Instruction Manual
D102175X012
EZ-C, ET-C, and EWT-C Valves
July 2017
11
VALVE STEM STEM TORQUE
DRILL SIZE,
INCHES
D
DIMENSION
mm Inch NSm Lbf‐ft mm Inch
9.5
12.7
19.1
3/8
1/2
3/4
40‐47
81‐115
237‐339
25‐35
60‐85
175‐250
3/32
1/8
3/16
16
19
25
0.625
0.75
1
Perform the following steps to remove the valve trim.
Note
With some valve plug sizes and configurations, the seat ring retainer and bushing assembly (keys 3 and 26, figure 7, 8, and 9) will
come out of the valve body with the valve plug and stem assembly, and in other valve plug sizes and configurations, the valve plug
will slide through the seat ring retainer and bushing assembly, leaving the retainer and bushing assembly in the valve body.
2. With the valve plug and stem assembly out of the valve body, either slide the seat ring retainer, bushing assembly
(keys 3 and 26), gaskets, and shim (keys 10, 12, and 25) up over the valve plug and stem or, lift the seat ring retainer
and bushing assembly, associated gaskets, and shim out of the valve body. If the valve plug is to be reused, protect
the valve plug seating surface to prevent damage.
3. To disassemble the stem, plug, and pin, drive or drill out the pin (key 8) and unscrew the valve stem (key 7) from the
valve plug (key 2).
4. Remove the seat ring and seat ring gasket (keys 9 and 13).
5. Inspect parts for wear or damage that could prevent proper operation of the valve. Clean, inspect and obtain
replacement parts as necessary for reassembly.
EZ‐C Trim Assembly
This procedure assumes that all the trim and associated gaskets were removed from the valve body. If these parts were
not all removed, start the assembly procedure at the appropriate step.
CAUTION
To avoid weakening the stem that may cause failure in service, never reuse an old stem with a new valve plug. Using an old
stem with a new plug requires drilling a new pin hole in the stem, which will weaken the stem. However, a used valve plug
may be reused with a new stem.
Key number locations are shown in figure 8, unless otherwise noted.
Figure 5. Fisher EZ‐C Valve Stem Torque and Pin Replacement
35A5717‐C
GROOVE PIN
(KEY 8)
D
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