Fisher NPS 12 Instruction Manual page 8

Large ET and ED Valves
July 2014
Figure 3. Typical Packing
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
WASHER
(KEY 10)
SPRING
(KEY 8)
PACKING BOX
RING (KEY 11)
FOR S31600 OR S17400 SST
METAL PACKING BOX PARTS
ASSEMBLY 1 ASSEMBLY 2
(POSITIVE (VACUUM)
PRESSURES)
NOTE:
PACKING SET (KEY 6) (2 REQUIRED FOR DOUBLE ARRANGEMENTS)
B2398
8
FEMALE
ADAPTOR
PACKING RING
MALE
ADAPTOR
LOWER WIPER
PTFE V-RING SINGLE ARRANGEMENTS
ASSEMBLY 3
(POSITIVE
PRESSURES &
VACUUM)
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
PTFE V-RING
DOUBLE ARRANGEMENTS
FEMALE
ADAPTOR
PACKING RING
MALE
ADAPTOR
LOWER
WIPER
FOR ALL OTHER METAL PACKING
BOX PART MATERIALS
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
MALE
ADAPTOR (KEY 31)
PACKING RING (KEY 7)
FEMALE
ADAPTOR (KEY 32)
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
LOWER
WIPER
Instruction Manual
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
SPACER (KEY 8)
PACKING BOX
RING (KEY 11)
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
PACKING RING (KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
PTFE/COMPOSITION
ARRANGEMENT
D103553X012