VMQ O-Rings

VMQ O-Rings provide an excellent resistance to aging, oxygen, ozone, UV rays as well as a wide temperature range including a high flexibility into cold environment. VMQ is also a good electrical insulator and is highly gas permeable.

Because of their low mechanical properties, VMQ O-Rings are mainly used in static applications. In other words, their low tear resistance and high friction coefficient make them difficult to use in dynamic sealing applications.

VMQ-made O-Rings (Silicone rubber / Polysiloxane of Vynile-Methyle) are usually red-colored.

VMQ O-rings have a good resistance to:

• Engine oil and transmission oil
• Animal and vegetable oils and greases
• Brake fluid
• Hydraulic fluid resistant to fire
• Chlorinated aromatic hydrocarbons of high molecular weight (including flame retardant insulators and transformer refrigerant)
• Diluted saline solutions
• Ozone, ageing and weather
• And they provide a moderate resistance to water as well

On the other hand, VMQ is not compliant with:

• Silicone oils and greases
• Aromatic mineral oils
• Hot water and steam that overpasses 121 °C
• Acids and alcalyse
• Chlorinated hydrocarbons of low molecular weight (such as trichloroethylene)
• Fuelsbased on hydrocarbons
• Aromatic hydrocarbons (benzene, toluene)

The term silicone includes a large number of materials including VMQ (Vynil-Methyl-Silicone). Silicone elastomers have many remarkable properties among which a good resistance to heat and a high flexibility into cold environment. The also have a good resistance to ozone and ageing as well as excellent insulation properties.

Go to Brochures to download complete information about our O-Rings..