Type QLV
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Displacement flow diffusers for installation on a wall Type 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 QLV-180 ■■ 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 i

Displacement flow diffusers for installation on a wall General information Page General information Function Technical data Quick sizing Specification text Order code Variants Accessories Dimensions and weight Installation details Basic information and nomenclature 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...

Displacement flow diffusers for installation on a wall 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...

Displacement flow diffusers for installation on a wall Schematic illustration of QLV-180 with circular spigot at the top 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 Low-turbulence displacement ventilation airflow pattern Three-dimensional representation Low-turbulence displacement ventilatio

Displacement flow diffusers for installation on a wall Technical data Nominal sizes Minimum volume flow rate, at 0.1 m/s Maximum volume flow rate, at 0.3 m/s Supply air to room air temperature difference Sound power level, at 0.3 m/s

Displacement flow diffusers for installation on a wall Quick sizing Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures. QLV-90, height 500 – 800, sound power level, total differential pressure and near zone Nominal size Damper blade position <: 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 installation on a wall Quick sizing QLV-90, height 1000 – 1250, sound power level, total differential pressure and near zone Nominal size Damper blade position <: 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 installation on a wall Quick sizing QLV-90, height 1500 – 1750, sound power level, total differential pressure and near zone Nominal size Damper blade position <: 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, height 500 – 600, sound power level, total differential pressure and near zone Nominal size Damper blade position <: 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 installation on a wall Quick sizing QLV-180, height 800 – 1000, sound power level, total differential pressure and near zone Nominal size Damper blade position <: 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 installation on a wall Quick sizing QLV-180, height 1250 – 1750, sound power level, total differential pressure and near zone Nominal size Damper blade position <: 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 installation on a wall Specification text This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme. 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...

Displacement flow diffusers for installation on a wall Order code  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...

Displacement flow diffusers for installation on a wall

Displacement flow diffusers for installation on a wall Wall fixing ① Wall mount, inner part

Displacement flow diffusers for installation on a wall The nominal size (nominal width × nominal height) is equal to the discharge opening. QLV-90-U QLV-90-U always with lip seal