IM-P357-29
CTLS Issue 14
22
5.2 PN9000E spring-extend
5.2.1 Diaphragm kit - How to fit:
Note:
Items
9
and
28
do not apply to the PN9400 actuator.
-
Remove the actuator from the valve as described in Section 5.1.
Note 1:
There are 3 off longer housing screws (
23
) which are fitted to safely allow spring
decompression. These should be removed last after all other screws are removed and
should be loosened evenly to prevent distortion of the housing. Refer to Section 5.4 if
a handwheel is fitted.
-
Lubricate the threads of the three long hex. head screws with a PTFE based grease
before releasing the tension in the springs.
-
Loosen and remove the short housing screws and nuts (
22
,
23
and
24
).
-
Holding each nut with a spanner, rotate the three long hex. head screws a few turns at
a time. Remove the screws and upper housing (
2
).
-
Remove the springs (
5
). Using a spanner to hold the actuator spindle (
6
), loosen the
bolt (
21
). Remove spacer (
8
), 'O' ring (
9
), washer (
28
), diaphragm plate (
3
) and finally
the diaphragm (
4
).
-
Refit the new diaphragm (
4
) and reassemble all items in reverse order, taking care not
to damage the 'O' ring. It is recommended that Loctite 243 be applied to the upper
thread of the spindle (
6
) prior to tightening. Using two spanners, whilst holding the
actuator spindle (
6
) tighten the bolt (
21
). Refer to Table 1, for the recommended tightening
torques.
-
Refit the top housing (
2
) and securing the nuts and screws (
22
,
23
and
24
). Refer to
Section 5.4 if a handwheel is fitted.
Note 2:
Supporting the actuator spindle (
6
) ensures that the diaphragm sits evenly in
the lower housing. Tighten the housing screws evenly to avoid distortion. 3 off longer
housing screws (
23
) are provided on some spring ranges to cater for longer springs. If
supplied, these should be positioned 120
°
apart and tightened evenly prior to fitting the
remaining screws.
To avoid distortion of the diaphragm
do not fully tighten housing screws until all
screws have been fitted. Final tightening should then be carried out.
Table 1 Recommended tightening torques
Actuator
series
Screws and nuts
(Items 22
,
23 and 24)
Bolt
(Item 21)
Size
Torque
Size
Torque
N m
lbf ft
N m
lbf ft
PN9100
M6
7
5.2
M12
40
29.5
PN9200
M10
35
26.0
M12
40
29.5
PN9300
M10
35
26.0
M12
40
29.5
PN9400
M10
60
44.0
M16
40
29.5
Summary of Contents for PN9120
Page 2: ...IM P357 29 CTLS Issue 14 2...
Page 11: ...IM P357 29 CTLS Issue 14 11 Fig 2 PN9400E 12 1 14 4 3 2 7 13 18 16 17 11 10 9 15 6 8 5 19...
Page 21: ...IM P357 29 CTLS Issue 14 21 Fig 10 11 26 and 27...
Page 23: ...IM P357 29 CTLS Issue 14 23 Fig 11 PN9100E spring extend 4 21 6 28 2 8 22 23 and 24...
Page 25: ...IM P357 29 CTLS Issue 14 25 Fig 12 PN9100E spring extend 21 6 2 22 23 and 24...
Page 33: ...IM P357 29 CTLS Issue 14 33 A E D C B Fig 17 F...
Page 41: ...IM P357 29 CTLS Issue 14 41 28 29 25 26 23 11 9 5 21 Fig 23 PN9400 4 3 30 23 19 20...
Page 42: ...IM P357 29 CTLS Issue 14 42...
Page 43: ...IM P357 29 CTLS Issue 14 43...
Page 44: ...IM P357 29 CTLS Issue 14 44...
