3
Siemens
CE1N4213en
Smart Infrastructure
2020-02-20
Sizing
Flow diagram:
5
L
o
w
n
o
is
e
o
p
e
ra
ti
o
n
9
200
300
400
55,6
83
111
15
16
22
25
12
13
35
37
49
68
73
96
---
Δp
max
for VAI60.. and VBI60.., for details, see table on equipment
combinations
Δp
max
= Maximum permissible differential pressure over the ball valve, valid for the
entire positioning range of the ball valve rotary actuator unit; if low noise
operation is desired, we recommend a maximum permissible differential
pressure of 200 kPa
Δp
v100
= Differential pressure over the fully opened ball valve and over the control
path at a volume flow V
100
100
= Volume flow through the fully opened ball valve
100 kPa
=
1 bar ≈ 10 mWS
1 m
3
/h
= 0.278 l/s water at 20 °C
