Emerson FISHER NotchFlo DST Instruction Manual page 5

Instruction Manual
Form 5794
February 2005
UPPER WIPER
(KEY 27)
PACKING
FOLLOWER
(KEY 28)
WASHER
(KEY 25)
SPRING
(KEY 24)
PACKING BOX
RING (KEY 26)
METAL PACKING BOX PARTS
NOTE:
1 MALE ADAPTOR, PACKING RING, FEMALE ADAPTOR,
AND LOWER WIPER ARE PART OF PACKING SET (KEY 22).
2 REQ'D FOR DOUBLE ARRANGEMENTS, EXCEPT LOWER WIPER.
12A7837-A
B1429-5 / IL
Figure 3. PTFE V-Ring Packing Arrangements for Plain and Extension Bonnets
1
13A9775-B
12.7 mm
(0.5 INCH)
STEM
SINGLE ARRANGEMENTS
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS;
1
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
Figure 4. Detail of Graphite Ribbon/Filament Packing for
Plain and Extension Bonnets
For spring-loaded single PTFE V-ring packing, the
spring (key 24) maintains a sealing force on the
packing. If leakage is noted around the packing
follower (key 28), 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 21, figure 7 to 13) until the
shoulder is against the bonnet. If leakage cannot be
stopped in this manner, proceed to the Replacing
Packing procedure.
FEMALE
ADAPTOR
PACKING
RING
MALE
ADAPTOR
LOWER
WIPER
FOR 316 SST
SINGLE ARRANGEMENTS
PACKING
FOLLOWER
(KEY 28)
GRAPHITE
RIBBON
PACKING RING
(KEY 23)
GRAPHITE
1
FILAMENT
PACKING RING
(KEY 23)
LANTERN
RING (KEY 24)
PACKING BOX
RING (KEY 26)
13A9776-B
19.1 & 25.4 mm
(0.75 & 1 INCH)
STEM
FEMALE
1
1
ADAPTOR
PACKING
1
1
RING
MALE
1
ADAPTOR
1
LOWER
1
WIPER
1
FOR ALL OTHER METAL PACKING
BOX PART MATERIALS
39B9286 A
Figure 5. Detail of Graphite ULF Packing for Plain Bonnets
If there is undesirable packing leakage with other
than spring-loaded PTFE V-ring packing, first try to
limit the leakage and establish a stem seal by
tightening the packing flange nuts (key 21, figure 7
to 13) to at least the minimum recommended torque
in table 3 or 4. However, do not exceed the
maximum recommended torque in table 3 or 4. or
excessive friction may result. If leakage continues,
replace the packing by following the numbered steps
presented in the Replacing Packing procedure.
NotchFlo DST
UPPER WIPER
(KEY 27)
PACKING
FOLLOWER (KEY 28)
SPACER (KEY 24)
PACKING BOX
RING (KEY 26)
SINGLE ARRANGEMENTS
5