BALL VALVES - FS900 SERIES
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
13
BREAK TORQUE VALUES (NM) - PTFE/REINFORCED PTFE SEATS
Valve
Size mm
Line Pressure - Mpa
Maximum
Stem Torque
(NM)
1
2
3
4
5
7
9
10.3 13.8
8, 10, 15
4
4
5
5
6
6
6
7
7
13
20
10
10
11
12
13
13
14
14
15
28
25
12
13
14
15
16
17
19
19
20
31
32
14
15
16
17
18
20
24
24
25
40
40
20
20
21
22
23
24
26
26
27
50
50
23
24
24
25
25
26
28
28
29
52
ETC = BTO X .75. BTC = BTO X 1.0. Theoretical time shown only.
No safety factor is included. Theoretical torque only, actual torque will vary. When conditions below apply, then
calculate torque using the following application factors:
PEEK SEATS
up to +80% to all torques shown
FREQUENCY OF OPERATION
Less than once per month
+25%
Less than once per month
+40%
Less than once per year
+60%
SERVICE CONDITIONS
Light slurry semi solids
+40%
Heavy slurry and some solids
+75%
Temp. -40ºC to -20ºC
+75%
Temp. -20ºC to 0ºC
+25%
Temp. Over 150ºC
+40%
Cv/KV FULL PORT 2000 PSI
Size in.
Cv Factor
GPM
KV Factor
M
2
/H
1/4” (8NB)
7
6.0
3/8” (10NB)
7
6.0
1/2” (15NB)
8
6.8
3/4” (20NB)
13
11
1” (25NB)
32
27.5
1 1/4” (32NB)
48
41.0
1 1/2” (40NB)
82
70.0
2” (50NB)
120
103.0
2 1/2” (65NB)
445
381
3” (80NB)
680
583
