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Type EZR
To assemble a 6 in. / 152 mm cage with attached
restrictor plate (key 71), lightly lubricate the O-ring
(key 121) and place it on the restrictor plate.
Secure the cage to the restrictor plate with the
cap screws (key 126), using a torque of 10 to
12 ft-lbs / 14 to 16 N•m.
For NPS 2 x 1 / DN 50 x 25 sizes, the lower
adaptor (key 132) must be assembled on the
cage before placing in the body. Lightly lubricate
the lower adaptor O-rings (keys 121 and 67) and
place the lower adaptor on a flat surface. Then
press the cage down into the lower adaptor.
5. L ubricate the top and bottom of the outer
edge (bead area) of the diaphragm and place
diaphragm and plug assembly (key 9) on the
cage (key 7) making sure the bead is in the cage
groove. Lubricate the top plug (key 5) recess. For
NPS 2 x 1 / DN 50 x 25 sizes, the upper adaptor
(key 131) must be placed on the cage before the
bonnet (key 2). Lightly lubricate the upper adaptor
O-ring (key 133) and then press the upper adaptor
onto the cage.
6. Prior to installing the travel indicator or travel indicator
plug, install the bonnet (key 2) in proper orientation.
Make sure to use a Type EZR
bonnet. The Type EZR bonnet is nOT
interchangeable with other Fisher™
E-body bonnets. Installing an improper
bonnet can result in stem assembly
breakage and unit failure. The bonnet
can be identified by the Type EZR
markings on the top.
7. L ubricate cap screws (key 3) and secure the
bonnet (key 2), using an even crisscross pattern. It
may be necessary to push down on bonnet to start
cap screws. Tighten cap screws to proper torque
(see Table 13).
18
BOTTOM PLUg
(KEY 11)
FLangED
LOCKnUT
(KEY 13)
O-RIng
(KEY 10)
Figure 9. Diaphragm and Plug Assembly Components
CaUTIOn
DIaPHRagM
(KEY 9)
O-RIng
TOP PLUg
(KEY 70)
8. L ightly lubricate the travel indicator assembly
threads and install the indicator fitting (key 19) into
the bonnet (key 2, Figure 14), tighten to the proper
torque (see Table 13).
Diaphragm and Plug
assembly Maintenance
The diaphragm and plug assembly can be
replaced as a single unit (a diaphragm cartridge) or
individual components within the assembly can be
replaced. When replacing individual components,
inspect each component for damage and wear
and replace parts as needed. Key numbers for the
following assembly and disassembly procedure are
referenced in Figures 9 and 14.
1. Place a screwdriver or similar tool through the hole
in the top plug (key 5).
2. R emove the flanged locknut (key 13) from
the bottom plug (key 11). This loosens the
entire assembly.
On nPS 1, 1-1/4 x 1 and 2 x 1 / Dn 25,
32 x 25 and 50 x 25 bodies, remove the
socket head screw (key 129) and lock
washer (key 130) from the bottom plug.
3. R emove the bottom plug (key 11) and the bottom
plug O-ring (key 10).
4. Remove the diaphragm (key 9).
5. Remove the top plug O-rings (keys 14 and 70).
6. Check all components for damage or wear and
replace as necessary.
7. When reassembling, be sure to lubricate all O-rings
before installing.
8. H old the top plug (key 5). Place the parts on the
top plug in the following order:
O-RIng
(KEY 14)
(KEY 5)
note
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