Pressure Spring, Pfeiffer, DUO, UNO, DUO2.5, DUO2.5C, Part# 490041 – vacstellar

Description

This spring fits many popular Pfeiffer pump models. It works with the DUO 1.6, DUO 2.5, DUO 2.5C, DUO 3, and UNO 6 pumps . It also fits larger models like the DUO 6, DUO 6M, DUO 11, DUO 11M, and DUO 11MC .

You will often find this spring included in major overhaul kits. For example, it comes in the PMK010M overhaul kit for the DUO 6M pump . That means it is a standard part that gets replaced during a full pump rebuild.