Assembling The Pump Head - vacuubrand BVC control Instruction Manual

Assembling the pump head

page 63 of 76
➨ Position any washers that are present be-
tween diaphragm support disc and connec-
tion rod.
➨ Screw diaphragm clamping disc, diaphragm,
diaphragm support disc, and washers to con-
necting rod.
➨ Bring the diaphragm into a position in which
it is in contact with the housing and centered
with respect to the bore so that it will become
clamped uniformly between housing and
head cover.
➨ Lay down the BVC on the side of the pump,
e. g., at the edge of a workbench; support if
necessary.
➨ Assemble head cover and valves.
+ Pay attention to the correct position of the
guidance pin in the head cover (circle in fig-
ure)!
+ Pay attention to correct orientation of the
valves (see figure):
Inlet side of pump head (black valve): The
valve tongue points at the kidney-shaped or-
ifice in the valve seat.
Outlet side of pump head (white valve): The
valve is oriented the opposite direction as
the valve at the inlet side. Round orifice un-
der the valve tongue.