Disc, Coupling, DUO 120A, Pfeiffer DUO, Part# 540005

This is a disc coupling. Its part number is 540005. A disc coupling is a mechanical device. It connects two shafts together. In your pump, it connects the motor shaft to the pump shaft .

Think of it like a flexible connector. It transfers the spinning force from the motor to the pump. But it also allows for small amounts of movement between the two shafts .

This disc coupling is made specifically for one pump model:

• Pfeiffer DUO 120A 

If you own this pump and are servicing the drive assembly, you may need this coupling. It is also included as a standard component in the Major Overhaul Kit (Part # PMK024) for the DUO 120A .This disc coupling (Part #540005) is a standard component in the Major Overhaul Kit (Part # PMK024) for the DUO 120A . This kit contains all the essential parts for a complete rebuild. If you are buying a full overhaul kit, you will find this coupling inside.