Which option correctly lists shelf lives in increasing order for V-ring, O-ring, and Viton O-ring?

Which option correctly lists shelf lives in increasing order for V-ring, O-ring, and Viton O-ring?

• A. V-ring, O-ring, Viton O-ring
• B. O-ring, V-ring, Viton O-ring
• C. Viton O-ring, O-ring, V-ring
• D. O-ring, Viton O-ring, V-ring

Answer: (A)

Shelf life of elastomer seals depends on how well the material resists aging agents like heat, oxidation, ozone, and chemicals. Fluorocarbon elastomers (Viton) have superior stability, so Viton O-rings stay usable the longest. Standard O-rings (often nitrile or similar common elastomers) have moderate aging resistance, giving a medium shelf life. V-rings are typically made from materials with lower aging resistance in common storage conditions, so they tend to have the shortest shelf life. With those relative endurance characteristics, the order from shortest to longest shelf life is V-ring, O-ring, Viton O-ring.

Shelf life of elastomer seals depends on how well the material resists aging agents like heat, oxidation, ozone, and chemicals. Fluorocarbon elastomers (Viton) have superior stability, so Viton O-rings stay usable the longest. Standard O-rings (often nitrile or similar common elastomers) have moderate aging resistance, giving a medium shelf life. V-rings are typically made from materials with lower aging resistance in common storage conditions, so they tend to have the shortest shelf life. With those relative endurance characteristics, the order from shortest to longest shelf life is V-ring, O-ring, Viton O-ring.