Silicone (VMQ) O-Rings

 Silicone (VMQ) O-Rings  Duro 70 :

The term silicone covers a large group of materials in which vinyl-methyl-silicone (VMQ) is often the central ingredient. Silicone elastomers as a group have relatively low tensile strength, poor tear and wear resistance. However, they have many useful properties as well. Silicone has a good heat resistance, good cold flexibility, and good ozone and weather resistance as well as good insulating and physiologically neutral properties.

Operating temperature:

  • Heat resistance-Up to approximately 400°F (204°C)
  • Cold flexibility-Down to approximately –75°F (–59°C)

Chemical Resistance:

  • Engine and transmission oil (e.g.: ASTM oil No.1)
  • Animal and vegetable oil and grease
  • Brake fluid (non-petroleum base)
  • Fire-resistant hydraulic fluid, HFD-R and HFD-S
  • High molecular weight chlorinated aromatic hydrocarbons (including flame-resistant insulators, and coolant for transformers)
  • Beer, Coffee, Whiskey and Milk
  • Moderate water resistance
  • Diluted salt solutions
  • Sea Water
  • Ozone, aging and weather resistant.