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EPDM O-ring specifications tell us what makes an O-ring work well and safely. These rules help engineers pick the best material for tough jobs. EPDM O-rings are used where there is heat, chemicals, or outdoor weather.
Nuclear grade EPDM is very important in nuclear work. It works very well in hard places. It keeps things safe and working, even though it costs more and has some limits.
EPDM O-rings have special features like handling high and low temperatures and lasting a long time. This makes them needed in many jobs.
| Specification | Details |
|---|---|
| Temperature Resistance | Works from -65°F to 300°F (-54°C to 150°C). Some types work in even hotter or colder places. |
| Chemical Resistance | Stands up to water, steam, alkalis, and mild acids. It does not work with petroleum oils. |
| Weather and UV Resistance | Handles ozone, sunlight, and bad weather very well. It is great for use outside. |
| Low-Temperature Flexibility | Stays bendy at -60°F (-51°C). It is better than many other elastomers. |
| Electrical Insulation | Good for electrical jobs because it does not let electricity pass through. |
| Durability | Has strong pull strength (7-21 MPa) and does not tear easily. It lasts a long time. |
Knowing EPDM O-ring specifications helps people keep machines safe and working in important places.
EPDM O-rings last a long time and can handle heat. They also resist chemicals and bad weather. This makes them good for many uses.
Knowing EPDM specifications helps engineers pick the right O-ring. This keeps things safe and working well.
EPDM O-rings are safe for food and medical use. They meet tough rules like FDA and NSF.
Picking the right hardness and temperature for O-rings stops leaks. It also helps O-rings last longer.
Always check if O-rings work with fluids and the environment. This helps stop O-rings from failing too soon.
EPDM means ethylene propylene diene monomer. It is a kind of man-made rubber. People make EPDM by mixing three parts: ethylene, propylene, and a diene. The diene helps the rubber form strong bonds when it is heated. These bonds make EPDM both strong and bendy. EPM is different because it does not have the diene. This makes EPDM better for sealing things.
The diene lets the rubber get stronger.
EPM does not use a diene, so it is not the same.
EPDM O-rings have traits that help them work in many places. The table below lists some main physical and chemical traits:
| Property Type | Description |
|---|---|
| Chemical Resistance | Stays strong against acids, bases, steam, and many chemicals. Does not work well with mineral oils and fuels. |
| Weather Resistance | Protects from UV rays, ozone, and bad weather. |
| Temperature Range | Works from -50°C to +150°C and stays bendy. |
| Mechanical Properties | Keeps its shape under pressure, does not change in heat, and bounces back okay. |
These traits help EPDM O-rings last longer and work well in hard places. EPDM O-ring rules often look at these traits to pick the right O-ring.
Many fields use EPDM O-rings because they can handle hard jobs. The table below shows where EPDM O-rings are used most:
| Industry | Applications |
|---|---|
| Automotive | Seals for gaskets, fuel parts, and hoses |
| Aerospace | Used for chemical safety and very hot or cold places |
| Food Industry | Used in machines that make food |
| Medical Devices | Used in some medical and drug tools |
| HVAC | Used in heating, cooling, and air units |
| Water Systems | Used in boilers, steam tools, and outside water jobs |
| Chemical Processing | Used in tools for acids, alkalis, and ketones |
| Outdoor Applications | Used in things that stay outside in bad weather |
EPDM O-rings work in very hot or cold places.
They last outside in rough weather.
They are safe for food and medical tools because they are not toxic.
The size of an O-ring is very important for sealing. The AS568 standard gives a list of 394 sizes for O-rings. Each size has a number that matches exact measurements for the inner diameter (ID) and cross-sectional diameter (CS). This standard helps engineers and buyers pick O-rings that fit perfectly. O-rings from different companies can work together because they follow these rules. This makes repairs and replacements much easier.
The AS568 standard ensures that O-rings from different brands will fit the same grooves and seal the same surfaces. This helps keep machines running safely and reduces mistakes.
Key points about AS568 standard:
Lists 394 O-ring sizes.
Gives exact ID and CS measurements.
Makes O-rings from different makers interchangeable.
Helps with reliable sealing in many jobs.
Hardness tells how firm or soft an O-ring feels. The Shore A scale measures this property. EPDM O-ring specifications usually show a hardness between 40 and 90 Shore A. Most O-rings use 60–70 Shore A. Softer O-rings bend more easily. Harder O-rings resist wear but may crack if bent too much.
Hardness range: 40–90 Shore A.
Most common: 60–70 Shore A.
Softer O-rings (lower Shore A) = more flexible.
Harder O-rings (higher Shore A) = more rigid.
The right hardness depends on the job. For moving parts, a flexible O-ring works better. For parts that do not move, a harder O-ring may last longer.
| Aspect | Influence on Sealing Performance |
|---|---|
| Flexibility | Helps the O-ring fit moving parts and seal well in dynamic jobs. |
| Durability | Affects how long the O-ring lasts under stress. |
| Suitability | Shows if the O-ring fits the job, like moving or still parts. |
Temperature affects how well an O-ring works. EPDM O-ring specifications show that these O-rings can handle a wide range of heat and cold. They stay flexible in cold and do not melt in heat.
| Temperature Range | Material Property |
|---|---|
| Up to 302°F (150°C) | Heat Resistance |
| Down to -70°F (-57°C) | Cold Flexibility |
If an O-ring gets too cold, it may shrink, get brittle, or lose its bend. If it gets too hot, it may harden, swell, or change shape. These changes can make the O-ring fail.
At low temperatures, O-rings may shrink or break.
At high temperatures, O-rings may swell or lose shape.
Staying within the right temperature range helps O-rings last longer.
The lifespan of EPDM O-rings depends on the temperature and the type of fluid they touch. Extreme heat or cold can make them wear out faster.
EPDM O-ring specifications include how well the O-ring stands up to chemicals and the environment. EPDM O-rings resist many chemicals, but some can damage them. They work well with water, steam, and many cleaning products. They do not work well with oils, gasoline, or hydrocarbon fluids.
| Resistant Chemicals | Chemicals to Avoid |
|---|---|
| Polar fluids | Hydrocarbon fluids |
| Polar solvents | Oils |
| Alkaline cleaning products | Gasoline |
| Alcohols | Kerosene |
| Steam and hot water | Mineral oil-based lubricants |
| Mild and diluted acids | |
| Ammonia | |
| Detergents |
EPDM O-rings also resist damage from sunlight, ozone, and bad weather. This makes them good for outdoor use.
| Environmental Factor | Impact on EPDM O-rings |
|---|---|
| Ozone | Can cause cracks in weak spots of the rubber |
| UV Light | May lead to slow breakdown over time |
EPDM O-rings last longer in places with lots of sun or ozone.
They are a good choice for outdoor, steam, and cleaning jobs.
Choosing the right EPDM O-ring specifications helps make sure the O-ring will last and work well in its job.
Industry standards help companies make sure EPDM O-rings work well. These rules also help O-rings last longer. ASTM D2000 is a main standard for rubber materials. It sets rules for how strong, heat-resistant, and chemical-resistant the rubber must be. Many industries use ASTM D2000 to check if O-rings are good enough. This includes car, airplane, and medical companies. The standard gives a clear way to describe elastomers. This helps companies make O-rings that are always the same.
| Standard | Description |
|---|---|
| ASTM D2000 | A standard for classifying and specifying rubber materials, including EPDM O-rings, ensuring quality and performance across various industries. |
ASTM standards are used mostly in the United States. Some companies in other countries use them too. ISO standards are known all over the world. ISO covers more topics than ASTM. It includes safety and how companies are managed. Both ASTM and ISO have groups of experts who make the rules. ISO focuses more on what the whole world needs.
| Aspect | ASTM | ISO |
|---|---|---|
| Geographic Reach | Mainly U.S., growing worldwide | Global |
| Voluntary vs. Mandatory | Voluntary | Often voluntary, sometimes required |
| Scope | Material properties and testing | Broader, includes safety and management |
| Creation Process | U.S. technical committees | International expert groups |
| Application | U.S. manufacturing and compliance | International trade and compliance |
Some EPDM O-rings must follow special rules for food, water, or medical use. The FDA and NSF make these rules to keep people safe. The FDA’s CFR 21.177.2600 lists which materials can touch food. It also says what can come out of the O-ring into food. NSF’s ANSI/NSF61 makes sure O-rings are safe for drinking water. These O-rings must not smell or taste bad. They must not let germs grow. They need to work in many temperatures and not be toxic.
| Organization | Requirement | Description |
|---|---|---|
| FDA | CFR 21.177.2600 | Lists approved materials for food contact and limits extractables. |
| NSF | ANSI/NSF61 | Ensures safety for potable water, with strict testing and audits. |
Medical devices need even stricter rules. O-rings in these tools must pass hard safety and function tests. They often need FDA approval and USP Class VI certification. Makers test these O-rings for safety before using them.
Makers do many tests to check if EPDM O-rings meet the rules. They look at the size, shape, and surface for problems. Hardness and strength tests show if the O-ring will last under stress. Compression set resistance checks if the O-ring goes back to its shape after being squeezed. Leak testing shows if the seal works. Some tests pretend to age the O-ring to see how it holds up over time. For important jobs, companies give certificates to prove the O-rings meet all the rules.
| Quality Assurance Test | Description |
|---|---|
| Dimensional Accuracy | Checks size and shape |
| Surface Finish | Looks for defects |
| Durometer Hardness Measurement | Measures hardness |
| Tensile Strength and Elongation | Tests strength and flexibility |
| Compression Set Resistance | Checks if O-ring returns to shape |
| Visual Inspection | Finds visible defects |
| Leak Testing | Tests sealing ability |
| Aging Simulations | Tests durability over time |
| Analytical Certification | Proves compliance with FDA, USP, or NSF |
| Certificates of Conformity | Provides proof for critical applications |
Quality checks help companies give EPDM O-rings that meet the rules. This keeps people and equipment safe.
Engineers and buyers use a specification sheet to pick an O-ring. These sheets give important facts about the O-ring. The table below shows what you can find on an EPDM O-ring sheet:
| Specification | Details |
|---|---|
| Temperature Range | 65ºF up to 300ºF (-54ºC up to 150ºC) |
| Color | Black |
| Durometer (Hardness) | 70 ± 5 |
| Profile | Round |
| Tensile Strength | 1,450 psi |
| Elongation Change % | 250% minimum |
| Shelf Life | Unlimited |
| Compatible With | Hot water, steam, brake fluid, ketones, dilute acids, alkalis, silicone oils, alcohols, ozone, weathering |
| Not Compatible With | Mineral oil products, hydrocarbons, di-ester lubricants, halogenated solvents, petroleum oils and greases |
| Other Names | Ethylene propylene diene monomer, EPR, EPDM |
A specification sheet helps people see if the O-ring fits their needs. They can check if it works with the fluids and temperatures in their system.
Tolerances tell how much the O-ring size can change and still work. Engineers use these numbers to make sure the O-ring fits and seals well. The table below shows a normal tolerance for metric O-rings:
| Dimension | Tolerance Range |
|---|---|
| Metric O-Rings | +/- % (selectable) |
When picking an O-ring, users should choose a size that fits the job. They should also think about the gland design for better sealing.
General purpose tolerance parts are used for high performance sealing. Special jobs may need careful changes to the gland design. Tolerances help stop leaks and keep machines safe.
Different jobs use different rules for O-rings. ASTM and ISO are two main groups that make these rules. ASTM standards focus on material and testing in the United States. ISO standards are used around the world and include safety and management. Comparing these rules helps people pick the right O-ring for their area and job.
Tip: Always check which rule your project needs before you order EPDM O-ring specifications. This helps you avoid mistakes and makes sure the O-ring will work as needed.
Picking the right O-ring means checking what the job needs. Engineers look at things like heat, hardness, and how it handles chemicals. The table below shows what to think about:
| Specification | Details |
|---|---|
| Temperature Range | Most work from -65ºF to 300ºF. Some special types can go higher or lower. |
| Durometer | Goes from 40 to 90 Shore A. Most use 70 Shore A. |
| Chemical Resistance | Stands up to weather, ozone, steam, and many water-based chemicals. |
| Common Applications | Used in cars, HVAC, and water treatment jobs. |
If you match the O-ring to the job, it helps stop leaks and problems.
Tip: Always check what heat and chemicals the O-ring will face before picking one.
Not all O-rings work with every liquid. Charts help people see if EPDM O-rings will last with certain chemicals or in some places.
| Compatibility Level | Description |
|---|---|
| Resistant | No change or just a little effect |
| Limited Resistance | Some effect, but not too bad |
| Not Suitable | Big effect or damage will happen |
These ratings are just a guide.
They might not fit every case.
For important jobs, test first or ask an expert.
If you ignore these charts, the O-ring might break fast. Always check the chart and test if you are not sure.
Mechanical stress can make an O-ring wear out faster. High pressure, shaking, or quick pressure changes can hurt EPDM O-rings. The table below lists some risks:
| Mechanical Stress Type | Description |
|---|---|
| Susceptibility to Cracking | EPDM O-rings can crack if there is high pressure or lots of movement. |
| Tearing Risk | Heavy loads can tear the O-ring and make it leak. |
| Slow Rebound Speed | EPDM bounces back slowly, so it may not work well with fast pressure changes. |
| Stress Cracking | Pulling on the O-ring for a long time can cause cracks and make it not last as long. |
Some people make mistakes by not checking the heat limit, forgetting about chemicals, or thinking one O-ring works for everything. You should also think about pressure, heavy loads, and things like sunlight or ozone.
Check every need before picking an O-ring.
Do not use the same O-ring for every job.
Think about both the place and the stress on the O-ring.
Note: Picking carefully helps stop leaks, breakdowns, and expensive fixes.
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EPDM O-rings work well outside. They do not get damaged by sunlight or ozone. Bad weather does not hurt them. Engineers use EPDM for roofs, windows, and car weather strips. The material stays bendy in cold weather. It does not crack when it gets hot. EPDM does not age fast, so it lasts longer outdoors.
| Performance Aspect | Description |
|---|---|
| Superior Weather Resistance | EPDM rubber stands up to ozone, UV rays, and bad weather. |
| Excellent Temperature Range | Works from -65°F to 300°F, so it handles very hot or cold places. |
| Outstanding Aging Characteristics | Does not break down from oxygen, so it lasts a long time. |
| Chemical Resistance | Handles many acids and bases, but does not work with petroleum products. |
EPDM does not break down from UV rays, ozone, or tough weather.
It is great for outdoor jobs like roofing and car weather seals.
Tip: EPDM O-rings help keep outdoor equipment safe all year.
Factories and car companies use EPDM O-rings in machines. EPDM stands up to steam, acids, and water. It works well in hot places like engines and exhaust pipes. EPDM resists chemicals used for cleaning. Many industries use EPDM because it is safe and does not break down fast.
EPDM O-rings work well with ozone, steam, acids, and water.
They are used in aerospace, medicine, and food jobs because they are safe and resist cleaning chemicals.
EPDM does not wear out from weather, heat, or chemicals, so it is good for car seals.
It works in very hot places and under strong UV light.
EPDM keeps its shape after being squeezed, which helps with weather strips.
EPDM is good for seals that get hot from engines and exhaust.
Note: EPDM O-rings do not work with petroleum. Engineers should not use them in fuel systems.
EPDM O-rings are important in food, water, and medical tools. The material bends easily and does not cost much. It works in both hot and cold places. EPDM resists oils and phosphate esters, which helps in many jobs. Safety rules say EPDM O-rings must meet strict standards.
| Requirement Type | Extraction Limit | Material Type |
|---|---|---|
| Liquids | Must not go over 20mg per square inch in distilled water | EPDM |
| Fatty Foods | Must not go over 175mg per square inch in n-Hexane | EPDM |
NSF gives approval for food processing materials.
3-A Sanitary Standards are needed for food contact.
Callout: EPDM O-rings must pass tests before use in food, water, or medical tools. This keeps people safe and equipment working.
Knowing about EPDM O-ring specifications and standards helps people stop leaks and keep things safe. Some main benefits are:
They do not get damaged by heat, water, steam, ozone, or UV rays.
They work well in both hot and cold places.
They can handle many chemicals, so they are used in lots of jobs, even food and medicine.
If you have special needs, you should ask an expert or a trusted seller for help. If you need more help or want to pick the right product, talking to someone who knows a lot will help you get the best results.
EPDM stands for ethylene propylene diene monomer. This material is a type of synthetic rubber. Manufacturers use it to make O-rings that resist heat, weather, and many chemicals.
No, EPDM O-rings do not work well with oil or fuel. These substances can break down the rubber. For oil or fuel systems, engineers should choose a different material.
Engineers should check for certifications like ASTM D2000, FDA, or NSF. The table below shows common standards:
| Standard | Use Case |
|---|---|
| ASTM D2000 | General industry |
| FDA | Food contact |
| NSF | Water systems |
Most EPDM O-rings work from -65°F to 300°F (-54°C to 150°C). Some special types can handle even wider ranges. Always check the product sheet for exact limits.
