This 54 mm long spring (Part #490077) is a replacement part made for two popular Pfeiffer vacuum pumps: the DUO 250A and the DUO 255M (Index C) . Inside your pump, this spring stores and releases mechanical energy. That is a fancy way of saying it pushes and pulls other parts so everything works the way it should. If you are rebuilding your pump or fixing a performance issue, this is the correct spring
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 .
10 in stock
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