Fisher EAS easy-e Instruction Manual page 8

ES Valve
July 2017
Figure 4. PTFE Packing Arrangements for Use in ENVIRO‐SEAL Bellows Seal Bonnets
4. Loosen the packing flange nuts (key 5, figure 8) so that the packing is not tight on the valve stem. Remove any
travel indicator parts from the valve stem threads.
CAUTION
Avoid damage to the seating surface caused by the valve plug and stem assembly dropping from the bonnet after being
lifted part way out. When lifting the bonnet, temporarily install a valve stem locknut on the valve stem. This locknut will
prevent the valve plug and stem assembly from dropping out of the bonnet.
If the cage starts to lift with the bonnet, tap it with a plastic mallet, or other soft material, to be sure it stays in the valve.
5. Completely remove the cap screws (not shown) or hex nuts (key 16; figure 13, 14, or 15) that bolt the bonnet and
valve together and carefully lift the bonnet off.
6. Remove the locknut and separate the valve plug and stem from the bonnet. Set the parts on a protective surface to
prevent damage to gasket or seating surfaces.
8
THRUST
RING
(KEY 39)
SPRING
(KEY 8)
THRUST
RING
12B4185-A SHT 1
12B4182-A SHT 1
(KEY 39)
9.5 mm 12.7 mm
(3/8 INCH) (1/2 INCH)
STEM STEM
FOR S31600 (316 SST)
PACKING BOX PARTS
SINGLE ARRANGEMENTS
BUSHING
(KEY 13)
BUSHING
(KEY 13)
SPACER
(KEY 8)
THRUST
RING
(KEY 39)
12B4183-A 18A0906-D
9.5 mm 12.7 mm
(3/8 INCH) (1/2 INCH)
STEM STEM FOR
NPS 2 VALVES
DOUBLE ARRANGEMENTS
A5863‐1
UPPER WIPER
(KEY 12)
BUSHING (KEY 13)
PACKING SET: (KEY 6)
FEMALE ADAPTOR
PACKING RING
MALE ADAPTOR
SPACER
(KEY 8)
SPACER
(KEY 8)
12B4185-A SHT 2
12B4182-A SHT 2
12.7 mm
9.5 mm
(1/2 INCH)
(3/8 INCH)
STEM
FOR ALL PACKING BOX
MATERIALS EXCEPT S31600
UPPER WIPER
(KEY 12)
BUSHING (KEY 13)
PACKING SET: (KEY 6)
FEMALE ADAPTOR
PACKING RING
MALE ADAPTOR
SPACER
(KEY 8)
18A5338-A
12.7 mm
(1/2 INCH)
STEM FOR
NPS 3 AND 4
VALVES
Instruction Manual
STEM
D100397X012