Oil Sight Glass, Part# 583569633 – vacstellar

Description

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  This spring fits several larger Pfeiffer pump models. It is used in the DUO 250A, DUO 255M (Index C), and UNO 250A pumps . These are big, powerful pumps used in industrial settings. It is also part of the PVK025A Vane Kit for the same pump. In both kits, you get two springs—one for each vane