cashco 988 Handbuch für Installation, Betrieb und Wartung - Seite 7
Blättern Sie online oder laden Sie pdf Handbuch für Installation, Betrieb und Wartung für Kontrolleinheit cashco 988 herunter. cashco 988 20 Seiten. Globe-style pneumatic control valve body
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26.
With the cage (10) oriented correctly on the stem
assembly (3), set plug head down into the seat
ring (11). Keep firm hold of the plug/stem with
one hand; use other hand to push cage down into
proper alignment.
27.
Lift bonnet (2) over threaded end of plug/stem
(3) and care ful ly lower bonnet down over stem,
en sur ing that the crit i cal finish zone of the bonnet's
stuffing box is not scratched by the stem's threads.
Align body (1)-to-bonnet (2) flanges to matchmarks
as bonnet comes down over bon net studs (16).
Carefully release plug/stem (3) only when bonnet
is completely resting on the body.
28.
Install bonnet nuts (17) on studs (16) fin ger-tight.
29.
Place packing spacer (9) over end of plug/stem (3)
and care ful ly lower into stuffing box.
30.
Place packing spring (21) over end of plug/stem
(3) and care ful ly lower down into stuffing box.
Figure 3: "STD" and "KRI" Packing Orientation
31.
Place packing washer (7) over end of plug/stem (3)
and care ful ly lower into stuffing box. See Figure 3
for proper packing ori en ta tion.
32.
Carefully place lower adapter (6.3) of packing ring
set (6) over plug/stem's (3) end, properly oriented.
Us ing the packing follower (5), push the lower
adapt er into the bonnet's (2) stuffing box.
33.
Carefully place a packing ring (6.2) properly
ori ent ed over the plug/stem's (3) end and push
into the stuffing box similar to the adapter (6.3).
Re peat for each of the four rings (6.2).
34.
Place upper adapter (6.1) over the stem 3)
35.
Place packing follower (5) with new wiper ring (22)
and new follower bushing (26) tape over the end
of the plug/stem (3).
36.
Place packing flange (4) over end of plug/stem (3)
and over pack ing studs (14).
IOM-988/989-BODY
37.
Install packing stud nuts (15), finger-tight, on top
of the pack ing flange (4).
38.
Continue tightening nuts (15) evenly in 1/2
revolution in cre ments, until the shoulder of packing
fol low er (5) is resting evenly on the upper edge of
the bonnet (2) at the stuffing box.
39.
Thread the two stem jam nuts (52) onto the stem (3)
and rotate as far down the plug/stem as possible.
40.
Push valve stem (3) down into the seat ring
(11). Wig gle the loose assembly to ensure initial
align ment/stack ing.
41.
Tighten bonnet bolting (16,17) in an alternating
cross-pat tern in 1/4 revolution increments to the
following torque lev els:
Size
3/4", 1", 1-1/2"
2"
42.
Reinstall the (AA) as recorded in Sub-Section V.C.
43.
Position suitable end closures – plugs, blind flang es,
etc., – and leak test with 100 psig air pres sure
min i mum. No packing (6) adjustment should be
re quired to get a tight seal.
44.
Recalibrate per Section VI.
E.
Trim and Packing Removal and Replacement for
Units With External Live-Loaded Packing; Opt-EXT,
Opt-KRE, Opt-HTE-Hi, or Opt-HTE-Lo: (See pg. 20
for Item # identification.)
Failure to ensure proper release of forces from Belleville
spring washers can cause flying parts that might cause
bodi ly injury.
1.
Remove (AA) as described in Sub-Sec tion V.B.
Leave (BA) in vise with plug/stem (3) upwards.
2.
Place thread penetrating lubricant on bonnet
bolt ing (16,17) and packing bolting (14,15).
3.
Loosen both packing stud nuts (15) until clearance
ex ists be tween the bottom of the nuts (15) and the
upper retainers (39). See Fig ure 4.
4.
Spacer rings (40) should "spin freely". If stacked
mech a nism (39,40,41) is not "loose" due to
cor ro sion, de bris, packed dirt, etc., tap the spacer
rings lightly with a hammer while at tempt ing to pry
up the spacer ring /lower retainer with a flat tool.
DO NOT REMOVE PACK ING NUTS (15).
5.
Continue to loosen pack ing stud nuts (15) to just
short of dis en gage ment from packing studs (14).
DO NOT RE MOVE PACKING NUTS.
Torque
70-75 ft-lbs (95-102 N-M)
50-55 ft-lbs (68-75 N-M)
WARNING
7