vacuubrand MD 4C NT + 2 AK, Инструкция по эксплуатации

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page 61 of 75
Remove valve heads (O) along with the disc
springs (R), connection tube if applicable,
hose nozzles (P) and connection fasten-
ers (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.
-
ure 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
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 con-
nection fastener (Q), and disc springs (R)
on the valve seats. Position disc springs
with large opening downwards. Pay atten-
tion to the correct orientation of the valve
heads.
Center the valve head with respect to the
the valve seat.
M
N
R