Danfoss TWA Data sheet
Data Sheet
TWA Thermal Wax Actuator
Application
Ordering
The TWA range covers actuators for 24 V (SELV) or
230 V supply in both normally closed (NC) or normally open (NO) versions (valve positions with no
supply voltage to the actuator).
NC/S versions with end switch are also available for
some actuator types.
The actuator is equipped with a visual position indicator to show the open or closed position of the
valve.
The TWA can be connected to the RA, RTD, RAVL
and RAV-valves from Danfoss. Furthermore versions for valves with Heimeier/MNG/Oventrop
The TWA is a small actuator for electrical on/off
controls to activate several types of valves and floor
heating manifolds.
Actuator Connection type Supply Voltage Function Code no.
TWA-A RA 230 V AC NC/S* 088H3106
TWA-A RA 24 V AC/DC NC 088H3110
TWA-A RA 24 V AC/DC NO 088H3111
TWA-A RA 230 V AC NC 088H3112
TWA-A RA 230 V AC NO 088H3113
TWA-A RA 24 V AC/DC NC/S* 088H3114
TWA-V RAV/VMT 24 V AC/DC NC 088H3120
TWA-V RAV/VMT 24 V AC/DC NO 088H3121
TWA-V RAV/VMT 230 V AC NC 088H3122
TWA-V RAV/VMT 230 V AC NO 088H3123
TWA-L RAVL 24 V AC/DC NC 088H3130
TWA-L RAVL 24 V AC/DC NO 088H3131
TWA-L RAVL 230 V AC NC 088H3132
TWA-L RAVL 230 V AC NO 088H3133
TWA-K M30x1,5** 230 V AC NC/S* 088H3105
TWA-K M30x1,5** 24 V AC/DC NC 088H3140
TWA-K M30x1,5** 24 V AC/DC NO 088H3141
TWA-K M30x1,5** 230 V AC NC 088H3142
TWA-K M30x1,5** 230 V AC NO 088H3143
TWA-D RTD 24 V AC/DC NC 088H3150
TWA-D RTD 24 V AC/DC NO 088H3151
TWA-D RTD 230 V AC NC 088H3152
TWA-D RTD 230 V AC NO 088H3153
* With end-switch (end-switch only 24 V~)
** Connection to Heimeier, MNG and Oventrop valves with M30×1,5 connection. Other valves must be verified individually
to ensure correct valve closing measurement and valve top geometry (see page 3).
M30×1,5 connection are available.
Other valves must be verified individually to ensure
correct valve closing measurement and valve top
geometry.
AI187386475671en-001001 / VDSBY102
© Danfoss | FEC | 2019.07 | 1
Data Sheet TWA Thermal Wax Actuator
Technical specifications
Supply voltage 24 V (Class II (SELV)) and 230 V (3 A pre-fuse)
Max. inrush current 24 V: 350 mA, 230 V: 250 mA
Frequency 50-60 Hz
Running power consumption 2 W
Spindle travel time ~3 min.
Ambient temperature 0 °C to +60 °C
Enclosure IP 41
Cable length 950 mm
Combination overview for Danfoss thermal wax actuator and valves (V) or manifolds (M)
Valve/
Manifold
kvs (m³/H)
RA-N
(V)
0,65 to
1,40
RTD-N
(V)
0,65 to
1,40
RA-C
(V)
1,20 to
3,30
RA-FN
(V)
0,65 to
1,40
RA-G
(V)
2,06 to
4,75
RTD-G
(V)
2,00 to
4,40
RAV-/8
(V)
1,20 to
3,10
VMT-8
(V)
1,50 to
3,10
RAVL-6
(V)
0,20 to
1,50
FHD
(M)
0,10 to
1,10
Max. ∆p (Bar) 0,6 0,6 0,6 0,6 0,2* 0,2* 0,8 0,8 0,6 0,6
Actuator** TWA-A TWA-D TWA-A TWA-A TWA-A TWA-D TWA-V T WA-V TWA-L T WA-A
* The RA-G/ RTD-G 25 valve has a max. Δp = 0,16 bar. Consult valve/manifold datasheets for further information.
** If the actuator should be an 24 V or 230 V and normally open (NO) or normally closed (NC), depends mainly of the appli-
cation, control strategy and the controller connected to the actuator.
Electrical connections
24 V *
230 V~ **
Blue
Brown
* 24 V Class II transformer (SELV)
** 230 V max. 3 A pre-fuse
50-60 Hz
24 V *
230 V~ **
50-60 Hz
Green
Green
24 V~ / 2 A*
Note! All NC-versions are equipped with a red mounting split on the position indicator to secure easy valve
connection. When mounted this split must be removed for correct operation.
2 | © Danfoss | FEC | 2019.07
AI187386475671en-001001 / VDSBY102
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