Fisher EWS Series Instruction Manual page 8

EW Valve
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
WASHER
(KEY 10)
SPRING
(KEY 8)
PACKING BOX
RING (KEY 11)
12A7837–A/IL
FOR S31600 (316 SST) OR
S17400 (17 4PH SST)
METAL PACKING BOX PARTS
NOTE:
1 PACKING SET (KEY 6) (2 REQ'D FOR DOUBLE ARRANGEMENTS).
B2398/IL
12A8187-C
ASSEMBLY 1 ASSEMBLY 2 ASSEMBLY 3
(POSITIVE (VACUUM) (POSITIVE
PRESSURES) PRESSURES
& VACUUM)
9.5 mm (3/8 INCH) STEM
B1428-2 / IL
the packing. If leakage is noted around the packing
follower (key 13, figure 4), 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 21)
until the shoulder is against the bonnet. If leakage
8
FEMALE
ADAPTOR 1
PACKING RING
MALE
1
ADAPTOR
LOWER WIPER
SINGLE ARRANGEMENTS
12A7814-C
ASSEMBLY 1 ASSEMBLY 2 ASSEMBLY 3
(POSITIVE (VACUUM) (POSITIVE
PRESSURES) PRESSURES
& VACUUM)
12.7 mm (1/2 INCH) STEM
DOUBLE ARRANGEMENTS
Figure 4. PTFE V-Ring Packing Arrangements
1
FEMALE
ADAPTOR
1
1 PACKING RING
1 MALE
ADAPTOR
1
1
LOWER WIPER
FOR ALL OTHER METAL PACKING
BOX PART MATERIALS
12A7839-A
ASSEMBLY 1 ASSEMBLY 2
(POSITIVE (VACUUM)
PRESSURES)
19.1, 25.4, OR 31.8 mm
(3/4, 1, OR 1 1/4 INCH) STEM
cannot be stopped in this manner, go to the
Replacing Packing procedure.
If there is undesirable packing leakage with other
than spring-loaded packing, first try to limit the
Instruction Manual
Form 2376
March 2007
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
SPACER
(KEY 8)
PACKING BOX
RING (KEY 11)
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER (KEY 13)
MALE ADAPTOR
PACKING RING
FEMALE ADAPTOR
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
ASSEMBLY 3 LOWER WIPER
(POSITIVE
PRESSURES
& VACUUM)