00132318_0
QLV-180-O


00118149_0.
QLV-90


00118143_0.
QLV-180


00132318_0
00118149_0.
00118143_0.

QLV

Polygon casing, 90° or 180° air discharge, for comfort and industrial zones

Polygon displacement flow diffusers

  • Spigot diameter 160 – 630 mm, nominal height 500 – 1750 mm
  • Volume flow rate range 17 – 915 l/s or 62 – 3295 m³/h
  • Perforated plate, square pitch
  • Circular duct connection
  • Duct connection at the top or bottom
  • Integral airflow straightener and conical equalising element


Optional equipment and accessories

  • Wall mount
  • Damper blade for volume flow rate balancing
  • Exposed surface in RAL CLASSIC colours

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    Application

    Application

    • Type QLV displacement flow diffusers are used as supply air units for industrial and comfort zones
    • Attractive design element for building owners and architects with demanding aesthetic requirements
    • Floor-standing installation on walls or in corners
    • Low-velocity airflow, causing only low levels of induction and resulting in low-turbulence displacement ventilation.
    • Excellent air quality in the occupied zone
    • Draught-free and economical ventilation and air conditioning also of larger internal spaces such as shop floors or auditoriums, with several displacement flow diffusers in a regular arrangement
    • For variable and constant volume flows
    • For supply air to room air temperature differences from –6 to –1 K

    Special characteristics

    • Three-way or five-way air discharge
    • Duct connection at the top or bottom
    • Optional damper blade for volume flow rate balancing

    Nominal sizes

    • ∅D: 160, 200, 250, 315, 400, 500, 630 mm
    • H: 500, 600, 800, 1000, 1250, 1500, 1750 mm

    Description

    Variants

    • QLV-90: 90° air discharge
    • QLV-180: 180° air discharge
    • QLV-...-O: Spigot at the top
    • QLV-...-U: Spigot at the bottom

    Parts and characteristics

    • Polygon casing
    • Equalising element and airflow straightener that ensure a uniform supply air discharge
    • Lip seal, optional for QLV-...-O

    Attachments

    • Damper blade for volume flow rate balancing

    Accessories

    • Lip seal
    • Wall mount

    Construction features

    • Spigot suitable for circular ducts to EN 1506 or EN 13180

    Materials and surfaces

    • Top cover, base, spigot and side parts made of galvanised sheet steel
    • S7: Top cover and base made of aluminium
    • Corner and edge trims are extruded aluminium sections
    • Airflow straightener made of plastic
    • Equalising element made of synthetic fibres
    • Lip seal made of rubber
    • Surface powder-coated RAL 9010, pure white
    • P1: Powder-coated, RAL CLASSIC colour
    • S7: Surface galvanised

    Standards and guidelines

    • Sound power level of the air-regenerated noise measured according to EN ISO 5135

    Maintenance

    • Maintenance-free as construction and materials are not subject to wear
    • Inspection and cleaning to VDI 6022

    Technical information

    Function, Technical data, Quick sizing, Specification text, Order code

    • Function
    • Technical data
    • Quick sizing
    • Specification text
    • Order code
    Schematic illustration of QLV-90 with circular spigot at the top
    00110057_0..
    ① Diffuser face
    ② Airflow straightener
    ③ Casing
    ④ Equalising element
    ⑤ Edge trim
    ⑥ Spigot
    ⑦ Bracket for fixing the diffuser to a wall
    Optional
    ⑧ Damper blade for volume flow rate balancing
    ⑨ Lip seal


    00110057_0..
    00110199_0..
    00128503_0
    00128508_0

    Functional description

    Displacement flow diffusers discharge the air from air conditioning systems with a low velocity and near the floor. The low-turbulence airflow creates a pool of fresh air that covers the entire floor area. The convection from people and other heat sources causes the fresh air from the pool to rise and create comfortable conditions in the occupied zone.

    This draught-free and economical type of ventilation is also suitable for large internal spaces, such as auditoriums or shop floors, with several regularly arranged units.

    Displacement ventilation is characterised by low airflow velocities and low turbulence. The air quality in the occupied zone is very high.

    Displacement ventilation with air discharge near the floor is suitable only for cooling. The maximum supply air to room air temperature difference is –6 K.

    Type QLV displacement flow diffusers include an equalising element and air straightener that ensure a uniform air distribution across the entire diffuser area. The perforated sheet metal diffuser face helps to equalise the airflow further. Three-way (90°) or five-way (180°) air discharge.

    With displacement ventilation, i.e. air discharge near the floor, extract air units should be installed in the upper part of a room, above the occupied zone.

    Nominal sizes

    160 × 500 to 630 × 1750 mm

    Minimum volume flow rate, at 0.1 m/s

    17 – 305 l/s or 62 – 1098 m³/h

    Maximum volume flow rate, at 0.3 m/s

    52 – 915 l/s or 185 – 3295 m³/h

    Supply air to room air temperature difference

    –6 to –1 K

    Sound power level, at 0.3 m/s

    43 dB(A) max.


    Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

    QLV-90, sound power level, total differential pressure and near zone

    Nominal size V v0 Damper blade position Lnz
    Nominal size V v0 0° 45° 90° Lnz
    Nominal size V v0 Δpt LWA Δpt LWA Δpt LWA Lnz
    Nominal size l/s m³/h m/s Pa dB(A) Pa dB(A) Pa dB(A) m

    160 × 500

    17

    62

    0.10

    <3

    <15

    3

    <15

    5

    <15

    < 

    160 × 500

    26

    93

    0.15

    4

    <15

    6

    <15

    11

    <15

    < 

    160 × 500

    34

    124

    0.20

    7

    <15

    11

    <15

    20

    16

    < 

    160 × 500

    52

    185

    0.30

    16

    <15

    25

    21

    45

    28

    < 

    200 × 500

    21

    75

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    < 

    200 × 500

    31

    113

    0.15

    3

    <15

    4

    <15

    7

    <15

    < 

    200 × 500

    42

    151

    0.20

    4

    <15

    7

    <15

    13

    <15

    < 

    200 × 500

    63

    226

    0.30

    10

    <15

    17

    16

    28

    23

    < 

    250 × 500

    26

    92

    0.10

    <3

    <15

    <3

    <15

    <3

    <15

    < 

    250 × 500

    39

    139

    0.15

    <3

    <15

    3

    <15

    5

    <15

    < 

    250 × 500

    51

    185

    0.20

    3

    <15

    5

    <15

    8

    <15

    < 

    250 × 500

    77

    277

    0.30

    7

    <15

    11

    <15

    18

    19

    < 

    160 × 600

    21

    74

    0.10

    <3

    <15

    4

    <15

    7

    <15

    < 

    160 × 600

    31

    111

    0.15

    5

    <15

    9

    <15

    16

    <15

    < 

    160 × 600

    41

    149

    0.20

    9

    <15

    16

    <15

    28

    21

    < 

    160 × 600

    62

    223

    0.30

    20

    19

    35

    26

    62

    32

    < 

    200 × 600

    25

    91

    0.10

    <3

    <15

    <3

    <15

    4

    <15

    < 

    200 × 600

    38

    136

    0.15

    3

    <15

    6

    <15

    10

    <15

    < 

    200 × 600

    50

    181

    0.20

    6

    <15

    10

    <15

    17

    16

    < 

    200 × 600

    75

    272

    0.30

    13

    <15

    22

    21

    39

    28

    < 

    250 × 600

    31

    111

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    < 

    250 × 600

    46

    167

    0.15

    <3

    <15

    4

    <15

    6

    <15

    < 

    250 × 600

    62

    222

    0.20

    4

    <15

    7

    <15

    11

    <15

    < 

    250 × 600

    93

    333

    0.30

    9

    <15

    15

    16

    25

    23

    < 

    315 × 600

    38

    138

    0.10

    <3

    <15

    <3

    <15

    <3

    <15

    < 

    315 × 600

    57

    206

    0.15

    <3

    <15

    <3

    <15

    4

    <15

    < 

    315 × 600

    76

    275

    0.20

    3

    <15

    4

    <15

    7

    <15

    < 

    315 × 600

    115

    413

    0.30

    6

    <15

    10

    <15

    16

    19

    < 

    160 × 800

    28

    99

    0.10

    4

    <15

    7

    <15

    12

    <15

    < 

    160 × 800

    41

    149

    0.15

    8

    <15

    15

    <15

    27

    20

    < 

    160 × 800

    55

    198

    0.20

    14

    <15

    26

    23

    47

    28

    < 

    160 × 800

    83

    298

    0.30

    32

    26

    59

    34

    107

    40

    < 

    200 × 800

    34

    121

    0.10

    <3

    <15

    4

    <15

    7

    <15

    < 

    200 × 800

    50

    181

    0.15

    5

    <15

    9

    <15

    17

    16

    < 

    200 × 800

    67

    242

    0.20

    9

    <15

    17

    17

    30

    24

    < 

    200 × 800

    101

    363

    0.30

    20

    21

    38

    29

    66

    35

    < 

    250 × 800

    41

    148

    0.10

    <3

    <15

    3

    <15

    5

    <15

    < 

    250 × 800

    62

    223

    0.15

    3

    <15

    6

    <15

    11

    <15

    < 

    250 × 800

    82

    297

    0.20

    6

    <15

    11

    <15

    19

    20

    < 

    250 × 800

    124

    445

    0.30

    13

    16

    24

    24

    42

    31

    < 

    315 × 800

    51

    184

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    < 

    315 × 800

    77

    276

    0.15

    <3

    <15

    4

    <15

    7

    <15

    < 

    315 × 800

    102

    367

    0.20

    4

    <15

    7

    <15

    12

    15

    < 

    315 × 800

    153

    551

    0.30

    9

    <15

    16

    18

    27

    27

    < 

    400 × 800

    64

    230

    0.10

    <3

    <15

    <3

    <15

    <3

    <15

    < 

    400 × 800

    96

    344

    0.15

    <3

    <15

    3

    <15

    4

    <15

    < 

    400 × 800

    128

    459

    0.20

    <3

    <15

    5

    <15

    7

    <15

    < 

    400 × 800

    191

    689

    0.30

    6

    <15

    10

    <15

    17

    22

    < 

    160 × 1000

    34

    124

    0.10

    5

    <15

    10

    <15

    18

    <15

    0.8

    160 × 1000

    52

    186

    0.15

    11

    <15

    22

    21

    40

    26

    1.0

    160 × 1000

    69

    248

    0.20

    20

    21

    40

    29

    72

    34

    < 

    160 × 1000

    103

    373

    0.30

    46

    32

    89

    40

    162

    45

    < 

    200 × 1000

    42

    151

    0.10

    3

    <15

    6

    <15

    11

    <15

    0.8

    200 × 1000

    63

    227

    0.15

    7

    <15

    14

    15

    25

    22

    1.0

    200 × 1000

    84

    303

    0.20

    13

    15

    25

    23

    45

    30

    < 

    200 × 1000

    126

    454

    0.30

    29

    27

    56

    35

    100

    41

    < 

    250 × 1000

    52

    186

    0.10

    <3

    <15

    4

    <15

    7

    <15

    0.8

    250 × 1000

    77

    279

    0.15

    5

    <15

    9

    <15

    16

    17

    1.0

    250 × 1000

    103

    372

    0.20

    8

    <15

    16

    18

    28

    25

    < 

    250 × 1000

    155

    557

    0.30

    18

    21

    36

    30

    63

    37

    < 

    315 × 1000

    64

    230

    0.10

    <3

    <15

    3

    <15

    4

    <15

    0.8

    315 × 1000

    96

    345

    0.15

    3

    <15

    6

    <15

    10

    <15

    1.0

    315 × 1000

    128

    460

    0.20

    5

    <15

    10

    <15

    18

    21

    < 

    315 × 1000

    192

    690

    0.30

    12

    16

    23

    24

    40

    32

    < 

    400 × 1000

    80

    287

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    0.8

    400 × 1000

    120

    431

    0.15

    <3

    <15

    4

    <15

    6

    <15

    1.0

    400 × 1000

    160

    574

    0.20

    3

    <15

    7

    <15

    11

    17

    < 

    400 × 1000

    239

    862

    0.30

    8

    <15

    15

    19

    25

    28

    < 

    500 × 1000

    98

    354

    0.10

    <3

    <15

    <3

    <15

    <3

    <15

    0.8

    500 × 1000

    147

    531

    0.15

    <3

    <15

    3

    <15

    4

    <15

    1.0

    500 × 1000

    197

    708

    0.20

    <3

    <15

    4

    <15

    7

    <15

    < 

    500 × 1000

    295

    1062

    0.30

    5

    <15

    10

    <15

    16

    24

    < 

    315 × 1250

    80

    288

    0.10

    <3

    <15

    4

    <15

    7

    <15

    1.1

    315 × 1250

    120

    431

    0.15

    4

    <15

    9

    <15

    15

    19

    1.4

    315 × 1250

    160

    575

    0.20

    7

    <15

    15

    19

    26

    27

    1.6

    315 × 1250

    240

    863

    0.30

    16

    22

    34

    30

    60

    38

    2.0

    400 × 1250

    100

    359

    0.10

    <3

    <15

    <3

    <15

    4

    <15

    1.1

    400 × 1250

    150

    539

    0.15

    3

    <15

    5

    <15

    9

    <15

    1.4

    400 × 1250

    200

    719

    0.20

    5

    <15

    10

    <15

    16

    22

    1.6

    400 × 1250

    299

    1078

    0.30

    10

    16

    22

    25

    37

    34

    2.0

    500 × 1250

    123

    443

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    1.1

    500 × 1250

    184

    664

    0.15

    <3

    <15

    4

    <15

    6

    <15

    1.4

    500 × 1250

    246

    886

    0.20

    3

    <15

    6

    <15

    11

    18

    1.6

    500 × 1250

    369

    1328

    0.30

    7

    <15

    15

    20

    24

    30

    2.0

    630 × 1250

    153

    551

    0.10

    <3

    <15

    <3

    <15

    <3

    <15

    1.1

    630 × 1250

    230

    827

    0.15

    <3

    <15

    <3

    <15

    4

    <15

    1.4

    630 × 1250

    306

    1103

    0.20

    <3

    <15

    4

    <15

    7

    <15

    1.6

    630 × 1250

    459

    1654

    0.30

    5

    <15

    10

    15

    15

    25

    2.0

    400 × 1500

    120

    432

    0.10

    <3

    <15

    3

    <15

    6

    <15

    1.5

    400 × 1500

    180

    647

    0.15

    3

    <15

    8

    <15

    13

    19

    1.8

    400 × 1500

    240

    863

    0.20

    6

    <15

    13

    19

    23

    27

    2.1

    400 × 1500

    360

    1295

    0.30

    14

    21

    30

    30

    51

    38

    2.7

    500 × 1500

    148

    532

    0.10

    <3

    <15

    <3

    <15

    4

    <15

    1.5

    500 × 1500

    222

    797

    0.15

    <3

    <15

    5

    <15

    8

    <15

    1.8

    500 × 1500

    295

    1063

    0.20

    4

    <15

    9

    <15

    15

    23

    2.1

    500 × 1500

    443

    1595

    0.30

    9

    15

    20

    25

    33

    34

    2.7

    630 × 1500

    184

    662

    0.10

    <3

    <15

    <3

    <15

    <3

    <15

    1.5

    630 × 1500

    276

    993

    0.15

    <3

    <15

    3

    <15

    5

    <15

    1.8

    630 × 1500

    368

    1324

    0.20

    3

    <15

    6

    <15

    9

    19

    2.1

    630 × 1500

    552

    1986

    0.30

    6

    <15

    13

    20

    21

    30

    2.7

    630 × 1750

    215

    773

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    1.9

    630 × 1750

    322

    1159

    0.15

    <3

    <15

    4

    <15

    7

    <15

    2.4

    630 × 1750

    429

    1545

    0.20

    3

    <15

    8

    <15

    12

    23

    2.8

    630 × 1750

    644

    2318

    0.30

    7

    <15

    17

    24

    28

    34

    3.6

    <: 0.2 m/s are not achieved

    The near zone values are based on a supply air to room air temperature difference of –3 K


    QLV-180, sound power level, total differential pressure and near zone

    Nominal size V v0 Damper blade position Lnz
    Nominal size V v0 0° 45° 90° Lnz
    Nominal size V v0 Δpt LWA Δpt LWA Δpt LWA Lnz
    Nominal size l/s m³/h m/s Pa dB(A) Pa dB(A) Pa dB(A) m

    160 × 500

    25

    89

    0.10

    3

    <15

    5

    <15

    10

    <15

    < 

    160 × 500

    37

    134

    0.15

    8

    <15

    12

    <15

    23

    20

    < 

    160 × 500

    49

    178

    0.20

    13

    <15

    22

    21

    40

    28

    < 

    160 × 500

    74

    267

    0.30

    30

    25

    49

    32

    91

    39

    < 

    200 × 500

    30

    108

    0.10

    <3

    <15

    3

    <15

    6

    <15

    < 

    200 × 500

    45

    162

    0.15

    5

    <15

    8

    <15

    14

    15

    < 

    200 × 500

    60

    217

    0.20

    9

    <15

    14

    15

    25

    23

    < 

    200 × 500

    90

    325

    0.30

    19

    19

    31

    27

    57

    35

    < 

    250 × 500

    37

    132

    0.10

    <3

    <15

    <3

    <15

    4

    <15

    < 

    250 × 500

    55

    198

    0.15

    3

    <15

    5

    <15

    9

    <15

    < 

    250 × 500

    73

    263

    0.20

    6

    <15

    9

    <15

    16

    19

    < 

    250 × 500

    110

    395

    0.30

    13

    <15

    20

    21

    36

    30

    < 

    160 × 600

    30

    107

    0.10

    4

    <15

    8

    <15

    14

    <15

    < 

    160 × 600

    45

    160

    0.15

    10

    <15

    17

    17

    32

    24

    < 

    160 × 600

    59

    214

    0.20

    17

    18

    30

    26

    56

    32

    < 

    160 × 600

    89

    320

    0.30

    39

    29

    68

    37

    126

    44

    < 

    200 × 600

    36

    130

    0.10

    3

    <15

    5

    <15

    9

    <15

    < 

    200 × 600

    54

    195

    0.15

    6

    <15

    11

    <15

    20

    20

    < 

    200 × 600

    72

    260

    0.20

    11

    <15

    19

    20

    35

    28

    < 

    200 × 600

    108

    390

    0.30

    25

    24

    43

    32

    79

    39

    < 

    250 × 600

    44

    158

    0.10

    <3

    <15

    3

    <15

    5

    <15

    < 

    250 × 600

    66

    237

    0.15

    4

    <15

    7

    <15

    12

    15

    < 

    250 × 600

    88

    316

    0.20

    7

    <15

    12

    <15

    22

    23

    < 

    250 × 600

    132

    474

    0.30

    16

    18

    27

    26

    49

    35

    < 

    315 × 600

    54

    196

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    < 

    315 × 600

    82

    294

    0.15

    3

    <15

    4

    <15

    8

    <15

    < 

    315 × 600

    109

    391

    0.20

    5

    <15

    8

    <15

    14

    19

    < 

    315 × 600

    163

    587

    0.30

    11

    <15

    18

    21

    31

    30

    < 

    160 × 800

    40

    142

    0.10

    7

    <15

    13

    <15

    24

    21

    < 

    160 × 800

    59

    214

    0.15

    16

    17

    29

    25

    54

    32

    < 

    160 × 800

    79

    285

    0.20

    28

    25

    51

    33

    96

    40

    < 

    160 × 800

    119

    427

    0.30

    63

    37

    116

    45

    216

    51

    < 

    200 × 800

    48

    173

    0.10

    4

    <15

    8

    <15

    15

    16

    < 

    200 × 800

    72

    260

    0.15

    10

    <15

    18

    20

    33

    27

    < 

    200 × 800

    96

    346

    0.20

    18

    20

    32

    28

    59

    36

    < 

    200 × 800

    144

    520

    0.30

    39

    31

    72

    39

    134

    47

    < 

    250 × 800

    59

    211

    0.10

    3

    <15

    5

    <15

    9

    <15

    < 

    250 × 800

    88

    316

    0.15

    6

    <15

    11

    <15

    21

    23

    < 

    250 × 800

    117

    421

    0.20

    11

    <15

    20

    23

    37

    31

    < 

    250 × 800

    176

    632

    0.30

    25

    26

    46

    34

    83

    42

    < 

    315 × 800

    72

    261

    0.10

    <3

    <15

    3

    <15

    6

    <15

    < 

    315 × 800

    109

    391

    0.15

    4

    <15

    7

    <15

    13

    19

    < 

    315 × 800

    145

    522

    0.20

    7

    <15

    13

    18

    23

    27

    < 

    315 × 800

    217

    783

    0.30

    16

    20

    29

    29

    52

    38

    < 

    400 × 800

    91

    326

    0.10

    <3

    <15

    <3

    <15

    4

    <15

    < 

    400 × 800

    136

    489

    0.15

    3

    <15

    5

    <15

    8

    <15

    < 

    400 × 800

    181

    652

    0.20

    5

    <15

    8

    <15

    15

    22

    < 

    400 × 800

    272

    978

    0.30

    10

    <15

    19

    24

    33

    33

    < 

    160 × 1000

    49

    178

    0.10

    10

    <15

    20

    20

    37

    26

    0.8

    160 × 1000

    74

    267

    0.15

    22

    23

    44

    31

    82

    38

    1.0

    160 × 1000

    99

    356

    0.20

    40

    31

    78

    39

    146

    46

    < 

    160 × 1000

    148

    534

    0.30

    90

    43

    176

    51

    329

    57

    < 

    200 × 1000

    60

    217

    0.10

    6

    <15

    12

    <15

    22

    22

    0.8

    200 × 1000

    90

    325

    0.15

    14

    17

    27

    26

    51

    33

    1.0

    200 × 1000

    120

    433

    0.20

    25

    25

    49

    34

    90

    41

    < 

    200 × 1000

    180

    650

    0.30

    56

    37

    109

    45

    202

    53

    < 

    250 × 1000

    73

    263

    0.10

    4

    <15

    8

    <15

    14

    17

    0.8

    250 × 1000

    110

    395

    0.15

    9

    <15

    17

    21

    31

    29

    1.0

    250 × 1000

    146

    527

    0.20

    16

    20

    30

    29

    55

    37

    < 

    250 × 1000

    219

    790

    0.30

    35

    31

    68

    40

    125

    48

    < 

    315 × 1000

    91

    326

    0.10

    <3

    <15

    5

    <15

    9

    <15

    0.8

    315 × 1000

    136

    489

    0.15

    6

    <15

    11

    15

    19

    24

    1.0

    315 × 1000

    181

    652

    0.20

    10

    <15

    19

    23

    35

    32

    < 

    315 × 1000

    272

    978

    0.30

    22

    26

    43

    35

    78

    44

    < 

    400 × 1000

    113

    408

    0.10

    <3

    <15

    3

    <15

    5

    <15

    0.8

    400 × 1000

    170

    611

    0.15

    4

    <15

    7

    <15

    12

    20

    1.0

    400 × 1000

    226

    815

    0.20

    6

    <15

    12

    18

    22

    28

    < 

    400 × 1000

    340

    1223

    0.30

    14

    20

    27

    29

    48

    39

    < 

    500 × 1000

    140

    503

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    0.8

    500 × 1000

    210

    755

    0.15

    <3

    <15

    5

    <15

    8

    16

    1.0

    500 × 1000

    280

    1006

    0.20

    4

    <15

    8

    <15

    14

    24

    < 

    500 × 1000

    419

    1509

    0.30

    9

    <15

    18

    25

    31

    35

    < 

    315 × 1250

    113

    408

    0.10

    3

    <15

    7

    <15

    13

    19

    1.1

    315 × 1250

    170

    612

    0.15

    8

    <15

    16

    21

    29

    30

    1.4

    315 × 1250

    227

    815

    0.20

    14

    20

    29

    29

    52

    38

    1.6

    315 × 1250

    340

    1223

    0.30

    31

    32

    65

    41

    117

    49

    1.9

    400 × 1250

    142

    509

    0.10

    <3

    <15

    5

    <15

    8

    <15

    1.1

    400 × 1250

    212

    764

    0.15

    5

    <15

    10

    16

    18

    25

    1.4

    400 × 1250

    283

    1019

    0.20

    9

    <15

    18

    24

    32

    34

    1.6

    400 × 1250

    425

    1528

    0.30

    20

    26

    41

    35

    72

    45

    2.0

    500 × 1250

    175

    629

    0.10

    <3

    <15

    3

    <15

    5

    <15

    1.1

    500 × 1250

    262

    943

    0.15

    3

    <15

    7

    <15

    12

    21

    1.4

    500 × 1250

    349

    1258

    0.20

    6

    <15

    12

    19

    21

    29

    1.7

    500 × 1250

    524

    1887

    0.30

    13

    21

    27

    31

    47

    41

    2.1

    630 × 1250

    218

    785

    0.10

    <3

    <15

    <3

    <15

    3

    <15

    1.1

    630 × 1250

    327

    1177

    0.15

    <3

    <15

    4

    <15

    7

    17

    1.4

    630 × 1250

    436

    1569

    0.20

    4

    <15

    8

    <15

    13

    25

    1.7

    630 × 1250

    654

    2354

    0.30

    9

    15

    18

    26

    30

    37

    2.1

    400 × 1500

    170

    611

    0.10

    3

    <15

    6

    <15

    11

    19

    1.5

    400 × 1500

    255

    917

    0.15

    6

    <15

    14

    21

    25

    30

    1.8

    400 × 1500

    340

    1223

    0.20

    12

    19

    25

    29

    45

    38

    2.2

    400 × 1500

    509

    1834

    0.30

    26

    31

    57

    40

    101

    50

    2.7

    500 × 1500

    210

    755

    0.10

    <3

    <15

    4

    <15

    7

    <15

    1.5

    500 × 1500

    314

    1132

    0.15

    4

    <15

    9

    16

    16

    26

    1.9

    500 × 1500

    419

    1509

    0.20

    8

    <15

    16

    24

    29

    34

    2.2

    500 × 1500

    629

    2264

    0.30

    17

    25

    37

    36

    65

    46

    2.8

    630 × 1500

    262

    941

    0.10

    <3

    <15

    3

    <15

    5

    <15

    1.5

    630 × 1500

    392

    1412

    0.15

    3

    <15

    6

    <15

    10

    22

    1.9

    630 × 1500

    523

    1883

    0.20

    5

    <15

    11

    19

    18

    30

    2.3

    630 × 1500

    785

    2824

    0.30

    11

    20

    24

    31

    41

    41

    2.9

    630 × 1750

    305

    1098

    0.10

    <3

    <15

    3

    <15

    6

    <15

    1.9

    630 × 1750

    458

    1648

    0.15

    3

    <15

    8

    15

    14

    26

    2.5

    630 × 1750

    610

    2197

    0.20

    6

    <15

    14

    23

    24

    34

    3.0

    630 × 1750

    915

    3295

    0.30

    14

    24

    31

    35

    54

    45

    4.0

    <: 0.2 m/s are not achieved

    The near zone values are based on a supply air to room air temperature difference of –3 K


    Displacement flow diffusers for air discharge near the floor, suitable for comfort and industrial zones with special demands on architecture and design.

    With three-way (90°) or five-way (180°) air discharge for low-turbulence displacement ventilation. Polygon casing for installation on a wall.

    Ready-to-install component which consists of a casing with spigot at the top or bottom, an equalising element and airflow straightener that ensure uniform supply air discharge, and a perforated sheet metal diffuser face. Spigot suitable for circular ducts.

    Spigot suitable for ducts to EN 13180.

    Sound power level of the air-regenerated noise measured according to EN ISO 5135.

    Special characteristics

    • Three-way or five-way air discharge
    • Duct connection at the top or bottom
    • Optional damper blade for volume flow rate balancing

    Materials and surfaces

    • Top cover, base, spigot and side parts made of galvanised sheet steel
    • S7: Top cover and base made of aluminium
    • Corner and edge trims are extruded aluminium sections
    • Airflow straightener made of plastic
    • Equalising element made of synthetic fibres
    • Lip seal made of rubber
    • Surface powder-coated RAL 9010, pure white
    • P1: Powder-coated, RAL CLASSIC colour
    • S7: Surface galvanised

    Technical data

    • Nominal sizes: 160 × 500 to 630 × 1750 mm
    • Minimum volume flow rate, at 0.1 m/s: 17 – 305 l/s or 62 – 1098 m³/h
    • Maximum volume flow rate, at 0.3 m/s: 52 – 915 l/s or 185 – 3295 m³/h
    • Supply air to room air temperature difference: –6 to –1 K
    • Sound power level, at 0.3 m/s: 43 dB(A) max.

    Sizing data

    • V _______________________ [m³/h]
    • Δpt _______________________ [Pa]

    Air-regenerated noise

    • LWA _______________________ [dB(A)]

    This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

    00135936_0

     Type
    QLV       Displacement flow diffuser

     Air discharge
    90       Three-way
    180       Five-way

     Connection
           Circular spigot
    O       Top
    U       Bottom

     Damper blade for volume flow rate balancing
           No entry: none
    M       With

    		 

     Lip seal
           No entry: none
    L       With (only for top spigot)
           Bottom spigots always have a lip seal

     Nominal size [mm]
           ∅D × H
           Spigot diameter × nominal height

     Fixing
           No entry: none
    W0       With material for wall fixing

     Exposed surface
           No entry: powder-coated
           RAL 9010, pure white
    P1       Powder-coated, specify RAL CLASSIC colour
    S7       Uncoated (galvanised steel, untreated aluminium)

           Gloss level
           RAL 9010 50 %
           RAL 9006 30 %
           All other RAL colours 70 %

    Order example: QLV–180–U/250×500/P1-RAL 9016

    Air discharge

    Five-way

    Connection

    Circular spigot at the bottom

    Damper blade for volume flow rate balancing

    Without

    Lip seal

    Without

    Nominal size

    250 × 500 mm

    Fixing

    Without

    Exposed surface

    RAL 9016, traffic white, gloss level 70 %


     

    Variants, Accessories, Dimensions and weight

    • Variants
    • Accessories
    • Dimensions and weight
    QLV-90-U
    00132313_0


    00132313_0
    00132315_0
    Wall fixing 00224229_0
    ① Wall mount, inner part


    QLV-90-U
    00117613_0....
    QLV-90-U always with lip seal


    00117613_0....
    00117630_0..
    00117624_0...
    00117617_0....

    The nominal size (nominal width × nominal height) is equal to the discharge opening.

    QLV-90

    Nominal size
    		 B1
    mm
    		 H1
    mm
    		 T1
    mm
    		 ØD
    mm
    		 A
    mm
    		 m
    kg
    160×500 250 500 250 158 115 6
    200×500 295 500 295 198 135 6
    250×500 350 500 350 248 160 8
    160×600 250 600 250 158 115 9
    200×600 295 600 295 198 135 7
    250×600 350 600 350 248 160 8
    315×600 420 600 420 313 193 9
    160×800 250 800 250 158 115 11
    200×800 295 800 295 198 135 8
    250×800 350 800 350 248 160 9
    315×800 420 800 420 313 193 11
    400×800 510 800 510 398 235 13
    160×1000 250 1000 250 158 115 12
    200×1000 295 1000 295 198 135 14
    250×1000 350 1000 350 248 160 16
    315×1000 420 1000 420 313 193 21
    400×1000 510 1000 510 398 235 18
    500×1000 615 1000 615 498 285 20
    315×1250 420 1250 420 313 193 26
    400×1250 510 1250 510 398 235 29
    500×1250 615 1250 615 498 285 25
    630×1250 750 1250 750 628 350 32
    400×1500 510 1500 510 398 235 37
    500×1500 615 1500 615 498 285 41
    630×1500 750 1500 750 628 350 46
    630×1750 750 1750 750 628 350 51


    QLV-180

    Nominal size
    		 B1
    mm
    		 H1
    mm
    		 T1
    mm
    		 ØD
    mm
    		 A
    mm
    		 m
    kg
    160×500 240 500 235 158 115 6
    200×500 280 500 275 198 135 7
    250×500 330 500 325 248 160 8
    160×600 240 600 235 158 115 10
    200×600 280 600 275 198 135 7
    250×600 330 600 325 248 160 8
    315×600 395 600 390 313 193 9
    160×800 240 800 235 158 115 11
    200×800 280 800 275 198 135 8
    250×800 330 800 325 248 160 9
    315×800 395 800 390 313 193 11
    400×800 480 800 475 398 235 13
    160×1000 240 1000 235 158 115 12
    200×1000 280 1000 275 198 135 14
    250×1000 330 1000 325 248 160 16
    315×1000 395 1000 390 313 193 20
    400×1000 480 1000 475 398 235 17
    500×1000 580 1000 575 498 285 20
    315×1250 395 1250 390 313 193 25
    400×1250 480 1250 475 398 235 28
    500×1250 580 1250 575 498 285 25
    630×1250 710 1250 705 628 350 31
    400×1500 480 1500 475 398 235 35
    500×1500 580 1500 575 498 285 39
    630×1500 710 1500 705 628 350 44
    630×1750 710 1750 705 628 350 49


    Installation details, Basic information and nomenclature

    • Installation details
    • Basic information and nomenclature

    Installation and commissioning

    • With displacement ventilation and air discharge near the floor, extract air devices should be installed in the upper part of a room, above the occupied zone.
    • If necessary, carry out volume flow rate balancing with the damper blade

    Principal dimensions

    B₁ [mm]

    Width of diffuser face

    B₄ [mm]

    Width of a rectangular spigot

    ØD [mm]

    Outer diameter of the spigot

    ØD₁ [mm]

    Casing diameter

    H₁ [mm]

    Height of diffuser face

    T₁ [mm]

    Casing depth

    T₄ [mm]

    Depth of a rectangular spigot

    m [kg]

    Weight

    Nomenclature

    LWA [dB(A)]

    A-weighted sound power level of air-regenerated noise

    V [m³/h] and [l/s]

    Volume flow rate

    v0 [m/s]

    Theoretical airflow velocity across the diffuser area, at a distance of 0 m from the diffuser face

    Lnz [m]

    Near zone of the displacement flow diffuser, where the comfort criteria may not be achieved

    The near zone is at least 0.5 m, independent of the airflow velocity

    At distance Lnz the airflow velocity is 0.2 m/s max., measured 0.1 m above the floor

    Δtz [K]

    Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

    Δpt [Pa]

    Total differential pressure

    Aeff [m²]

    Effective air discharge area


    All sound power levels are based on 1 pW.

    Downloads

    product information

    • Product data sheet Type QLV-90/QLV-180

      Product data sheet 2,6 MB pdf

    certificates

    • Declaration of hygiene conformity Type QLV

      QLV_HC_2024_05_DE_en Hygiene certificate 1,2 MB pdf

    • Non-CE Manufacturer's statement QLV

      QLV_NotCE_2022_02_08_14_36_21_DE_en Certificate 1,3 MB pdf
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