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Using the Combi Valve Sizer app from Siemens, it is very easy to select the right Acvatix combi valve and matching actuator. This way, the design of energy-efficient HVAC plants (heating, ventilation, air conditioning plants) becomes very straightforward:
Enter or get calculated the required maximum volumetric flow, select other features such as type of connection, PN class or DN size – and the ideal type of combi valve will be displayed. The matching type of actuator is just as easy to find. Also, all data sheets are provided.
Now, the right motorized valve is at your disposal, but you would like to know the presetting you need to ensure the required volumetric flow. The Combi Valve Sizer does this job for you as well. 
This also works in the reverse sense, if you would like to find the maximum volumetric flow resulting from a certain presetting.
Siemens combi valves combine in one valve body a control valve, a differential pressure controller to shields against pressure fluctuations in the hydraulic network, and a presetting scale to set the desired maximum volumetric flow. If required, the valves can be supplied with pressure measuring points to acquire the differential pressure across the valve. The Combi Valve Sizer app from Siemens helps you design and implement HVAC plants that employ these smart, multifunctional and pressure-independent valves.

Combi Valve Sizer

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