Spring, 40 mm Long, DUO 125, Pfeiffer, DUO, Part# 490074

This spring’s main job is to provide tension inside the pump. Think of it like this. When the pump is running, certain parts need to stay in contact with each other. The spring pushes those parts together. It makes sure everything stays tight and works the way it should .

Without the right spring, parts can lose contact. Then your pump cannot create good vacuum pressure. It might make strange noises. Or it might stop working altogether.

• Made for DUO 125: This spring is specifically designed for the Pfeiffer DUO 125 pump . No guessing if it will fit. It will.

• Right length for the job: This spring is exactly 40 mm long . That is the correct size for this pump model. Not too short. Not too long. Just right.

• Genuine quality: This is a real replacement part from. It is made to work like the original spring . Cheap springs from unknown brands can be the wrong length, the wrong strength, or made of weak metal.

• Durable construction: Vacuum pumps are tough environments. They have heat. They have oil. They have constant movement. This spring is built to handle all of that without losing its strength or breaking .

• Restores pump performance: If your DUO 125 is not working as well as it used to, a weak or broken spring could be the reason. Replacing it with the right part can make a big difference 

  This 40 mm spring is made for this specific Pfeiffer pump model:

  • DUO 125 

  Check your pump’s model tag before ordering. Look for “DUO 125” on the label.