ABB Aztec 600 User Manual page 69

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