$41.58
This spring (Part #490076) is a replacement part made for Pfeiffer DUO 255M (Index C) and DUO 250A vacuum pumps . Every spring has a simple but important job. It stores and releases mechanical energy inside your pump . Without the right spring, other parts cannot move the way they should. If you are rebuilding your pump or fixing a performance issue, this is the correct spring .
Spring, DUO 255m, Pfeiffer, DUO, Part# 490076
Spring, DUO 255m, Pfeiffer, DUO, Part# 490076
This spring is designed to store and release mechanical energy . That sounds technical, but here is what it really means.
Think of it like this. When the pump is running, certain parts need to stay in contact with each other to create a seal. The spring pushes those parts together. It provides the right amount of force to keep things tight. Not too much. Not too little. Just right.
This spring is a different part from the vane spring (Part #490075), which is specifically for pushing the vanes outward . Part #490076 serves its own unique purpose in the pump’s assembly.
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