Title: 370.02-SB401 - Siemens VXF40.80-100.pdf
Guided plug which is integrated in the valve stem. The seats are machined in the valve body. Schematic representation, design variations are possible.4/10Siemens Building Technologies3-port seat valves PN16 with flanged connectionCA1N4430en 2013-09-06SizingFlow diagram "Mixing"Valve flow characteristicSiemens Building TechnologiesΔpmax= Maximum permissible differential pressure across the valve (mixing: port A-AB, B-AB; diverting:port AB-A, AB-B), valid for the entire actuating range of the motorized valveΔpv100= Differential pressure across the fully open valve and the valve’s control path A → AB, B → ABby a volume flow V100V 100 100 kPa = 1 bar ≈ 10 mWC 1 m3/h= Volumetric flow through the fully open valve (H100)= 0.278 l/s water at 20 °C12 0 D 0 3 4 4Through-port0...30 % → linears v k0.8A30...100 % → ngl = 3 as per VDI / VDE 2173/v k w o Fl0.60.40.20A0ABBA - A B0.2 0.40.60.81