Title: +038=370.103-SB005T_03-Energy Valve Reguleringsventil Belimo - Merknader for prosjektering.pdf
For proper operation, the differential pressure across the valve must lie within a defined range.Minimum differential pressure (minimum pressure drop) The minimum required differential pressure (pressure drop across the valve) to reach the desired volumetric flow V'max can be calculated using the theoretical kvs value (see data sheet) and the formula below. The calculated value depends on the required maximum volumetric flow V'max. Higher differential pressures are compensated for automatically by the valve.Formula:∆pmin = 100 x(V'max kvs theor.)2∆pmin: kPa V'max: m3/h kvs theor: m3/hExample:(DN 25 with desired maximum flow = 58% V'nom) EP025R+MP kvs theor. = 8.6 m3/h V'nom = 69 l/min 58% * 69 l/min = 40 l/min = 2.4 m3/h∆pmin = 100 x(V'max kvs theor.)2= 100 x(2.4 m3/h 8.6 m3/h)2= 8 kPa