Instruction Manual
D100399X012
EW Valve
July 2017
30
Note
Stud(s) and nut(s) should be installed such that the manufacturer's trademark and material grade marking is visible, allowing easy
comparison to the materials selected and documented in the Emerson/Fisher serial card provided with this product.
WARNING
Personal injury or damage to equipment could occur if improper stud and nut materials or parts are used. Do not operate or
assemble this product with stud(s) and nut(s) that are not approved by Emerson/Fisher engineering and/or listed on the
serial card provided with this product. Use of unapproved materials and parts could lead to stresses exceeding the design
or code limits intended for this particular service. Install studs with the material grade and manufacturer's identification
mark visible. Contact your Emerson Automation Solutions representative immediately if a discrepancy between actual
parts and approved parts is suspected.
12. Properly lubricate the bonnet stud bolts. Install and tighten the bonnet hex nuts to the proper torque.
14. Install the packing flange. Properly lubricate the packing flange stud bolts and the faces of the packing flange nuts.
Figure 16. Double Graphite Ribbon/Filament Arrangements for Use in Fisher ENVIRO‐SEAL Bellows Seal Bonnets
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS; USE
ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
BUSHING
(KEY 13)
SPACER (KEY 8)
9.5 mm
(3/8 INCH)
STEM
12.7 mm
(1/2 INCH) STEM,
FOR NPS 2 VALVES
12.7 mm (1/2 INCH)
STEM, FOR NPS 3 AND
NPS 4 VALVES
GRAPHITE RIBBON
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
12B6102
−
A/IL
18A090
−
E/IL
12B4181
−
A/IL
A5887‐1
For graphite packing,
tighten the packing flange nuts to the maximum recommended torque shown in table 8. Then,
For other packing types,
tighten the packing flange nuts alternately in small equal increments until one of the nuts
reaches the minimum recommended torque shown in table 8. Then, tighten the remaining flange nut until the
packing flange is level and at a 90‐degree angle to the valve stem.