3 breakaway torques, 4 flow values, 5 pressure-temperature-diagram – Richter KNP-D/F Series Ball Valves (ISO/DIN) User Manual
Page 5: Breakaway torques, Flow values, Pressure-temperature-diagram, Series kn/f, knp/f, kn-d/f, knp-d/f
Series KN/F, KNP/F, KN-D/F, KNP-D/F
Page 5
520-050-en
Revision 10
TM 8361
Edition 10/2011
Body screws
Nom. size
Screws
Tightening torque
[mm]
[ISO/DIN]
[Nm]
[in-lbs]
15
4 x M12
35
310
20
4 x M12
35
310
25
4 x M12
35
310
40
4 x M16
45
398
50
4 x M16
45
398
80
8 x M16
50
442
100
8 x M16
60
531
150
8 x M20
150
1330
200/150
8 x M20
150
1330
1.3 Breakaway torques
Test medium: water 20
°C
Higher breakaway torques may occur with other
media.
Ball/stem unit
DN
p in bar
B 3
6
10
16
max. adm.
[mm]
[Nm]
[Nm]
[Nm]
[Nm]
[Nm]
15
8
8
8 10
70
20
8
8
8 10
70
25
12
12
12 12
70
40
20
20
20 25
225
50
25
25
25 30
225
80
60
60
65 80
500
100
80
80
90 170
500
150
200
250
350
---
2200
200/150 200
250
350
---
2250
Al
2
O
3
-ball
DN
p in bar
B 3
6
10
16
max. adm.
[mm]
[Nm] [Nm] [Nm] [Nm]
[Nm]
15
10 10 10
12
28
20
10 10 10
12
28
25
12 12 12
12
28
40
20 25 30
45
80
50
25 30 35
50
120
80
60 100 160
220
250
100
80 130 200
280
350
150
350 450 600
---
1200
200/150 350 450 600
---
1200
1.4 Flow values
Nennweite
Kv100
Cv
[mm]
[m
3
/h]
[US gpm]
15
17,5
20
20
31
36
25
75
87
40
200
233
50
310
361
80
800
932
100
1250
1456
150
2800
3262
200/150
3200
3728
1.5 Pressure-temperature-diagram
When used in the minus temperature range,
the regulations applicable in the country in
question must be observed.
A special core material is used for the ball/stem unit
for operating limits under – 10 °C to – 60 °C.
Ball/stem unit
Al
2
O
3
-ball