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AS009-70S Silicone Oring (AS568-009 Size 0.070 CS x 0.208 ID)
Model: AS009-70S
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AS009-70S Silicone Oring (AS568-009 Size 0.070 CS  x 0.208 ID)
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AS009-70S Silicone O-Ring AS568-009

Silicone is an excellent material for o-rings in static sealing applications, due to its outstanding resistance to extreme temperatures and retention of compression and flexibility. Additionally silicone exhibits excellent resistance to ozone, oxygen, moisture and water swell. Finally, silicone is a very low odor and taste elastomer making it a prime choice for the medical, and food and beverage industries. Limiting factors of silicone are its low tear strength and poor abrasion resistance which limit silicone o-rings to static sealing applications. Silicone o-rings are sometimes referred to as VMQ o-rings.

The silicone AS009-70S o-ring can be reference in one of four ways:

  • Mostly commonly, the industry standard AS568 “dash” number: (AS568-009)
  • Standard dimensions: (CS 0.070" x ID 0.208")
  • Metric dimensions: (CS 1.78 x ID 5.28)
  • Nominal fractional dimensions: (CS 1/16 " x ID 7/32")

The final consideration for an o-ring after size and material type is the durometer. Durometer is an industry standard measurement for a material’s hardness. Most often for rubber seals, durometer is measured and listed in accordance with the “Shore A” scale. Typical durometers for standard rubber seals are 70, 75 and 90, depending on the material. A higher number indicates a harder material. Durometer is also generally stated and accepted with a “+/- 5” tolerance. For silicone o-rings, the standard nominal durometer is 70.

Primary Uses:

O-Rings, rubber seals and custom molded rubber components for:

  • static seals for extreme temperature applications
  • food applications
  • medical devices
  • FDA applications
  • Model Number: AS009-70S
  • Manufacturers Part Number: AS009-70S
  • Industry Standard Reference Number: AS568-009
  • Material Type: Silicone / VMQ
  • Durometer (ShoreA): 70
Temperatures Range (Dry Heat)
Low: High:
-75`F / -59`C 450`F / 232`C
Silicone O-Ring AS568-009 Application Ratings
Properties Excellent Good Fair Poor
Oils & Grease    
Silicone has fair resistance verse oils and grease
 
Tear Strength      
silicone exhibits poor tensile strength
Fuel Resistance      
silicone o-rings should not be used in fuel systems
Heat Ozone & Aging Resistance
silicone orings are excellent verse heat, ozone and aging
     
Water Swell Resistance
silicone exhibits excellent water swell resistance
     
Abrasion Resistance      
silicone's low abrasion resistance limits seals to static applications
Silicone O-Ring AS568-009 Dimensions CS x ID

AS568-009 (Durometer 70) cross reference sizes

  • Nominal Fraction: 1/16 x 7/32
  • Actual Size: 0.070 x 0.208
  • Metric Size Millimeters: 1.78 x 5.28
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Currently viewing: AS009-70S | AS568-009 Silicone O-ring 70 Durometer (VMQ)
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