Title: Siemens STA73-eng.pdf
De-energized actuator • The actuator’s stem is extended • The 1)valve is closed.6 0 Z 4 8 8 4Actuator > 3 minutes with power • The valve stem is retracted. • The 1)valve is opened.De-energized actuatorThe actuator’s stem is retracted. • The 2) valve is closed.Actuator > 3 minutes with power7 0 Z 4 8 8 4The actuator’s stem is extended • The 2) valve is opened.1) With regard to radiator valves, VPP46../VPI46.. and VVI46../VXI46 . 2) With regard to V..P47..Locking the sliding sleeve, bayonet-ring, triggers the mechanical adaption of the close- dimension. This affects a pre-tensioning for NC types (STA..) on the valve stem resulting in a sealed valve. For NO types (STP..), the actuator stem will be positioned above the valve spindle without pre-tension.Lies in the range between 8.5…13.5 mm 1)Lies in the range between 12.5…17.5 mm 1)1) when used with the supplied standard sliding sleeveElectrothermal actuators STA..3.., STP..3..CE1N4884en 03.05.2012