Emerson Fisher Large ED, Instruction Manual

Page: 11 / 28

Instruction Manual
D103553X012
Large ET and ED Valves
July 2017
11
Figure 2. Typical Packing (Continued)
A6060
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS:
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
GRAPHITE RIBBON/FILAMENT PACKING
SINGLE ARRANGEMENT
DOUBLE ARRANGEMENT
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
PACKING
FOLLOWER
(KEY 13)
PACKING
FOLLOWER
(KEY 13)
GRAPHITE RIBBON
PACKING RING (KEY 7) GRAPHITE RIBBON
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
LANTERN RING
(KEY 8)
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
PACKING BOX
RING (KEY 11)
Table 3. Packing Flange Nut Torque for Packing Without a Spring
VALVE STEM
DIAMETER
PRESSURE
RATING
GRAPHITE‐TYPE PACKING PTFE‐TYPE PACKING
Minimum Torque Maximum Torque Minimum Torque Maximum Torque
mm Inch N
S
m Lbf
S
ft N
S
m Lbf
S
ft N
S
m Lbf
S
ft N
S
m Lbf
S
ft
31.8 1‐1/4
CL150 & 300
CL600
33
45 24.3
33.2 49
67 36.1
49.4 16
21 11.8
15.5 25
33 18.4
24.3
50.8 2
CL300 43 32 65 48 20 15 31 23
CL600 61 45 91 67 27 20 41 30
Table 4. Body‐to‐Bonnet Bolt Torque
BOLT SIZE, INCH THREADS PER INCH
BOLTING TORQUE
(1)
N
S
m Lbf
S
ft
1-1/4 8 990 730
1-1/2 8 1750 1290
1-3/4 8 2806 2070
2 8 4244 3130
1. Torque values listed apply to the following stud and nut materials lubricated with Lubriplate MAG-1.
• SA-193-B7 studs with SA-194-2H nuts
• SA-193-B7M studs with SA-194-2HM nuts
• SA-193-B16 studs with SA-194-7 nuts
• SA-193-B8M Class 2 studs with SA-194-8M nuts
• N07718 HT studs with N07718 HT chrome coat nuts
• SA479 S20910 chrome coat studs with SA479 S20910 nuts
For ET/EWT Valves, using the below procedure, disassemble the seat ring from the cage:
a. Grind or file off the two tack welds that prevent the seat ring from unscrewing from the cage.
b. Install 3/8'-16 UNC-2A bolts or cap screws into the two equally spaced tapped holes in the bottom of the seat
ring. These bolts or cap screws will need to have a minimum of 0.5 inches of thread engagement and the length
will be determined by the pry bar diameter used in this step.
c. Using a pry bar to pry against the cap screws, turn the seat ring counter-clockwise to unscrew it from the cage.
d. Set the seat ring on a protective surface taking care not to damage the seat ring seal ring (key 223).