O-ring Materials  /  Gamma Sterilization, ETO Sterilization, & Autoclaving Test  /  Mechanical Properties of O-rings

O-ring Materials:

oringsSmart Products offers 7 o-ring materials for our valves.  Below is a basic overview of each. 

Buna-N

Ethylene-Propylene

Viton®

Silicone

Fluorosilicone

Aflas

Kalrez®

 

For optimal valve performance, it is important to discuss all liquids/gasses coming into contact with the valves, as well as environmental conditions with a Product & Application Specialist.  Once we select a plastic, o-rings, and pressure requirements, we can create test samples based on specific project criteria. 

Need Gamma Sterilization, ETO Sterilization, or Autoclaving?  Smart Products has tested our o-rings to 39.9 kGy; click here to view results.

To compare mechanical properties of all o-rings, click here.

For questions, call (800) 338-0404 or email sales@smartproducts.com.

 

Buna-N

Overview:
Economical and versatile for use in a variety of application environments, Buna-N (Nitrile) is one of our most popular o-ring choices. 

Durometer (Hardness of O-ring) Availability: 
50-70

Temperature Range:

-35°F to 250°F


Works Well With:

  • Silicone Greases/Oils
  • Water
  • Petroleum Oils/Fuels
  • Ethylene Glycol Fluids

Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 200 NPT Valves
Series 300 Modular Valves
Series 500 Miniature Modular Valves
Click each series page to view if this material is available in a specific valve model.


Mechanical Properties:
Buna-N has a “good” rating for wear resistance, compression set resistance, short-term resilience, and permeation resistance.  To compare mechanical properties of all o-rings, view the chart below.

Note:

Great for gamma sterilization, ETO sterilization, and/or autoclaving.
Back to Top

 

Ethylene-Propylene

Overview: 
Another popular choice for o-rings, EPDM has the added bonus of being Class VI compatible, upon request.
 
Durometer (Hardness of O-ring) Availability: 
50-70 (with 70 being the standard size)


Temperature Range:

-60°F to 250°F

Works Well With:

  • Sunlight/Ozone/Weathering
  • Hot Water and Steam
  • Auto/Aircraft Brake Fluids
  • Keytones and Alcohols
  • Certain Acids and Bases
  • Plumbing

 
Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 200 NPT Valves
Series 300 Modular Valves
Series 500 Miniature Modular Valves
Click each series page to view if this material is available in a specific valve model.


Mechanical Properties:

EPDM has a “good” rating for resistance and a “moderate” rating for short-term resilience. To compare mechanical properties of all o-rings, view the chart below.

Note:
The compounds of EPDM o-rings at Class VI compatibility require that we use a higher durometer such as 60 or 70.  Customers also have the option of peroxide or sulfur cured EPDM o-rings, depending on a particular application’s needs.  However, if you are dealing with ozone, we always recommend peroxide cured to ensure the o-ring does not corrode.
Back to Top


Viton®

Overview: 
Compatibility with petroleum and fuel oils make Viton® (Flurocarbon Type A) a popular choice within the Automotive and Aerospace industries.  This o-ring material also works extremely well with most acids and chemicals, as well as in extremely cold or hot environments.
 
Durometer (Hardness of O-ring) Availability: 
60-75 (with 75 being the standard size)


Temperature Range:

-15°F to 400°F


Works Well With:

  • Most Acids and Chemicals
  • Petroleum Oils/Fuels
  • Silicone Oils/Greases
  • Vacuum
  • Halogenated Hydrocarbons
  • Di-Ester Lubricants

 
Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 200 NPT Valves
Series 300 Modular Valves
Series 500 Miniature Modular Valves
Click each series page to view if this material is available in a specific valve model.

 

Mechanical Properties: 
Viton® has a “good” rating for wear, an “excellent” rating for both compression set and permeation resistance, and a “moderate” rating for short-term resilience. To compare mechanical properties of all o-rings, view the chart below.
Back to Top

 

Silicone

Overview:
With an excellent rating for sealing (versus other o-rings), Silicone works well with all eight plastic body materials offered by Smart Products.  This particular o-ring material seals best because its compounds are very soft and will seat better with poppets and/or external bodies versus a harder material like Viton®.  Silicone rubber also stays flexible over a wide temperature range, and its softness gives it better conformability than other rubbers. These o-rings are also odorless and non-toxic.

Another bonus for our Silicone o-rings is that they are FDA Approved, which makes them a popular choice for certain applications within the medical or food and beverage industries. We can also offer Silicone with a Class VI status, upon request. 


Durometer (Hardness of O-ring) Availability: 
50-70 (with 70 being the standard size)


Temperature Range:

-65°F to 450°F


Works Well With:

  • Dry Heat
  • Sunlight
  • Ozone
  • Weathering


 Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 200 NPT Valves
Series 300 Modular Valves
Series 500 Miniature Modular Valves
Click each series page to view if this material is available in a specific valve model.


Mechanical Properties:
 
Silicone has an “excellent” rating for both compression set and permeation resistance, and a “poor” rating for wear and short-term resilience.  To compare mechanical properties of all o-rings, view the chart below.

Note:
Great for gamma sterilization, ETO sterilization, and/or autoclaving.
Back to Top

 

Fluorosilicone

Overview:
With the widest temperature range (-80°F to 450°F) available of any o-ring we offer, Fluorosilicone is especially popular for really cold environments.  Another bonus is its great resistance to chemicals.
 
Durometer (Hardness of O-ring) Availability: 
70 (however, we do offer some valve models in a 60 durometer option)

Temperature Range:

-80°F to 450°F

Works Well With:

  • Jet Fuel
  • Dry Heat
  • Some Petroleum Oils
  • Chlorinated Solvents
  • Aromatic Mineral Oils
  • Automotive Refrigerants
  • Dilute Acids
  • Dilute Alkalis
  • Hydrocarbon Fuels
  • Silicone Fluids

These characteristics make Fluorosilicone especially popular for use within the Military or Aerospace markets.

Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 200 NPT Valves
Series 300 Modular Valves
Click each series page to view if this material is available in a specific valve model.


Mechanical Properties:
 
Fluorosilicone has a “moderate” rating for both compression set and short-term resilience, and a “poor” rating for wear and permeation resistance.  To compare mechanical properties of all o-rings, view the chart below.

Note:

Great for gamma sterilization, ETO sterilization, and/or autoclaving.
Back to Top

 

Aflas

Overview:
Only available in a durometer (hardness of the o-ring) size of 80, Aflas® is one strong o-ring.  Ideal for tougher environments, particularly in the automotive industry, this o-ring is used in a lot of engine applications due to its high temperature resistance and excellent resistance against motor oils and coolants.  This material has the ability to work really well with a variety of media, similar to EPDM and Viton® o-rings. 

Durometer (Hardness of O-ring) Availability: 
80

Temperature Range:

-20°F to +400°F

Works Well With:

  • Steam
  • Amines
  • Petroleum Fluids
  • Brake Fluids
  • Phosphate Esters


Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 300 Modular Valves
Click each series page to view if this material is available in a specific valve model.


Mechanical Properties:
 
Excellent resistance to petroleum products, steam, phosphate esters, amines and brake fluids.  To compare mechanical properties of all o-rings, view the chart below.

Note:
We are not able to offer Alfas® with a spring lower than 0.5 PSI. 
Back to Top


Kalrez®

Overview:
Working with really high temperatures and extremely caustic substances makes Kalrez® o-rings an option when no other o-ring will do the job.  Kalrez®, known to be expensive throughout the marketplace, is an o-ring material that is still worth consideration if your application requires the use of harsh chemicals.  Because Kalrez® works so well in extreme environments, cost can be justified with savings in other areas such as ensuring a device will run smoothly and efficiently because the o-ring seal is capable of resisting particularly rigid substances.  

Durometer (Hardness of O-ring) Availability: 
80 or 90

Temperature Range:

-10°F to 615°F

Works Well With:

  • Low Out Gassing
  • Chlorine Wet/Dry
  • Petroleum Oil
  • Chlorinated Hydrocarbons


Available in:
Series 100 Cartridge Valves
Series 100 Specialty Valves
Series 300 Modular Valves

Mechanical Properties:
 
Kalrez® has a “good” rating for wear, compression set, and permeation resistance.  It is rated “moderate” for short-term resilience. To compare mechanical properties of all o-rings, view the chart below.


Note:

We are not able to offer Kalrez® with a spring lower than 0.5 PSI. 
Back to Top


Gamma Sterilization, ETO Sterilization, & Autoclaving Test

Gamma Radiation Effects

Grading Scale
A = No Visual or Functional Effects
B = Only Visual Effects
C = Only Minor Functional Effects
D = Visual & Minor Functional Effects
F = Major Functional Effects

 

Mechanical Properties

Oring Mechanical Properties

 

For questions, call a Product & Application Specialist at (800) 338-0404 or email sales@smartproducts.com

 

Back to Top

Note: Our products are subject to continuous improvement. To achieve this goal, Smart Products reserves the right to change features, processes, materials, testing and other specifications as necessary. All plastic body material recommendations are based on standard corrosion resistant and compatibility guides. Smart Products strongly recommends that customers test products for each application-specific use.

Buyer is urged to test and investigate the compatibility of any substance used with our products prior to actual use. Seller will not be responsible for the failure of Buyer to thoroughly test and investigate the compatibility of the substances used with our products and the fitness of the products for its particular use or application.

VALVES

Series 100 Cartridge

Series 100 Specialty
Series 200 NPT
Series 300 Modular
Series 500 Miniature

JACO SMART FITTINGS
PUMPS

Liquid Pumps
Air Pumps
Micro Pressure Pumps
Liquid Pumps Specs PDF
Air Pumps Specs PDF
TECHNICAL

FAQs
Check Valve Operation
Plastics Guide
O-rings Guide
Conversion Charts PDF
Application Examples

MARKETS

Automotive
Chemical Processing
Food & Beverage
Industrial
Medical
Pool & Spa
Water Treatment

Others
NEWS

Newsletters
Videos
Tradeshows
Charitable Contributions


CATALOG PDF
ABOUT

Contact Us
Terms & Conditions




Smart Products, Inc. · Call Toll Free – (800) 338-0404
675 Jarvis Drive · Morgan Hill, CA 95037 & 644 Fanning Fields Rd · Mills River, NC 28759 USA