VSD-2

Variable Swirl Diffuser

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VSD-2

Description

The VSD-2 variable swirl diffuser can be used for various ceiling heights from 4 m to 12 m. It enables turbulent airflow, long-range constant airflow and the Coanda effect – where cold air is dispersed below the ceiling.

Construction

The device includes a casing of nozzle shaped aluminium and six centrally adjustable blades.

Material and finish

Standard: carbon steel with RAL 9010 matte powder coating finish or optionally any other RAL colour.

Option: stainless steel sheet metal AISI 304 SB.

Actuator

Manual (C)

Central manual blade position adjustment

Electric actuator (E)

Prepared for Belimo actuator installation. Upon request the actuator can also be installed on the diffuser housing.

Actuator options:

  • LM230A
  • LM230A SR
  • LM24A
  • LM24A SR

Thermostatic actuator (T)

Thermostatic actuator installed on the diffuser measures intake air temperature and automatically adjusts the position of the blades. It works at temperatures between 22 ºC and 38ºC. It does not need an additional source of energy. Diffuser is set to an optimal position and activated in the factory. At temperature 38 ºC the blades are open at 85º angle. At temperature 20 ºC a mechanical element on the holder stops the blades at a 35º angle.

Kot lopatic

Angle of the blades depending on air temperature

Termostatski mehanizem

Thermostatic mechanism for blade movement

Dimensions

PB-3
  • 1 – plenum box
  • 2 – connection opening
  • 3 – diffuser
  • 4 – reducer
  • 5 – mounting bar
  • 6 – blades
  • 7 – actuator
PB-3
D ø D ø D1 ø D2 ø D3 H H1 H2
160 158 280 260 123 170 40 195
200 198 345 300 158 195 40 230
250 248 425 350 198 230 40 270
315 313 530 415 248 275 40 320
400 398 660 500 313 340 60 385

Accessories and Options

PL

Plate with dimensions 595 × 595 mm for installation in prefabricated ceilings (PL)

ZM

Ball impact protection in gyms (ZM)

PP

Perforated plate on the neck of the diffuser (PP)

INOX

Stainless steel sheet metal AISI 304 SB

PB-3

Plenum box PB-3

Installation

cev

Installation on air shaft

Komora

Installation on plenum box

Minimum Distance Between Diffusers

Minimum distance between two diffusers must be at least 5 times the diameter of the diffuser at minimum flow and 10 times the diameter of the diffuser at maximum flow.

Min razdalja

Angle of Blades and Air Flow Direction

angle

Angle of air flow

Cold

Cold air

Warm

Warm air

Product Code

VSD-2 Product
C Actuator
315 Diffuser dim.
RAL 9010 Finish
PP Accessories
PB-3 Plenum box
315 Plenum dim.
/ -
250 Connection dim.
H Position
L Damper
ISO 6mm Insulation

Actuator

Options:
  • C – central manual blade position adjustment
  • E – ready for actuator
  • E code – installed actuator
  • T – installed thermostatic actuator

Diffuser dim.

Diffuser diameter in mm

Options: 160, 200, 250, 315, 400 mm

Finish

Standard: RAL 9010 matte

Optional: any RAL colour

Accessories

Options (multiple can be selected):
  • PL – plate 595 × 595 mm for installation in prefabricated ceilings
  • PP – perforated dispersing plate
  • ZM – ball impact protection in gyms

Plenum box

Options:

Plenum dim.

Plenum box dimension in mm (100 – 1000)

Connection dim.

Connection dimension in mm

Position

Connection position. Options:
  • H – horizontal
  • V – vertical

Damper

Options:
  • L – with damper

Insulation

Insulation thickness in mm:

Options: 6, 10, 13, 19 mm