User Manual

Hydronic balancing with standard

control valves

To create a balanced hydronic system

with standard control valves you must

first determine design flow rates and

calculate the pressure losses across the

whole hydronic network. Then you

determine a valve type, size and proper

flow coefficient. In the next step you

need to make sure that the selected

valve has sufficient control authority

for the job. After that, you also need to

calculate and select a manual balancing

valve for this consumer. You must

repeat this process for all consumers

and commission the whole system by

manually adjusting the position of all

balancing valves.

Now the system is balanced. But it is

only statically balanced, which means

that as soon as your hydronic distribu

tion network operates at part load, the

system is no longer balanced and runs

inefficiently. This leads to high costs

and energy consumption that could be

avoided. Also, the room’s comfort is

impaired because pressure fluctuations

siemens.com/hydronic-balancing

Do it right:

Dynamic hydronic balancing

Hydronic balancing means, the right amount of water at the right time in the right

place. Sounds easy! But is it? There are several solutions, but one is definitely the right

way to do it.

Static hydronic balancing: Uneven energy distribution under part load conditions.

have an impact on the room’s tempera-

ture. Not an optimal solution although

it is still widely used.

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Do it right: Dynamic hydronic balancing siemens.com/hydronic-balancing More on hydronic balancing Hydronic balancing means, the right amount of water at the right time in the right place. Sounds easy! But is it? There are several solutions, but one is definitely the right way to do it.
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Hydronic balancing with dynamic valves Using dynamic valves, such as PICV or Intelligent Valves, in your HVAC system the valves do the balancing for you. There is no need for complex pressure loss and control authority calculations. Only the volumetric flow determines which valve must be used. You also don’t need any additional flow regulating or balancing valves, which means less installation effort. On-site commissioning is extremely simple thanks to easy max flow presetting and automat- ic balancing.