Data Sheet for Product

4
西门子
A6V11168935_en--_d
Smart Infrastructure
2022-02-23
Valve flow characteristic
0…90 º equal percentage
n
ql
= 3.0 to VDI / VDE 2173
Cavitation
Cavitation accelerates wear on the ball and seat, and also results in undesirable noise.
Cavitation can be avoided by not exceeding the differential pressure shown in the Flow
diagram, and by adhering to the static pressures shown below.
Note on chilled water:
To avoid cavitation in chilled water circuits, please ensure sufficient counter pressure at
valve outlet, e.g. by a throttling valve after the heat exchanger. Select the pressure drop
across the valve at maximum according to the 80 °C curve in the flow diagram below.
∆p
max
= Differential pressure with valve almost closed, at which cavitation can largely be
avoided
p
1
= Static pressure at inlet
p
3
= Static pressure at outlet
M = Pump