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Swirl diffuser high spaces
Swirl diffuser high spaces

Halton TSA – Swirl diffuser



  • Horisontal radial or vertical compact swirl jet air supply
  • Suitable for heating and cooling applications
  • Specially designed for large and high spaces
  • Supply air pattern can be adjusted either manually or controlled by actuator
  • High induction swirl jet ensures efficient mixing and fast reduction of air velocity
  • Installation using plenum or directly to ductwork


  • Plenum options with measurement and adjustment functions
  • Actuator (with 24 VAC power supply and proportional 0…10 VDC control signal or alternatively self-actuating wax-bulb) for the direction of airflow pattern

Quick selection

Fig.1. Halton TSA (radial jet)

Fig.2. Halton TSA (radial jet) with Halton TRH plenum.

Fig.3. Halton TSA (compact jet)

Fig.4. Halton TSA (compact jet) with Halton TRH plenum.

Dimensions and weight

Halton TSA, manually operated

250 249 382 221
315 314 475 233
400 399 593 246
500 499 735 264
630 629 917 286

Halton TSA,  with electrical actuator

250 249 382 221 430
315 314 475 233 459
400 399 593 246 486
500 499 735 264 499
630 629 917 286 524

Halton TSA,  with wax-bulb actuator

250 249 382 221 273
315 314 475 233 302
400 399 593 246 329
500 499 735 264 342
630 629 917 286 367

Weight (kg)

Halton TSA, manually operated

NS Weight (kg)
250 3.70
315 4.80
400 7.30
500 9.60
630 11.60

Halton TSA, with wax-bulb actuator

NS Weight (kg)
250 4.10
315 5.20
400 7.70
500 10.00
630 12.00


 Part  Material  Note
 Casing  Steel
 Deflector ring or cylinder  Steel
 Front vane panel  Steel
 Knob  Plastic  Colour options: white or black
 Finishing  Painted
White (RAL 9003)
 Special colours available

Product Models

Halton TSA with electric actuator

  • Siemens GDB161.2E/HA actuator with 24 VAC power supply and proportional 0…10 VDC control signal

Halton TSA with wax-bulb actuator

  • Halton TSA can be equipped with a wax-bulb actuator, which work without any power supply. The cylinder position changes according to the temperature of supply air.
  • The temperature range of the wax-bulb actuator is about 20 °C to 27 °C.
  • The time taken to change from radial to compact jet (or the other way around) is 10 – 20 minutes.
  • When warm air is supplied the piston of the wax bulb actuator keeps moving until the TSA supply air pattern is vertical. When cold air is supplied, the Halton TSA supply air pattern is changed back to horizontal by means of a spring.


                     Compact jet                                       Radial Jet

  • The Halton TSA is a high induction swirl diffuser with an adjustable flow pattern. The horizontal radial swirl jet is used mainly in cooling applications that use cool supply air or for ventilation with isothermal supply air.
  • The vertical compact swirl jet with warm supply air is used in heating applications.
  • Adjustment of the supply air pattern is effected by moving the internal adjustment element (cylinder).
  • It is also possible to change from cooling mode to heating mode by adjusting the flow pattern using an electric or wax bulb actuator.
  • The recommended maximum temperature differences between room and supply air temperatures are +15 °C for heating and -15 °C for cooling applications.


The diffuser is connected either directly to the duct by screwing or riveting or alternatively to Halton TRI or Halton TRH balancing plenum.

The front vane panel can be reattached

  • Remove the screws through the front vane panel (sizes 250 and 315) or between the cylinder and casing (sizes 400, 500 and 630), turn and hold the front vane panel to remove.

Take care during installation to ensure that the cylinder can move freely and that the actuator has adequate installation space. There should be at least 50 mm clearance space above the top of the device when the cylinder is in the lowest position. The connection and fixing rivets or screws may not be located more than 50 mm below the upper edge of the diffuser.

A minimum safety distance upstream of the diffuser of 3xD is recommended.

Wiring and DIL switches

DIL switches:
1.  Automatic adaptation of limited movement length to 0-10 VDC control signal
2.  Direction of shaft movement based on 0-10 VDC control signal
3.  Feedback signal

Installation with plenum

Ensure that the actuator has adequate installation space when installed in Halton TRI plenum. It is recommended to install the collar outwards.
The dimensions are with the outlet sleeve outside the plenum and diffuser without any actuator.
Halton TSA with Halton TRI plenum

250 200 TRI-200-250 390-535 310
315 250 TRI-250-315 465-610 400
400 315 TRI-315-400 525-670 500


Code description
1.    Control knob
2.    Casing
3.    Front vane panel
4.    Cylinder

Throw pattern adjustment

The supply air jet is adjusted by changing the position of the cylinder.

When you turn the knob clockwise the throw pattern is changes from radial to compact.

Airflow adjustment

It is not possible to adjust the airflow in Halton TSA itself.
In order to enable airflow adjustment and measurement of airflow rate it is recommended that you connect the diffuser TSA 250, 315 and 400 to the Halton TRI balancing plenum. The supply flow rate is determined by using the measurement and adjustment module MSM.

Pass the tubes and control spindle through the front vane panel.
Measure the differential pressure using a manometer. The flow rate is calculated using the formula below.

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved. Replace the tubes and spindle in the plenum.


Remove the front vane panel and clean the diffuser by wiping it with a damp cloth, instead of immersing it in water.

Option with balancing plenum

Remove the measurement and adjustment module by pulling gently the shaft; (not the control spindle or measurement tubes!).
Wipe the parts with a damp cloth, instead of immersing them in water.

Remount the measurement and adjustment module by pushing the shaft until the module meets the stopper.


The diffuser consists of a frame with fixed internal profiled vane rings and a movable cylinder for throw pattern selection.
The front vane panel, the movable cylinder and the frame are made of powder painted steel, with a white (RAL 9003) as standard colour.

The airflow pattern is adjustable automatically using an electrical or wax-bulb actuator, (in applications where both heating and cooling are required.)

Order Code


D = Connection size
    250, 315, 400, 500, 630

Other options and accessories

 CO = Colour
     SW     White (RAL 9003)
X         Special colour

MO = Actuator type
NA     No actuator
M2     24 VAC actuator, 0…10 VDC control signal
M3     Wax-bulb actuator

ZT = Tailored product
N       No
Y       Yes (ETO)

Sub products

TRH     Plenum
TRI      Plenum

 Code example



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