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Siemens Electrothermal actuators STA..3.., STP..3.. CE1N4884en
Smart Infrastructure 2020-04-16
Equipment combinations
Technical notes
NO valves
· Valve is opened without actuator (Normally Open)
· The valve stem is fully extended
· Typical examples: Radiator valves (VDN.., VEN.., VUN..), small
valves (VD1..CLC), zone valves (V..I46) and PICV (VP.., VQ..).
NC valves · Valve is closed without actuator (Normally closed)
· The valve stem is fully extended
· Example: Small valve V..P47..
Most third-party valves are NO valves.
NO function
· STA.. actuator stem is extended when de-energized.
· NC valve required.
NC function
· STA.. actuator stem is extended when de-energized.
· NO valve required.
The valve is closed in a de-energized state for most valve applications featuring
thermal actuators
Actuators with the opposite control action, are used when the reverse function is
required: The valve is open in a de-energized state.
The following table displays the appropriate combinations.
Siemens
valve type Actuator Valve type
k
vs
[m
3
/h]
V
&
[l/h] PN class
Data sheet
valve
VDN.., VEN.., VUN.. STA.. Radiator valves 0.09…1.41 –
PN 10
N2105, N2106
VPD.., VPE.. STA.. MCV MiniCombiValves – 25…483 N2185
VD1..CLC.. STA.. Small valves 0.25…2.6 – N2103
VVI46.., VXI46.. STA.. Zone valves 2…5 –
PN 16
N4842
V..P47.. STP.. Small valves 0.25…4 – N4847
VPP46.., VPI46..
(DN10…DN15)
(DN10…DN32)
STP..
STA..
PICV –
–
30…575
30…3400
PN 25 N4855
VQP46.., VQI46.. STA.. On/Off PICV – 30…1800 PN 25 A6V11877580
Third-party valves, connection M30 x 1.5, without adapter
Radiator valves
· Heimeier
· Watts (Cazzaniga)
· Oventrop M30 x 1.5 (as of 2001)
· Honeywell-Braukmann
· MGN
Valves from additional manufacturers upon request
Additional radiator valves with adapters AV.. see "Accessories/Adapter" page 5
k
vs
= Nominal flow value for cold water (5…30 °C) through a fully opened valve (H
100
), at a differential pressure of 100 kPa (1 bar)
V
&
= Volumetric flow at 0.5 mm stroke
NO, NC valves
Valve and actuator
combi
nation
Note
NO function
(Normally Open)