Instruction Manual
D102175X012
EZ-C, ET-C, and EWT-C Valves
July 2017
12
1. Screw the valve stem (key 7) into the valve plug (key 2). Tighten to the torque valve given in figure 5. Refer to figure
5 to select the proper drill size. Drill through the stem using the hole in the valve plug as a guide. Remove any chips
or burrs and drive in a new pin (key 8) to lock the assembly.
2. Install the seat ring gasket (key 13) and seat ring (key 9).
Note
With some valve plug sizes and configurations, the valve plug will slide through the seat ring retainer and bushing assembly (keys
3 and 26), and in other configurations, it will not.
3. If the valve plug (key 2) will not slide through the seat ring retainer and bushing assembly (keys 3 and 26), proceed
as follows:
a. Place the seat ring retainer and bushing assembly (keys 3 and 26) over the stem of the valve plug and stem
assembly.
b. Install the seat ring retainer and bushing assembly, which also includes the valve plug and stem assembly, on top
of the seat ring, ensuring that the seat ring retainer slips onto the seat ring properly. Any rotational orientation of
the seat ring retainer with respect to the valve body is acceptable.
Table 5. Fisher ET‐C and EWT‐C Valve Stem Torque and Pin Replacement
VALVE STEM DIAMETER TORQUE, MINIMUM TO MAXIMUM
DRILL SIZE, INCHES
mm Inches NSm Lbf‐ft
9.5 3/8 40‐47 25‐35 3/32
12.7 1/2 81‐115 60‐85 1/8
19.1 3/4 238‐339 175‐250 3/16
25.4 1 421‐482 310‐355 1/4
31.8 1‐1/4 827‐908 610‐670 1/4
c. Place the spiral wound gasket, shim, and bonnet gasket (keys 12, 25, and 10) on the shoulder of the seat ring
retainer.
4. If the valve plug (key 2) will slide through the seat ring retainer and bushing assembly (keys 3 and 26), proceed as
follows:
a. Install the seat ring retainer and bushing assembly on top of the seat ring, ensuring that the seat ring retainer
slips onto the seat ring properly. Any rotational orientation of the seat ring retainer with respect to the valve
body is acceptable.
b. Place the spiral wound gasket, shim, and bonnet gasket (keys 12, 25, and 10) on the shoulder of the seat ring
retainer.
c. Slide the valve plug and stem assembly or the valve plug guide and stem assembly into the seat ring retainer and
bushing assembly (keys 3 and 26).
5. Mount the bonnet on the valve body and complete assembly using the Replacing Packing procedures in the
Maintenance section.
6. If the valve has soft metal‐to‐metal seats, refer to the Coining Soft Metal‐to‐Metal Seats section.
ET‐C and EWT‐C Trim Disassembly
Key number locations are shown in figure 9, unless otherwise noted.
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