TWA Series actuators

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Electric zone valve actuators

TWA actuators electrically activate valves on hot water heating systems, where slow opening and closing is desirable to eliminate water hammer associated with quick acting valves.

The 24VAC, 2.0 VA actuators are available in a normally closed or normally open position, and with or without a valve position indicator.


TWA-A Actuator
24VAC 2.0 VA c/w valve position indicator.

Code No. Type Required Valve Body
088H3110 NC RA2000
088H3111 NO RA2000
088H3114 NC 4 Wire w/
end switch

NC=Normally Closed, NO=Normally Open.

TWA-V Actuator
24VAC 2.0 VA

Code No. Type Required Valve Body
088H3120 NC VMT (065F0102 or 065F0104 only)
088H3121 NO VMT (065F0102 or 065F0104 only)

NC=Normally Closed, NO=Normally Open


Type Name Language Valid for Updated Download File type
Catalog Hydronic Specialties Catalog VKKIA122 English United States 20 Mar, 2017 2.0 MB .pdf
Catalog RA2000 Thermostatic Radiator Valve, Electric Zone Valve & Pressure Bypass Valve Catalog_VKGWC122 English United States 21 Jun, 2015 1.3 MB .pdf
Data sheet TWA Series Electric Actuator Datasheet English United States 16 Jan, 2017 877.8 KB .pdf

Related products

  • VMT valve
    VMT valves for thermostatic or electric actuators

    The VMT valve is a 2-way seated valve, used primarily for heating systems. The valve can be combined with the following thermostatic elements from Danfoss: RAVK, ABV, TWA-V or RA2000 wall mount operators.

  • Thermostatic radiator valves
    Thermostatic radiator valves

    Robustly built and designed to meet the rigors of the residential, commercial and industrial sectors, a comprehensive range of Danfoss RA2000 thermostatic radiator valves is available for hot water, one-pipe steam, and two-pipe low pressure steam systems.

  • zone valve packs
    Zone valve packs

    Electronic zone valve packs are electrically activated valve controls that include both the actuator and valve body in one convenient package.


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