Hydronic Comfort Controls

TWA actuators

TWA actuators are used to electrically activate valves on hot water heating systems, where slow opening and closing is desirable to eliminate water hammer associated with quick acting valves. TWA is a low voltage (24V), low power consumption actuator equipped with a visual indicator to show the open or closed position of the valve. TWA actuators can be selected to create either a normally open or a normally closed control. Maximum ambient temperature is 140F (60C).

TWA actuators

Technical data

Code No.TypeConnectionSupply Voltage
Valve Function


088H3110 TWA-ARA 200024NC
088H3111 TWA-ARA 200024NO
088H3114 TWA-ARA 200024NC/S (with end-switch)


088H3120 TWA-VVMT (065F0102, 065F0104)24NC
088H3121 TWA-VVMT (065F0102, 065F0104)24NO


1 Documents Found: 1 data sheet

Data sheet
TWA Electric Valve Actuator VDSKE322
TWA_DS_Jan_2017_VDSKE322.pdf (0.9 Mb), Literature number: VDSKE322, Language: US English, Release date: 17/01 2017