BUCHI DuMaster D-480 - Manual (Page 203)

Operation Manual D-480 ©BÜCH Labortechnik AG
8 - Maintaining the instrument 203
Phase 2: Assembling the ball valve
Proceed as follows:
 Slighly grease the sealing surface of the half shells and the surface of the ball (contact surface of
the ball).
 Insert the bottom half shell (2) and observe the recess for the drive bearing. Insert the ball (3)
and observe the position of the recess for the drive bearing.
 Insert the drive bearing (6). Observe the following
 the fit of the o-ring (9)
 and that the cylinder pin snaps into the blind hole bore of the ball.
 Insert the top half shell (2) and observe the recess for the drive bearing.
 Screw the holder plate (7) onto the ball valve.
 Also grease the surface of the wheel flange facing the half shells. Insert the wheel flange into the
half shells (1) and tighten it by means of the hook wrench (to the stop).
 Turn the ball at the drive shaft twice for a better dispersion of the grease.
 Position the ball in such a way that the ball valve is open.
 Remove excessive grease with a cloth by pulling the cloth through the bore.
Step 3: Installing the ball valve
For installation of the ball valve proceed in reversed sequence as it is described for its removal.