Argus Ball Valve EK, FK and HK Operating Manual – BA1000 EN
Annex D: Max. Permissible Screw Tightening Torques for Stuffing Box
Page 65 of 67
Annex D: Max. Permissible Screw Tightening Torques for Stuffing Box
Argus
Type/
Valve
Series
DN/Size
Class
Stem
Screws
Maxim
u
m
tig
h
te
n
in
g
to
rqu
e
s f
or
st
u
ffin
g
boxes*
*
DN
NPS
Quantity
Size
Torque Nm
FK
79
15–25
0.5″–1″
150
2FL SW12
2
M10
13
300
2
13
600
2
17
40–50
1.5″–2″
150
2
13
40–50
1.5"–2"
300
2FL SW17
2
M10
16
600
2
21
FK
7
5M
/ FK
7
6M
80–100
3″–4″
150
2FL SW19
2
M12
22
300
2
22
600
2
29
900
2FL SW36
2
M16
106
150–200
6″–8″
150
2
M16
54
300
2
54
600
2
71
900
4KT SW55
2
M20
182
250–300
10″–12″
150
4KT SW55
2
M20
93
300
4KT SW55
2
93
600
4KT SW55
2
121
900
W 80
2
239
350–400
14″–16″
150
4KT SW55
2
M20
122
300
4KT SW55
2
122
600
W 80
2
159
900
W100
2
M24
517
HK
35
50
2″
900
2FL SW19
2
M12
43
1500
2
72
2500
4KT SW27
2
M12
120
80
3″
900
4KT SW27
2
M16
87
1500
2
145
2500
W 60
2
M27
120
100
4″
900
4K SW36
2
M16
106
1500
2
177
2500
4K SW55
2
M27
150
150–200
6″–8″
900
4K SW55
2
M20
90
1500
2
90
2500
W75
2
M27
220
250
10"
900
W80
2
M20
117
1500
2
117
2500
W100
2
M30
390
300
12″
900
W80
2
M20
117
1500
W90
2
M30
290
2500
W120
2
M36
550
W120
4
M30
230
** For Argus Ball Valves not listed, please contact Flowserve Flow Control GmbH.
