Data Sheet for Product

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Siemens Electrothermal actuators STA..3.., STP..3.. CE1N4884en
Smart Infrastructure 2020-04-16
Va
lve
Type
De
-
energized actuator
STA.. STP..
Radiator valves VDN.., VEN.., VUN..
Closed Open
1) 2)
Small valves V..P47..
A ↔ AB open
1) 2)
A ↔ AB closed
VD1..CLC
Closed Open
1) 2)
Zone valves V..I46..
AB ↔ A closed AB ↔ A open
1) 2)
PICV VPD.., VPE..
VPP46.., VPI46..
VQP46.., VQI46..
Closed Open
1) 2)
1)
Controller must support NO valve actuator combinations.
2)
Combination not recommended as it makes no sense in terms of energy outside of demand period.
Technical and mechanical design
The electrothermal actuators STA.. and STP.. are noise-free 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. It transfers its
stroke directly to the installed valve.
The valve starts to open after preheating for approx. 1.5 min if the heating element
is switched on in a cold state (room temperature), and achieves the maximum
stroke after another approx. 2 min (230 V) or 3 min (24 V). At power-off, the
expansion element cools down and the valve will be closed by the spring.
This has the following effect for the actuator types below:
The actuator stem retracts and the radiator valve is opened by the own spring. The
actuator stem extends when de-energized and the radiator valve is closed.
The actuator stem extends and the small valve, V..P47.., is opened. The actuator
stem retracts when de-energized and the small valve is closed by the own spring.
The actuator stem retracts and the radiator valve is opened by the spring. The
position of the stem is proportional to the DC 0…10 V positioning signal. The
actuator stem extends when de-energized and the radiator valve is closed. The
actuator deploys to the 50% stroke position if the positioning signal is lost when
applying operating voltage.
DC 0…10 V actuators support various operation modes, see also under DIP-
Switch settings
The actuator stem extends and the small valve, V..P47.., is opened. The position of
the stem is proportional to the DC 0…10 V positioning signal. The actuator stem
retracts when de-energized and the small valve is closed by the own spring. The
actuator deploys to the 50% stroke position if the positioning signal is lost when
applying operating voltage.
DC 0…10 V actuators support various operation modes, see also under DIP-
Switch settings
Note
Response at de-
energized actuator
Actuator ope
rat
ion
STA73.., STA23.. (NC)
2-position, PDM/TPI
STP73.., STP23.. (NO)
2-position, PDM/TPI
STA63..
STA73/00 with
DC 0…10 V module
STP63..
STP73/00 with
DC 0…10 V module