Pfeiffer Duo

Models in this family

1. 

   DUO 20 M Vacuum

   The Pfeiffer DUO 20 M Vacuum is a dual-stage rotary vane vacuum pump for rough and medium vacuum applications. The Pfeiffer DUO 20 M Vacuum uses a magnetic coupling and an integrated gas ballast and HV safety valve.

   Cited variants

   Designation	Generation	Vintage	Changes	Source
   DUO 20 MC	—	—	C version with operating fluid F4, encapsulated magnetic coupling on the pump side, changed vane material, and hose connection on the gas ballast valve.	avac.com[1]

2. 

   Duo 35 M Vacuum

   The Pfeiffer Duo 35 M is a vacuum pump with a pumping speed for N2 of 36.0 m3/h and a maximum speed of 1800 rpm.

Sources