O-rings

Less common but can be custom-made.

Need more help understanding the difference between green and black O-rings?

1. Refer to this article.
2. Contact POWER Rubber specialists at power@powerrubber.com or +48 505 16 03 03.

The colors of O-rings are optional based on customer needs, with multiple types of rubber available: NBR, FKM, FPM, EPDM, HNBR, Silicone, FFKM, and FEP O-rings.

Applications of O-rings

O-rings are extensively used in various applications thanks to our extensive experience and customer feedback.

O-rings in Computer Keyboards

O-rings are found under the keys of many keyboards to reduce noise. Follow these steps to install them:

1. Remove the key.
2. Install the O-ring on the underside of the key.
3. Place the key back.
4. Repeat for all keys.

O-rings reduce key noise, enhancing comfort.

O-rings in Vehicles

O-rings are present in engines, injectors, turbo hoses, thermostats, and various other vehicle components.

O-rings in Faucets

Leaky faucets often result from damaged O-rings. Follow this plan to fix them:

1. Turn off the water valves.
2. Disassemble the faucet.
3. Replace the O-rings.
4. Reassemble and test for leaks.

If the leak persists, the valve may be faulty and require replacement.

For O-rings, visit our online shop. We ensure quick delivery, offering a wide range of metric and inch O-rings.

Where to buy rubber O-rings? POWER Rubber

O-rings Shop in Pruszków, Near Warsaw

We have a store in Pruszków, near Warsaw, with a wide range of rubber products like O-rings.

Best regards,

Team POWERRubber.com

The company is the world’s best black tc rubber oil seal price supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.