Trim Maintenance; Disassembly - Fisher EZ easy-e Instruction Manual

EZ Valve
November 2017
Table 3. Recommended Torque for Packing Flange Nuts (Not for Spring‐Loaded Packing)
VALVE STEM DIAMETER
PRESSURE
RATING
mm Inches
9.5 3/8
12.7 1/2
19.1 3/4

Trim Maintenance

WARNING
Observe the warning at the start of the Maintenance section.
This procedure describes how the valve trim can be completely disassembled. When inspection or repairs are required,
perform only those steps necessary to accomplish the task.

Disassembly

Except where indicated, key numbers referenced in the following steps are found in figure 12.
1. Remove the actuator and the bonnet according to steps 1 through 6 of the Replacing Packing procedure of the
Maintenance section.
WARNING
Avoid personal injury or property damage from valve or packing leakage.
Any damage to the gasket sealing surfaces could cause the valve to leak.
The surface finish of the valve stem (key 7) is critical for making a good packing seal. The inside surface of the seat ring
retainer is critical for smooth operation of the valve plug.
The seating surfaces of the valve plug and seat ring (keys 2 and 9) are critical for proper shutoff.
Protect these parts accordingly while disassembling the trim. Gasket selection criteria is provided on page 33 of this
instruction manual.
2. Packing parts can be removed if desired. Replace these parts as described in the Replacing Packing procedure.
Valves with Plain or Extension Bonnets
Perform the following steps to remove the valve trim.
12
GRAPHITE TYPE PACKING
Minimum Torque
NSm LbfSin
CL125,
3 27
CL150
CL250
4 36
CL300
CL600 6 49
CL125,
5 44
CL150
CL250
7 59
CL300
CL600 9 81
CL125,
11 99
CL150
CL250
15 133
CL300
CL600 21 182
Maximum Torque Minimum Torque
NSm LbfSin NSm
5 40 1
6 53 2
8 73 3
8 66 2
10 88 3
14 122 4
17 149 5
23 199 7
31 274 10
Instruction Manual
D100401X012
PTFE TYPE
PACKING
Maximum Torque
LbfSin NSm LbfSin
13 2 19
17 3 26
23 4 35
21 4 31
28 5 42
39 7 58
47 8 70
64 11 95
87 15 131