KFD-KLD Linear slot diffusers

Contents Linear slot diffusers KFD 2 Linear slot diffusers KLD 8 Linear slot diffusers KLD-Slim 14 Square diffusers KLD-Q 16 Selection tables KLD-Q 17 Linear slot diffusers KLD-Q-PANEL 19 Selection tables KLD-Q-PANEL 20 Square diffusers KLD-Q-I/R 22 Square diffusers KLD-Q-Flash 23

KFD linear slot diffusers Description KFD model, linear slot diffuser for variable and constant volume designed especially to maintain the ceiling effect (Coanda effect) even with primary air flows reduced to 20% of the nominal flow. Complete with adjustable directional blades, with closing thermal fuses which close the air output when the air temperature exceeds 70° C. Finishes Extruded aluminium profiles, pre-lacquered in RAL-9010 white. Directional blades in black. Special finishes available upon request. Description KFD-P WITH PLENUM The KFD-P model is a diffuser with a fixed plenum box manufactured...

Diffuser selection DV Selection For a specific air flow, selection must take the noise level O and the throw for the desired terminal velocity into consideration. The throws (X) which are shown in TABLE MM Con 1 correspond to a maximum velocity of 0.25 m/s in the MM Para MM occupied zone. The selection table is for diffusers with ALL THE SLOTS SUPPLYING AIR IN THE SAME DIRECTION. When selection requires supply in TWO directions, the air flow has to be separated and selected using that which corresponds to each direction. For a diffuser measuring 1200 mm in length and with 4 slots supplying a...

KFD diffuser selection table KFD Q Air flow measurement The air flow qv, shall be obtained by multiplying the effective area of the diffuser (A|<) in m2, by the effective velocity at outlet (V<), measured with a type hot-wire anemometer TSI- VELOCICALC located on the exterior side frame. Different measurements must be taken along the perimeter of the diffuser to obtain an average value. The greater the number of measurements, the more accurate the measurement obtained will be.

Correction factors Induction rate 1) Throw correction factor for room width/length ratio Ca. This factor is given by the division of the room width minus diffuser length and room length. It is applicable to diffusers with lateral discharge only. For diffusers with vertical discharge Ca equals 1, since they were tested in a square room (A/L = 1). Once the throw is known, X or Xc , it is possible to determine the induction coefficient on the graph. For the example on page 5, and as there are no correction factors Ca and Ch , the induction coefficient (qx /qo ) when the diffuser supplies the whole...

KFD diffuser with fixed plenum box Extruded aluminium linear diffuser with galvanized steel plenum box. When supplied, the plenum box(fixed or removable) is screwed to the diffuser. The top of the plenum box has lugs so it can be fixed to the ceiling. Said lugs are not folded to make transportation easier and must be shaped during on-site assembly. Duct inlets The plenum inlet spigots are standardized according to ISO standards and enable connection of both flexible and rigid ducts. A damper to manually regulate the air flow, which is useful in constant air volumens, can be installed on request....

Connection system and blade unblocking Connection system When the diffusers are longer than 2000 mm, they come in separate sections. The sections are connected lengthwise by using pins located on the exterior profiles, as its show in fig. attached. The pins are fixed under pressure. Alignment Perfect alignment, both vertically and in a straight-line, is achieved by combining the regulation of the plenum box suspension system and joining the different sections of the diffuser using the pins which must be inserted as far as they will go. Blade unblocking In order to immobilize the adjustable blades...

KLD linear slot diffusers for primary and secondary air flow Description KLD model, linear slot diffuser for variable and constant air flow designed especially to maintain the ceiling effect (Coanda effect) even with primary air flows reduced to 20% of the nominal flow. Fixed directional blades. KLD Finishes Extruded aluminium profiles pre-lacquered in white. RAL-9010. Special finishes upon request. Description KLD-P WITH PLENUM The KLD-P model is a diffuser with a fix plenum box manufactured in galvanised steel. Plenum boxes can be manufactured with thermo-acoustic insulation upon request. Utilisation...

Diffuser selection Selection For a specific air flow, selection must take the noise level and the throw for the desired terminal velocity into consideration. The throws which appear in TABLE 2 correspond to a maximum velocity of 0.25 m/s in the occupied zone. Required specifications: Air flow rate: _____________________________ 400 m3/h Throw: ________________________________ 4,5 to 5,5 m Required sound power level (maximum):_________40 dB(A) Required pressure drop (lower than): _____________ 20 Pa No. of slots: ____________________________________ 2 The selection table is for diffusers with...

KFD-KLD KLD diffuser selection table KLD Q Air flow measurement The air flow qv shall be obtained by multiplying the effective area of the diffuser (A|<) in m2, by the velocity at outlet (V<), measured with a TSI- VELOCICALC hot-wire anemometer located on the exterior side frame. Different measurements must be taken along the diffuser (at least 5) and an average taken to determine the velocity as accurately as possible.

KFD-KLDCorrection factors AT(°C) 1) Throw correction factor for room width/length ratio (Ca). This factor is given by the division of the room width minus diffuser length and room length. It is applicable to diffusers with lateral discharge only. For diffusers with vertical discharge Ca equals 1, since they were tested in a square room (A/L = 1). 2) Throw correction factor for distance of diffuser to ceiling (C ). For adherent jets, i.e. diffuser aligned with ceiling: Ch = 1. For free jets: Ch = 1,4 The corrected throw Xc is obtained by: Xc = X • Ca'- Ch 3) Maximum distance of diffuser to ceiling. To...