Title: 370.02-SB401 - Siemens VXF40.80-100.pdf
Commission the valve only if the actuator has been mounted correctly.Valve stem retracts: Valve stem extends:through-port A – AB opens, bypass B closes through-port A – AB closes, bypass B opens3-port seat valves PN16 with flanged connectionCA1N4430en 2013-09-06MaintenanceWarningStem sealing glandDisposalWarrantySiemens Building TechnologiesVXF40.. valves require no maintenance.When doing service work on the valve / actuator: • Deactivate the pump and turn off the power supply • Close the shutoff valves • Fully reduce the pressure in the piping system and allow pipes to completely cooldownIf necessary, disconnect the electrical wires.Before putting the valve into operation again, make certain the actuator is correctly fitted.The glands can be exchanged without removing the valve, provided the pipes are depressurized and cooled off and the stem surface is unharmed. If the stem is damaged in the gland range, replace the entire stem-plug-unit. Contact your local office or branch.