Linear slot diffusers BUREAU VERITAS Certification

Technical data. Selection tables 9 Technical data. Selection graphs 11 Technical data. Selection tables 28 Technical data. Selection graphs 29

Linear slot diffuser LK-70 Description LK-70 linear supply diffuser for variable or constant flow rate, specially designed to maintain the ceiling or Coanda effect, including primary air flow rates reduced to 20% of the nominal flow rate. This diffuser made with aluminium frames has a 15-mm air passage, providing greater aesthetic appeal. Finished products Standard finished products are constructed of natural anodised aluminium or precoated with RAL-9010 gloss white. The directional blades can be adjusted by means of a drive wheel, which allows the air to be aimed in different directions up to...

LK-70 with FIXED plenum without damper O Plenum with 1 spigot Plenum with 2 spigots LK-70 with REMOVABLE plenum without damper Plenum with 1 spigot G (OPENING) Plenum with 2 spigots

Ausführungen und Abmessungen LK-70 with FIXED plenum, with adjustable damper from the room OPENING= Plenum with 1 spigot G (OPENING) Plenum with 2 spigots Plenum box insulation by special order LK-70 with REMOVABLE plenum, with adjustable damper from the room Plenum with 1 spigot G (OPENING) Plenum with 2 spigots Plenum box insulation by special order

Models and dimensions LK-70 / LK-70-S LK-70-S, linear supply diffuser with narrow outer frames of 12 mm. Technical data similar to LK-70. FROM ACTIVE LENGTH >=1200 mm: 2 SPIGOTS

Models and dimensions LK-70-L The linear wall diffuser model LK-70-L is specially designed for installation in continuous surface walls because it requires little space. It generates a flow of turbulent mixing air, being suitable for ranges of up to 5 m and installation heights of 2.5 to 3.5 m. To obtain an adherent vein with cold air, it is advisable not to exceed the installation distances of the diffuser with respect to the ceiling h <300 mm. If the plenum is equipped with acoustic insulation, there is no need for a silencer to avoid crosstalk. The linear wall diffuser is available for air...

Models and dimensions SLOTS

LK-70 Technical data. Selection tables LK-70 / LK-70-S LK - 70 VERTICAL DISCHARGE

LK-70Technical data. Selection graphs LK-70 / LK-70-S Graph 1. SOUND LEVEL, HORIZONTAL DISCHARGE L = Nominal length of diffuser (active length)

LK-70 Technical data. Selection graphs LK-70 / LK-70-S Graph 2. SOUND LEVEL, VERTICAL DISCHARGE L = Nominal length of diffuser (active length)

Technical data. Selection graphs LK-70 / LK-70-S

Technical data. Selection graphs LK-70 / LK-70-S Graph 4. VERTICAL DISCHARGE

Technical data. Selection graphs LK-70 / LK-70-S Graph 5. AIR STREAM BETWEEN DIFFUSERS Distance between diffuser axes (m) Height from ceiling to occupied area (m) Velocity at a distance hR from the ceiling below the point where air jets meet (m/s)

Technical data. Selection graphs LK-70 / LK-70-S Graph 6. AIR STREAM TOWARD THE WALL Horizontal distance from diffuser to wall + hR Velocity at the wall, at a distance hR from the ceiling

Technical data. Selection graphs LK-70 / LK-70-S Graph 7. TEMPERATURE, HORIZONTAL DISCHARGE Temperature difference between supply and ambient air. Temperature difference between air jet (for throw X) and ambient ai

Technical data. Selection graphs LK-70 / LK-70-S Graph 8. TEMPERATURE, VERTICAL DISCHARGE

Technical data. Selection graphs LK-70 / LK-70-S Graph 9. INDUCTION RATE, HORIZONTAL DISCHARGE Induction rate. Quotient between the air volume moved by the air jet for a throw X and the supply air volume.

Technical data. Selection graphs LK-70 / LK-70-S Graph 10. INDUCTION RATE, VERTICAL DISCHARGE

Selection examples Example 1. Horizontal Air Supply The selection of an LK-70 linear diffuser is planned with the following design input: •Flow rate: 145 m3/h •Sound power < 35 dB(A) •Ceiling height: 3 m •Distance from the diffuser to the wall is 2.8 m •Distance between the diffusers (in the direction of the air supply): 5 m Starting with Graph 1 with a flow rate of 145 m3/h, we see that the sound power is 35 dB(A) for an LK 70 1500 – 1-slot linear diffuser, with a drop in pressure of 14 Pa. In order to obtain the effective velocity (Vk), we must first know the effective area of the diffuser...

LK-70 Selection examples Example 2. Vertical Air Supply An LK-70 linear diffuser is selected based on the following design input data: •Flow rate: 330 m3/h •Sound power < 35 dB(A) •Maximum vertical penetration: 3 m •AT = +6 K Starting with Graph 4 with a flow rate of 330 m3/h we observe that, for a size 1000 three-slots LK-70 diffuser and a AT = +6 K, we obtain a maximum penetration of Ymax = 3 m. In order to obtain the sound output level and the drop in pressure for the selected diffuser, we need to look at Graph 2 with an air flow rate of 330 m3/h. We obtain a sound power level of 33 dB(A)...

LK-70Product code The product code shown below is used to define both the diffuser as well as the plenum: Example: LK-70-1-1200-PFA-C RAL 9010 LK-70 linear diffuser, one-slot, and nominal width 1200 mm, 2 lengths of blades (standard), with insulated fixed plenum and integrated regulating damper in the spigot, coated in RAL-9010 white. LK-70-S Linear diffuser of narrow outer frame LK-70-MULTI Linear diffuser with slats of minimum length 100 mm LK-70-L Linear wall diffuser --- length of the diffuser (nominal, opening in mm) — no. of STANDARD lengths of deflector blades A no. of spans...

Linear slot diffuser integrated into a circular duct LK-70-C Description Supply linear slot diffuser, model LK-70-C, suitable for variable and constant volume. Integrated into a circular duct this diffuser frames has a 17-mm air passage, providing greater aesthetic appeal. The diffuser is suitable for large airflows at low velocities into the occupied zone. Recommended installation height between 2.5 and 4m. Finished products Standard finished products are made in galvanised sheet steel or painted in RAL-9010 gloss white equipped with adjustable blades manufactured in aluminium extrusion. The...