Apparatus pressure loss

Apparatus pressure loss is the generic term for larger pressure losses occurring at certain points in the flow path, e.g. in the domestic water meter (Δp_WZ), in the filter (Δp_FI), in the dosing system (Δp_wz), in the softening system (Δp_Enthärtung), in the central flow-through drinking water heating system (Δp_D-TE), in the domestic water meter (Δp_WO-WZ), in the group drinking water heater (Δp_Gr-TE), etc. The appliance pressure loss is generally proportional to the square of the flow rate (Δp_AP ≈ V² ). A known operating point with a given pressure difference (Δp_g) and a given flow rate (V_g) is required to calculate the appliance pressure loss. These values must be specified by the manufacturer of the respective appliance. In exceptional cases, the appliance pressure loss can also be a fixed pressure difference (e.g. a switching pressure difference).