Model 380 Control Valve
(8 Inch Only)
Dyna-Flo Control Valve Services Ltd.
Phone: 780
•
469
•
4000 Toll Free: 1
•
866
•
396
•
2356 Fax: 780
•
469
•
4035 Website: www.dyna
fl
o.com
P-388M0319A
11
Operation, Parts, and Instruction Manual
Table 2
Body to Bonnet Bolting Torque
Valve Sizes (Inch)
Bolt Torques
B7 & B7M
lbf-ft.
N
•
m
8
2000
2710
Table 1
Bolting Material and Designations
Material
Temperature Limitations
B7 (Standard)
-50
O
F to 900
O
F (-46
O
C to 482
O
C)
B7M (NACE 150-300 ASME Class)
-50
O
F to 900
O
F (-46
O
C to 482
O
C)
Table 3
Valve Stem Connection Assembly Torque and Pin Replacement
VSC Diameter
Inches (mm)
Torque
lbf-ft. (N
•
m)
Hole Size
Inches (mm)
1 (25.4)
310 - 355 (420 - 481)
0.251 - 0.254 (6.38 - 6.45)
1-1/4 (31.8)
610 - 670 (827 - 908)
0.251 - 0.254 (6.38 - 6.45)
Table 4
Seat Ring Cap Screw Lubricant and Torque Values
Lubricant
Seal Construction
Spiral Wound Gasket (Key 23)
Seat Ring O-Ring (Key 31)
lbf-ft.
N
•
M
lbf-ft.
N
•
M
Nickel Based Anti-Seize
45
61
30
41
Table 5
Packing Nut Torque Values
Valve Stem
Diameter
Inch (mm)
ASME
Class
PTFE Packing
Graphite Packing
Min. Torque
Max. Torque
Min. Torque
Max. Torque
lbf-ft.
N
•
m
lbf-ft.
N
•
m
lbf-ft.
N
•
m
lbf-ft.
N
•
m
1 (25.4)
900 / 1500
38
52
57
77
38
52
57
77
1-1/4 (31.8)
900 / 1500
50
68
75
102
50
68
75
102