Labconco VACUUBRAND Diaphragm Pump 7393000 - Manual (Page 61)

page 61 of 74
➨
Remove valve heads (O) along with the disc
springs (R), connection tube if applicable,
hose nozzles (P) and connection fasteners
(Q) or move the valve heads carefully aside.
Note position and orientation of the valve
heads.
+
Note position and alignment of valves (N).
➨
Check valves (N) and O-rings (M) for damage and soiling.
➨
Replace valves or O-rings if necessary.
➨
Use petroleum ether or other industrial solvent to remove deposits. Do
not inhale vapors.
➨
Insert O-rings (M) and valves (N). See figure
for the correct position of the valves:
+
Inlet side (IN):
Marked ”IN” next to the valve seat. The valve
tongue points at the kidney-shaped orifice in
the valve seat.
+
Outlet side (EX):
Marked with ”EX” next to the valve seat. The
valve is oriented the same direction as the
valve at the inlet side.
EX
IN
➨
Position valve heads (O), with hose nozzle
(P), if applicable, connection tube or connec-
tion fastener (Q), and disc springs (R) on the
valve seats. Position disc springs with large
opening downwards. Pay attention to the
correct orientation of the valve heads.
+
Center the valve head with respect to the
valve seat. The valve head must lie flat on
the valve seat.
M
N
O
R
O
R
N
Q