Instruction Manual
D100391X012
EDR and ETR Valves
March 2016
9
Installing the Parts into the Valve Body
1. Stack the valve trim parts using figures 11 and 12 to determine the sequence of parts.
2. Lubricate the stud bolts (key 15) before installing the valve trim into the valve body. (Note: For ease of installing
trim parts, remove all packing parts from the packing box before installing the trim parts.)
3. When inserting the stack of trim parts into the valve body, carefully align the parts in the recess of the valve body.
4. Slide the bottom flange onto the stud bolts (key 15). Secure the bottom flange (key 31) in place on the valve body
with the hex nuts (key 16). Tighten the hex nuts to the torque value shown in table 3.
5. Torque the nuts in a criss‐cross pattern. Repeat the pattern until all nuts are torqued to the value indicated in table
3.
6. Refer to the Packing Maintenance procedures below.
Packing Maintenance
This procedure covers PTFE V‐ring, graphite ribbon/filament, and PTFE composition packing rings. Key numbers refer
to figure 5 for PTFE V‐ring packing and PTFE/composition packing, unless otherwise indicated.
Note
If the valve has ENVIRO‐SEAL live‐loaded packing installed (figure 8, 9, or 10), see the Fisher instruction manual entitled
ENVIRO‐SEAL Packing System for Sliding‐Stem Valves (D101642X012)
for packing instructions.
For all except spring‐loaded packing,
if the packing is relatively new and tight on the stem, and if tightening the
packing flange nuts does not stop the leakage, it is possible that the valve stem is worn or nicked so that a seal cannot
be made. If the leakage comes from the outside diameter of the packing follower, it is possible that the leakage is
caused by nicks or scratches around the inside of the packing box wall.
For spring‐loaded single PTFE V‐ring packing,
the spring (key 8) maintains a sealing force on the packing. If leakage is
noted around the packing follower (key 13), check to be sure the shoulder on the packing follower is touching the
bonnet. If the shoulder is not touching the bonnet, tighten the packing flange nuts (key 5, figure 4) until the shoulder
is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Removing Packing and Installing
Packing procedures below.
Removing Packing
WARNING
Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.
The packing may have been removed in earlier steps, or during trim maintenance procedures. Use the following steps,
when necessary, to remove packing and associated assemblies.
Key number locations for packing parts are shown in figures 5 and 6. For valve parts and the live loaded packing
system, refer to figures 8 through 10 (in the Parts List section), for key number locations.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
