Title: 370.02-SC001 - Siemens VKF41.100 (Stengeventil).pdf
10 8 6 5 4 3 2,5 2 1,51 0,8 0,6 0,5 0,4 0,3 0,25= Differential pressure across the fully open butterfly valve by a volume flow 100V& = Volume flow through the fully open butterfly valveDpv100 100V& 100 kPa = 1 bar » 10 mWC1 m3 / h = 0.278 l/s water at 20 °CThe VKF41.. butterfly valves can accommodate flow in either direction.In heating systems, the valve should preferably be installed in the return, where the seal will be exposed to lower temperatures, so extending its service life.Butterfly valves PN6, PN10, PN16CM1N4131en 2013-11-11WarningMounting notesOrientationCommissioning notesMaintenanceCautionDisposalWarrantySiemens Building TechnologiesTo avoid pressure shocks on the butterfly valve, the VKF41.. must be driven to its fully open position (either manually or via positioning signal Y1) prior to activating the pump(s).The Mounting Instructions 4 319 8927 0 are enclosed in the product packaging.