TWA Thermal Wax Actuator

Brand: Danfoss

The TWA is a small actuator for electrical on/off controls to activate several types of valves and floor heating manifolds. 

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 M30 × 1.5 connection are available. 

Other valves must be verified individually to ensure correct valve closing measurement and valve top geometry.

Specifications

Brand

Ambient Temperature Range

  • 0° to 60° C (32° to 140° F)

BSP Connection

  • G 1” A Male
  • G 1-1/4” A Male
  • G 3/4” A Male
  • 1” BSPT Male
  • 1/2” BSPT Male
  • 3/4” BSPT Male
  • 3/8” BSPT Male
  • 1” BSPP Female
  • 1/2” BSPP Female
  • 3/4” BSPP Female
  • 3/8” BSPP Female

Cable Length

  • 47.2” (120 cm)

Consumption

  • Running Power Consumption: 2 W

Current

  • Maximum

Differential Pressure

  • Maximum

Electrical Contacts

  • Normally Closed
  • Normally Open

Environmental Protection

  • IP41

Flow Rate

  • 0.65 to 4.75 m³/hour

Frequency

  • 50/60 Hz

Metric Connection

  • M30 x 1.5

Supply Voltage

  • 230 V (3 A Pre-fuse)
  • 24 V (Class II (SELV))

Switch Type

  • Normally Closed & Normally Open

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