O-ring, 4.2 x 1.9 mm – Viton, Part# 23970224 – vacstellar

This little O-ring plays a big role in your vacuum pump. It is made from Viton, a strong rubber that handles heat and chemicals without breaking down. The size is 4.2 mm inside and 1.9 mm thick, so it fits snugly where it needs to go.

Viton is special because it stays flexible in hot or cold conditions. It can handle temperatures from about -26°C up to 230°C. That means it lasts longer, even if your pump runs hard every day. It also resists oils and many chemicals, so it does not swell or crack easily.

People who work in labs or factories like this part because it is simple to replace and keeps everything sealed tight. If one of your Trivac pumps needs a fresh seal, this O-ring is a smart, dependable choice. It is small, but it makes a real difference in how well your equipment performs.