Valve Curve - ABB i-bus KNX FCA/S 1.1M Product Manual

ABB i-bus KNX
4.3.3

Valve curve

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Planning and application
The Fan Coil Actuator controls valves with linear valve curves.
The valve control is matched linearly to the control value.
The valve is closed with a control value of 0 %, i.e. also 0 %.
The valve is fully open with a control value of 100 %, i.e. also 100 %.
The same ratio also applies for all intermediate values.
Valve position
100 %
0 %
0 %
Linear valve curve
These valve curves can be matched for different valve types. Many valves
for example, have practically no flow when barely opened and achieve
maximum flow at 60-80 %. Furthermore, many valves emit an annoying
whistling sound at low flows.
Valve control
value
100 %
138