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Evoqua V10K - Maintenance of the Injector

Evoqua V10K
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V10k automatic 6. Maintenance
27
EN
3 Remove the valve body assembly (11),
replace every 2 years.
4 Replace gasket (13) and spring (14).
5 Press out stem assembly (5, 6, 7, 10) from
above. Replace o-ring (10), replace stem
every 2 years.
6 Clean bore in the diaphragm with soft
cloth.
7 Press in the stem.
8 Screw the valve body assembly (11) in by
hand.
9 Screw plug (15) in, connect the tube to
the manometer.
10 Replace the o-rings (28) in the gas inlet
and outlet (when flexible tubes are used
also 37, 49, 41, 53)
11 Put all parts in place, check for tightness.
The hexagon nut pos. 108 should be locked
and secured with red locking varnish.
The positioner is maintenance-free.
6.4 Maintenance of the injector
(at least once a year)
6.4.1 Injector W3T171367 (1")
The position numbers refer to the drawing
WAE9688.
1 Put the chlorinator out of service, remove
all the chlorine gas out of the tubing.
Refer to 5.5.
2 Drain the operation water tubes.
3 Remove gas tubes from the injector.
Remove operation water tubes as far as
necessary for removing the tailway from
the injector.
Screw out the tailway (marked with a let-
ter)
4 Replace both o-rings. If necessary, screw
away the die from the tip of the tailway
and tighten again.
5 Loosen the 6 bolts (width 13 mm, Pos.
15), take away the cover (13) and put
aside, the bolts still in the holes.
6 Remove diaphragm (11) with clamping
nut (10, 6) and spring (9).
7 Unscrew the clamping nut (10) from the
valve seat (6).
8 Replace the diaphragm (11), spring (9)
and the o-rings (5 and 7). Every two years
replace the valve seat (6), every 5 years
replace the clamping nut (10).
9 Assemble diaphragm, valve seat and
clamping nut, place spring. Put aside on a
clean cloth.
10 Replace o-ring (12)
11 Replace valve stem with ball head (16)
and o-ring (7). Pay attention not to
damage the ball head!
12 Place the diaphragm assembly with spring
over the bolts (15) of the cover and press
down to the body (3), turn the gas inlet to
the desired direction and make the bolt
holes fit.
Insert the bolts and tighten equally.
13 Turn out the plug (17), replace the o-ring
(18).
14 Take out the valve stem (21), replace
spring (19) and o-ring (20), every 2 years
replace also stem (21).
15 Turn out plug (22) with large screw driver.
Replace o-ring (8).
16 Press out valve seat (1), replace together
with o-ring (2).
Press in new seat with o-ring to the stop
using a round rod or plastic tube Ø16 mm
with even front, pay attention that the
cone is on the side of plug (17).
17 Place the stem (21) into the plug (17) and
screw the plug in. Check the stem for free
movement.
18 Screw in the plug (22) with o-ring (8).
19 Replace the o-ring (27) in the gas inlet.
20 Screw in the tailway and connect to the
operation water tube. Connect the gas
line.
21 Check for tightness and function.
6.4.2 Antisyphoninjector W3T171368
(1")
The position numbers refer to the drawing
WAE9689.
1 Put the chlorinator out of service, remove
all the chlorine gas out of the tubing.
Refer to 5.5.
2 Drain the operation water tubes.
3 Proceed with actions described in 6.4.1
NOTICE
Removing the o-rings: Pick with a needle
and pull the o-ring out, don't damage the
tightening surfaces! Apply some acid-free
grease (silicon grease) to the new o-rings
and to the threads.

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