Heidolph ROTAVAC Vario pumping unit - Manual (Page 55)

page 55 of 61
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
It is absolutely essential to comply with the positions and orientations of the
head covers and valves!
Scheme of pump head with head covers and valves
”side with hose
connection”
”motor side”
valves at the inlet
(kidney-shaped
opening beside
valve)
valves at the outlet
(round centred
opening under
valve)
➨ Position housing cover.
☞ Move housing cover slightly to make sure that the head
covers are correctly positioned.
➨ Screw in the six socket head screws fixing the housing
cover crosswise first slightly, then tighten.
☞ Do not tighten until head cover is in contact with housing,
max. torque 6 Nm.
Replace diaphragms and valves similarly on the other side of the pump (only
ROTAVAC vario control).
➨ Use open ended wrench (w/f 14) to reconnect hose to el-
bow fitting.