Emerson Fisher 133H - Page 9

133 Series
9
7. Remove the six cap screws (key 62) from the spring
case (key 8). Lift off the spring case, upper spring
seat (key 41) and spring (key 12). Remove the
diaphragm casing cap screws and hex nuts
(keys 35 and 36), and lift off the upper diaphragm
casing (key 52). Remove the cap screws (key 55)
and mounting bracket (key 56). Inspect the two
mounting bracket gaskets (key 57) and replace
if necessary.
8. Remove the hex nut (key 20), lock washer (key 58)
and spring seat (key 13) from the stem (key 18).
9. Remove the diaphragm plate (key 14), diaphragm
(key 15), diaphragm washer O-ring (key 61), and
sealing diaphragm plate (key 16). Replace the
diaphragm and diaphragm washer O-ring
if necessary.
10. Remove the cap screws (key 53) and lift the
lower diaphragm casing (key 7) off the casing
adaptor (key 60). If necessary, replace the guide
bushing (key 6) and upper stem seal O-ring
(key 19). Before reassembling, coat the O-ring
with a O-ring sealant and lubricant.
Reassembly
When reassembling, observe the following steps
and cautions. During reassembly, check all O-rings
to be certain they are in good condition and replace
if necessary. Coat O-rings (keys 4, 19, and 32) with
Magnalube-G or an equivalent elastomer sealant
and lubricant.
18
20
13
61
PROTECT THE
O-RING
SURFACE
FROM DAMAGE
3/4-INCH
(19,05 mm)
STEM HEX
16
58
14
15
A7007
Figure 7. Stem and Diaphragm Assembly
1. With the Type 133HP completely disassembled,
start the reassembly by applying Magnalube-G
or an equivalent to the stem threads (key 18) and
O-ring (key 61). Place the sealing diaphragm plate
(key 16) on the stem followed by the O-ring
(key 61), diaphragm (key 15), diaphragm plate
(key 14), spring seat (key 13), lockwasher
(key 58), and hex nut (key 20) as shown in Figure 7.
To prevent diaphragm damage, torque the hex nut
(key 20) to 25 to 30 foot-pounds, while using 3/4-inch
(19,05 mm) wrench ats on the stem.
2. If the street elbow (key 51) was removed, it must
be reassembled before mounting the casing
adaptor (key 60). Position the control line
connection (street elbow) so that it points away
from the casing adaptor.
3. Lubricate the O-rings (keys 19, 32, and 54) and
install as shown in Figure 8. Install the casing
adaptor (key 60) to the lower casing (key 7) and
tighten the cap screws (key 53) to 20 to
30 foot-pounds.
4. Insert the stem bearing (key 6) and carefully insert
the stem (key 18).
5. Assemble the upper diaphragm casing (key 52),
mounting plate adaptor (key 56), and mounting
plate gasket (key 57) as shown in Figure 9.
Tighten the cap screws (key 55) to 20 to
30 foot-pounds of torque.