ABB i-bus
®
KNX
Planning and application
© 2008 ABB STOTZ-KONTAKT GmbH
251
4.6.3
Valve curve
The Room Master 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.
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 position
Valve control
value
0 %
100 %
0 %
100 %