Title: +135.01=370.002-LC001T_04-SkyStar_UK_cat_99A4790100_Rev_N_02_17_s.pdf
The valve upstream-downstream minimum differential pressure (“p1” – “p3”), which depends on the valve calibration value, must be exceeded to access the constant flow rate field.DN 15 ModelDN 20 ModelLEGEND:Pd = Min. differential pressure “p1” – ”p3” (bar)E.g., when sizing the system pump, in which the DN 15 valves will be installed and in which 450 l/h are constantly required for each device, consider a useful pressure of 0.3 bar (to compensate the pressure drop of the valve) for each balancing valve. Therefore, the pressure drop values produced by the system balancing valves must be summed and the pump must be sized to produce a pressure equal to or greater than the value obtained previously.Benefits