This spring (Part #3838132SV) is a replacement part used across a wide range of Pfeiffer UNO and DUO series vacuum pumps. It is a critical component found in valve and flap mechanisms, including models like UNO1.5A, DUO1.5A, UNO35, DUO35, DUO65, DUO11, and DUO6 . If you are rebuilding your pump or restoring its performance, this spring is an essential part of the job. It is also known by the cross-reference number B0042 .
This Vane Spring (Part #3836534) is a replacement part made specifically for Pfeiffer UNO 1.5A and DUO 1.5A vacuum pumps . Its job is to provide the necessary tension and support for the vanes inside your pump . This allows the vanes to move freely while maintaining proper contact with the pump’s rotor . If you are rebuilding your pump, you will need four of these springs for a complete repair
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