IM-P357-29
CTLS Issue 14
18
4.1.2 PN9100R, PN9200R, PN9300R or PN9400R spring-retract actuators
only
Note:
Adjustment of the spring will only alter the pressure of the control signal air at which
the valve commences to move off its seat (set point) and will not alter the spring pressure
range required to move the valve through its full travel. i.e. 0.2 to 1.0 bar spring (range
0.8 bar) set to commence to lift at 0.4 bar will require a 1.2 bar air pressure (0.4 + 0.8) to
obtain valve full travel.
To adjust the set point refer to Figure 3 and proceed as follows:
-
Ensure the control valve has been isolated and the actuator housing is pressure free.
-
Loosen and remove the clamp nuts and screws (
26
and
27
, see Figure 8) and remove
the valve adaptor (
11
).
-
Using two spanners whilst holding the actuator spindle (
6
) loosen the actuator connector
lock-nut (
25
).
-
Apply the control signal pressure required to complete the full travel of the actuator
spindle.
-
With the valve plug remaining on its seat adjust the valve adaptor (
11
) until it presses
tightly against the connector (
10
). See Figure 7 for correct installation.
Caution:
Two female threads must be visible inside the adaptor when fitted to the valve
spindle.
-
Fit the front and rear clamps (
13
and
14
) across the collar (
12
) and valve adaptor (
11
).
-
Ensure that the screws (
26
) and the nut (
27
) are not damaged.
-
Fit the clamp locking screws and nuts (
26
and
27
) and loosely tighten. Operate the unit
over its full travel four times to ensure alignment. Tighten the locking screws and nuts
to 2 N m (1.5 lbf ft).
-
Release the air control pressure and recheck that the valve just commences to move
toward the seat at the right spring range (minimum pressure), and is fully closed at the
spring range (maximum pressure). After the test check the position of the scale travel
indicator against the 'arrow' of the connector and adjust its position accordingly.
Warning:
To prevent damage to the valve seat, please ensure the plug does not turn while
pressing on the seat during assembling or adjustment.
To prevent damage to the
diaphragm, ensure the actuator spindle (6) is not allowed to rotate when the
diaphragm is assembled within its housing.
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...
