Spring, Vane, DUO 250A/255M, Pfeiffer, Part# 490075 – vacstellar

Description

This spring fits several larger Pfeiffer pump models. It is used in the DUO 250A, DUO 255M (Index C), and UNO 250A pumps . This is a vane spring designed for Pfeiffer DUO 250A, DUO 255M, and UNO 250A vacuum pumps. It provides the necessary tension to keep the vanes pressed against the cylinder wall, which is essential for creating and maintaining a strong vacuum  Using a part like this one ensures the tension is correct and the fit is right.