Cashco 964 - Manual (Page 3)

IOM-964 3
11. Undue piping stress/strain or bend ing torques may not be trans mit ted thru the con trol valve body. One
pipe (inlet or outlet) should be an chored rig id ly for pip ing that is “hot” or “cold” with respect to ambient
tem per a ture; the re main ing pipe (in let or out let) should be sup port ed and guid ed to ensure uni di rec tion al
ex pan sion/con trac tion.
A. General:
1. Maintenance procedures here in af ter are
based upon re mov al of the valve/ac tu a tor
unit from the pipe line where in stalled.
2. Owner should refer to Owner’s pro ce dures for
re mov al, handling and cleaning of non-re us-
able parts, i.e. gaskets, suitable sol vents, etc.
3. Valves supplied from the factory use a gasket
sealant, Federal Process Company, PLS2, or
equal. Owner may use such aids provided the
aids are com pat i ble with the Owner’s fl uid.
4. All indicated Item Numbers that are with
re spect to the actuator portion of a Model
964 are in pa ren the sis and un der scored; i.e
(20). All Item Num bers that are with respect
to the body portion of a Model 964 are not
un der scored; i.e. (32). All Item Numbers that
are with respect to po si tion ers are in double
parentheses; i.e. ((9)).
5. Special care must be exhibited when ro-
tat ing the stem (3) of the valve to not mar
that portion of the surface of the stem (3)
where it contacts with the pack ing (6). To
rotate the stem (3), use the jam nuts (18) or
soft-jawed pliers. (NOTE: When using the
jam nuts (18) to rotate the stem (3), use the
upper jam nut (18) to rotate the stem CW, and
the lower jam nut (18) to rotate the stem CCW,
when viewed from above valve stem (3)).
6. Place matchmarks between the body (1) bon-
net fl ange, the bonnet (2) fl ange, and the yoke
(1) to assist in fi nal ori en ta tion when the body
is dis as sem bled and/or the ac tu a tor moved.
7. Hereafter, whenever text has the fol low ing
no ta tion, “(Note PA.)”, the fol low ing text is to
be ap plied;
“For ATO-FC reverse action units, connect
a temporary air source to the actuator and
pres sur ize to a level suf fi cient to initiate
travel to ap prox i mate ly mid-stroke. (This
pro ce dure is not required for ATC-FO di rect
ac tion units.)”
8. Hereafter, whenever text has the fol low ing
no ta tion, “(Note RP.)”, the fol low ing text is to
be applied:
“For ATO-FC reverse action units, re lease
all tem po rary air pressure. (This pro ce dure
is not re quired for ATC-FO di rect action
units.)”
B. Actuator Removal:
1. Secure the body (1) in a vise with the actuator
as sem bly (AA) oriented ver ti cal ly.
2. (Note PA.) Using blunt end tool, ham mer rap
the tool to loosen yoke nut (17) turning CCW
(viewed from above) ap prox i mate ly 1 rev o lu-
tion. Secure the ac tu a tor stem (19). Loos en
the stem jam nuts (18) by rotating CW (viewed
from above) one-at-a-time until ro ta tion stops.
3. Fully loosen any accessory de vic es that are
con nect ed to the stem (19) or (3) such as
ac ces so ry plate ((AP)) for limit switch or po-
si tion er.
4. Loosen packing (6) by turning nuts (15) CCW
2-3 rev o lu tions. (Note RP.).
NOTE: To fully disengage the actuator stem (19)
from the valve 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 (12) 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 that follows:
SECTION IV
IV. MAINTENANCE
WARNING
SYSTEM UNDER PRES SURE. Prior to per form ing
any maintenance, isolate the valve/actuator from the
sys tem and relieve all pressure. Fail ure to do so
could result in personal injury.