cashco 964 Installation, Betrieb und Wartung - Seite 5
Blättern Sie online oder laden Sie pdf Installation, Betrieb und Wartung für Kontrolleinheit cashco 964 herunter. cashco 964 16 Seiten. Globe-style pneumatic control valve unit body iom
Seite druckenNOTE: To fully disengage the actuator stem (6)
from the plug/stem (3) is a two-step pro ce dure.
Be aware of the valve's stroke length as in di cat ed
on the name plate (40) before be gin ning dis en-
gage ment. During the dis en gage ment, mea sure
the dis tance ex tend ed, and stay at least 1/8" (3
mm) away from the full stroke length. Count and
record the number of rev o lu tions for each step in
the box below:
For Steps 5 and 6: Count the number of revolutions
to disengage plug/stem from actuator stem:
Step A.
TOTAL:
5. For ATO-FC Reverse Action Units:
a. (Note PA.)
b. Step A. Rotate plug/stem (3) CW (viewed
from above) to disengage the ac tu a tor
stem (6) from the plug/stem (3), while
holding the actuator stem (6). Record
the num ber of plug/stem rev o lu tions for
Step A above. When the dis en gage ment
reach es about 50% of full stroke trav el
Step A is com plet ed. (Note RP).
c. Step B. Support the actuator as sem-
bly (AA) from above.
yoke nut (29).
sem bly (AA) up wards ap prox i mate ly
1/4"-3/8" (6-8 mm). Again, rotate plug/
stem (3) CW (viewed from above) to
dis en gage the ac tu a tor stem (6) from the
plug/stem (3) while holding the ac tu a tor
stem (6). Record the number of plug/
stem (3) rev o lu tions for Step B above.
This should allow the stems (6) (3) to
fully dis en gage.
NOTE: Take notice of the parts "dan gling
loosely" about the plug/stem (3), the order
of their lo ca tion and their proper orientation.
d. Fully raise the actuator assembly (AA)
from the valve body assembly (BA).
Re move cautiously to prevent dan gling
parts - position indicating washer (26),
ac ces so ry plate ((AP)), yoke nut (29) -
from fall ing.
IOM-964
Step B.
Fully loosen
Lift the actuator as-
6. For ATC-FO Direct Action Units:
a. Step A. Rotate plug/stem (3) CW (viewed
from above) to disengage the ac tu a tor
stem (6). Do not rotate the plug (3)
into the seat (11). Record the number
of plug/stem (3) rev o lu tions for Step
A above. When the dis en gage ment
reach es about 75% of full stroke travel,
Step A. is com plet ed.
b. Step B. Support the actuator as sem bly
(AA) from above. Fully loosen yoke nut
(29) and remove. Lift the actuator as sem-
bly (AA) upwards ap prox i mate ly 1/4" -
3/8" (6-8 mm). Again, rotate plug/stem
(3) CW (viewed from above) to dis en-
gage the ac tu a tor stem (6) from the plug/
stem (3), while holding the actuator stem
(6). Record the number of plug/stem
rev o lu tions for Step B. This should al-
low the stems (6) (3) to fully disengage.
NOTE: Take notice of the parts "dangling
loosely" about the stem (3), the order of their
lo ca tion and their proper orientation.
c. Fully raise actuator assembly (AA) from
the valve body assembly (BA). Re move
cau tious ly to prevent dan gling parts – po-
si tion indicating washer (26), ac ces so ry
plate ((AP)), yoke nut (29) - from falling.
C. Actuator Replacement:
1. Secure body assembly (BA) in a vise with
the plug/stem (3) oriented ver ti cal ly. Push
plug/stem (3) down until the plug touches
the seating surface in the body.
2. Secure the actuator assembly (AA) from
above. Use matchmarks from B.1. previous
to assist with (BA) and (AA) alignment.
3. This procedure assumes that the bonnet (2)
has been bolted to the body (1), with stem
jam nuts (18) threaded on the plug/stem (3).
4. Lower actuator assembly (AA) until the plug/
stem (3) penetrates the opening in the yoke
(3). Re po si tion the "dangling parts" - yoke
nut (29), ac ces so ry plate ((AP)) or in di cat ing
washer (26) - over threaded end of plug/
stem (3). Con tin ue to lower the actuator
assembly (AA) until there is ap prox i mate ly
1/4" (6 mm) space between the two stems
(6) (3).
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