O-ring, 16 x 1.5 mm – Viton, Part# 320473 – vacstellar

This O-ring is made from Viton. Viton is a special rubber that handles heat very well. It also resists oils and chemicals much better than standard rubber . This makes it perfect for the tough conditions inside a vacuum pump .

This particular O-ring works with pumps from two major brands. It fits Alcatel-Adixen dry pumps like the ACP15 model . It also fits Pfeiffer pumps like the DUO1.6, DUO3, and UNO6 . It even works with larger Pfeiffer models like the DUO6, DUO6M, DUO11, DUO11M, and DUO11MC .

If you are already opening up your pump for service, replacing this O-ring is a smart move. A worn or incorrect O-ring can cause leaks. That can hurt your pump’s performance. This part fits perfectly and seals tightly .