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Instruction Manual
D103803X012
Troubleshooting
Operation
D Stem adaptor/actuator may be misaligned-- Remove actuator and stem adaptor, then reassemble per assembly
procedures for actuators.
D Over-tightened stem packing-- Loosen packing to hand tight, cycle valve and retighten per procedures following
torque table 4.
D Inadequate air supply-- Increase air supply or install larger solenoid or quick exhaust valve. Refer to actuator
manufacturer's specifications.
Valve will not Rotate
D Valve body ID or bore is clogged-- Flush or clean valve ID and try to cycle valve.
D Actuator is not operating correctly or has failed-- Replace or repair actuator and try to cycle valve.
D Stem keys have sheared-- Remove adaptor and determine why keys sheared, insert new keys, reassemble and try to
cycle valve.
Valve Stem Packing Leaking
D Packing flange bolting is loose-- Tighten packing bolting. See Packing Replacement section, step 7 on page 12 of
this instruction manual.
D Packing is damaged or improperly installed-- Depressurize valve, remove old packing and replace with new per
assembly instruction steps 3 to 5.
Valve Body Gasket Leaking
D Body bolting is loose-- Tighten body bolting per table 3 and figure 2.
D Body gasket dirty or damaged-- Contact your Emerson Process Management sales office.
Table 3. Body Bolt Torque Values
BOLT SIZE
mm
13
16
19
22
25
29
32
35
38
41
44
Inch
lbf•ft
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1000
RECOMMENDED TORQUE
lbf•in
20
240
40
480
65
780
110
1320
165
1980
240
2880
335
4020
450
5400
600
7200
725
8700
12000
Z500 Valve
February 2014
N•m
27
54
88
149
224
325
454
610
814
984
1356
9
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