Emerson Fisher ET Instruction Manual page 7

Instruction Manual
D100398X012
3. Loosen the packing flange nuts (key 5, figure 14) so that the packing is not tight on the valve stem. Remove any
travel indicator parts and stem locknuts from the valve stem threads.
WARNING
To avoid personal injury or property damage caused by uncontrolled movement of the bonnet, loosen the bonnet by
following the instructions in the next step. Do not remove a stuck bonnet by pulling on it with equipment that can stretch
or store energy in any other manner. The sudden release of stored energy can cause uncontrolled movement of the bonnet.
Figure 3. PTFE V‐Ring Packing Arrangements for Plain and Extension Bonnets
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
WASHER
(KEY 10)
SPRING
(KEY 8)
PACKING BOX
RING (KEY 11)
FOR 316 SST
METAL PACKING BOX PARTS
NOTE:
MALE ADAPTOR, PACKING RING, FEMALE ADAPTOR,
1
AND LOWER WIPER ARE PART OF PACKING SET (KEY 6).
2 REQ'D FOR DOUBLE ARRANGEMENTS, EXCEPT LOWER WIPER.
12A7837‐A
B1429‐5
A8187-D
ASSEMBLY 1 ASSEMBLY 2 ASSEMBLY 3
(POSITIVE (VACUUM) (POSITIVE
PRESSURES) PRESSURES
& VACUUM)
9.5 mm (3/8 INCH) STEM
B1428‐5
FEMALE
ADAPTOR
1
PACKING
1
RING
MALE
1
ADAPTOR
LOWER
WIPER
1
SINGLE ARRANGEMENTS
12A7814-D
ASSEMBLY 1 ASSEMBLY 2 ASSEMBLY 3
(POSITIVE (VACUUM) (POSITIVE
PRESSURES) PRESSURES
& VACUUM)
12.7 mm (1/2 INCH) STEM
DOUBLE ARRANGEMENTS
FEMALE
1
ADAPTOR
PACKING
1
RING
MALE
1
ADAPTOR
LOWER
1
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
ET Valve
November 2017
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)
7