BUCHI DuMaster D-480 - Manual (Page 200)

Operation Manual D-480 ©BÜCH Labortechnik AG
8 - Maintaining the instrument 200
Phase 4: Dismantling the ball valve
Please observe the following instruction:
Caution Cutting sealing elements apart/out (o-rings, quad rings, half shells, ferrules).
When cutting sealing elements apart/out with a knife you may damage sealing
surfaces.
Never remove sealing elements with a knife but rather with tweezers.
Proceed as follows:
 Unscrew and remove the wheel flange of the half shells using the hook wrench.
 Unscrew the screws of the holder plate and remove the holder plate.
 Remove the drive bearing.