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Aztec 600 aluminium, ammonia, color, iron, manganese, phosphate
Single- and multi-stream colorimetric analyzers
13 Maintenance
66
IM/AZT6CR–EN Rev. R
5. Referring to Fig. 13.2:
a. Locate the waste valve
D
, identified by an orange
colored label
E
on the back of the valve.
b. Remove the 2 M3 screws
F
securing the valve to
the manifold and remove the valve. Discard the valve
face gasket
G
.
c. Using a small screwdriver, depress the retaining
clips
H
and remove the diaphragm seat
I
.
d. Turn the valve over and, taking great care not to lose
spring
J
, allow the diaphragm retainer
K
,
complete with washer
L
, diaphragm
M
and
spring
J
to fall out.
e. Remove the diaphragm
M
from the diaphragm
retainer
K
and discard.
f. Fit the new Kalrez diaphragm, ensuring washer
L
remains in place below the diaphragm.
g. Ensuring spring
J
is in place in the hole in
diaphragm retainer
K
, insert the diaphragm
retainer, complete with washer
L
and diaphragm
M
into the valve ensuring the spring remains in
position.
h. Press the diaphragm seat
I
into the valve body
until the retaining clips
H
lock into place.
i. Fit the new Kalrez valve face gasket
G
into the
recess in the diaphragm seat.
j. Refit the valve
D
to the valve manifold and secure
using the two M3 screws
F
.
k. Working in a clockwise or counter-clockwise
direction, repeat steps b to j for the remaining
valves, replacing the diaphragms and valve face
gaskets with the new EDPM diaphragms and
gaskets from the spares kit.
Note.
All valves, except the waste valve,
contain an EPDM diaphragm. The waste valve
must
be fitted with the KALREZ diaphragm.
Note.
The diaphragm seat retaining clips are
different widths to ensure that the diaphragm
seat fits in one position only.
Note.
All valves, except the waste valve, are
fitted with an EPDM valve face gasket. The
waste valve
must
be fitted with the KALREZ
valve face gasket.
Fig. 13.2 Removing the Waste Valve
F
D
K
M
G
L
J
I
E
H