Data Sheet for Product

2
Siemens
A6V12986007_de--_b
2022-02-07
Use
● Used in interior rooms.
● For Siemens valves:
– Radiator valves: VDN.., VEN.., VUN..
– Small valves: VD1..CLC.., VVP47.., VXP47.., VMP47..
– Zone valves: VVI46.., VXI46..
– PICV: VPP46.., VPI46.., VQP46.., VQI46..
– MiniCombiValves (MCV): VPD.., VPE.., VPU..
● For third-party valves:
– Direct assembly:
Honeywell/MNG, Heimeier, Herz, Comap, Watts (Cazzaniga), Oventrop
– Assembly with adapter: See Accessories [▶ 6]
Technical design
Actuator operation
The electrothermal actuators STA.. and STP.. are noise- and maintenance-free.
When the control signal is applied to the actuator, the temperature of the heating element
rises, which causes the solid expansion medium to expand. The expansion medium
transfers its stroke directly to the installed valve.
The valve starts to open after preheating for approximately 1.5 min if the heating element is
switched on while cold (room temperature), and achieves the maximum stroke after
approximately another 2 min (AC 230 V) or 3 min (AC/DC 24 V).
At power-off, the expansion element cools down and the valve will be closed by the actuator
spring.
NC (Normally Closed)
NO (Normally Open)
Actuators STA..21.. STP..21..
De-energized ● Actuator stem is extended.
● Valve (NO) is closed.
● Actuator stem is retracted.
● Valve (NC) is closed by its own spring.
Behavior at power-
on
● Actuator stem retracts.
● Valve (NO) is opened by its own spring.
● Actuator stem extends.
● Valve (NC) is opened.
Valve Example:
● Radiator valves (V..N..)
● Small valves (VD1..CLC)
● Zone valves (V..I46..)
● PICV (VP..46.., VQ..46)
Typical examples:
● Small valves (V..P47..)
Without actuator ● Valve is opened without actuator.
● Valve stem is extended.
● Valve is closed without actuator.
● Valve stem is extended.
First Open function
The NC version has a First-Open function, that is activated in the delivery state. The First-
Open function is used to mount the actuator on the valve with little force and for flushing the
plant before commissioning. The First-Open function is deactivated during initial startup and
the actuator opens and closes as intended.
To reactivate the first-open function, e.g. before disassembly, the drive can be moved to the
open position using a screwdriver or locked in the energized open state (see mounting in-
structions).