Are silicone O-rings flexible?
Silicone o-rings (VMQ) offer wide temperature ranges and low temperature flexibility. Silicone is renowned for its retention of flexibility and low compression set characteristics. Silicone also has one of the widest working temperature ranges for elastomers.
Are silicone O-rings better than rubber O-rings?
In conclusion, silicone ‘O’ rings can be applied to high-temperature applications or where damage from the elements may otherwise be an issue. In such cases, there are several other rubber ‘O’ ring materials that offer a more well-rounded package of benefits, including thermal stability and chemical resistance.
What are the strongest O-rings?
Polyurethane O-rings Polyurethane is well regarded for its all-round general toughness, as well as for its notable abrasion and extrusion resistance. O-rings made from this material would not be suitable for applications requiring good compression and heat resistance.
Is Viton better than rubber?
Viton is a synthetic rubber and fluoropolymer elastomer that is used in O-rings and other molded or extruded products. It offers the best fluid resistance of any commercial rubber. At high temperatures, Viton retains good mechanical properties compared to other elastomers.
How tight should o rings be?
To provide an effective seal, the O-ring’s inside diameter (I.D.) must be smaller than the piston groove diameter, so that the O-ring is slightly stretched, fitting snugly in the groove. This stretch should be between 1\%-5\% with 2\% as the ideal in most applications. A stretch greater than 5\% is not recommended.
Is Viton soft?
Soft Viton O-Rings are made of FDA materials and require less force to make an effective seal and conform better to uneven surfaces. Excellent resistance to a broad range of chemicals, oils, water, and high temperatures….Soft FDA Viton O-Rings.
| DUROMETER | 60A |
| HARDNESS | Soft |
| CROSS SECTION | 0.139″ |
| ID” | 0.359″ |
| OD” | 0.637″ |
Which is better Viton or silicone?
Silicones are very stable at low and high temperatures. Viton provides excellent resistance to compression set at high temperatures which accounts for its ability to maintain sealing force and remain tough and elastic even after long exposure to 392 degree F.
What O-ring material is best for high pressure?
O-Ring Durometer High-durometer o-rings are better suited for higher pressures and are more resistant to extrusion. Hard material yields higher pressure required to force the o-ring into extruding. The only drawback to a high durometer is the decreased squeeze of the o-ring.
What is the most durable O-ring material?
Fluorocarbon (Viton®) Offering outstanding chemical and high-temperature resistance, fluorocarbon O-rings are among the most durable and versatile available. They are particularly valuable in aircraft engines and automotive fuel handling systems because they resist swell in high-octane and oxygenated fuels.
Are nitrile O rings good?
Also called NBR or Buna-N, nitrile o rings are probably the most economical and widely used elastomer out there. This material has a desirable set of properties including low compression set, high resistance to abrasion and good tensile strength.
Are nitrile O rings better?
Versatile and reliable, nitrile offers good resistance to gasoline, diesel fuel, motor oil, acids and non-polar solvents. For this reason, it is widely used for general-purpose nitrile ‘O’ rings in automotive, marine and aerospace applications.
Should O-rings be lubricated?
Lubricating an O-ring is an important part of the assembly line process as it can help protect an application from abrasion or scuffing damage. The addition of a lubricant can extend the operating life of the O-ring by creating a barrier film over its surface.
What is the best material for an O-ring?
Depending on the service conditions, one of these materials for o-ring might be suitable: EPDM, nitrile rubber, EPDM, silicone, fluorocarbon, or fluorosilicone. Some of them work well at elevated temperature, some at cryogenic conditions, some are resistance against ozone cracking, and some resistance against chemical substances and oxidation.
What is O-ring material quick reference?
O-Ring Material Quick Reference Guide – Rubber Sealing Materials. O-ring material family chemical compatibility, temperature resistance, and other properties all factor in to o-ring material selection for an application. This popular o-ring material family comparison shows basic rubber material family properties and performance plastic properties.
What are the characteristics of an O ring?
O-Ring Characteristics. By default, most O-rings are shaped like a doughnut and are made using different materials. However there are Lobe style o-rings and rectangular cross sectional o-rings which each have there advantages in specific o-ring type applications.
What is the O-ring material family family comparison?
This popular o-ring material family comparison shows basic rubber material family properties and performance plastic properties. The guide includes generalized recommended o-ring mateiral uses and non-recommended uses with typical material mechanical properties.