Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA

Transcription

1 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA Diffusers with perforated panels type PAKA, PBKA, PCKA, PDKA, PEKA can be used in public premises such as offices, hotels, hospitals, restaurants, conference halls etc. They are easy to install together with connection boxes SKHA that has duct connection placed horizontally or SKVA with inlet situated vertically. Duct connection is supplied with rubber gasket on it. Devices are mostly installed in the false ceiling but they might be also working as freely hanging diffusers. Each front panel has unique perforation design allowing user to direct air stream whenever is required. Maximum temperature difference between supply and indoor air Dtp ±K. Recommended mounting height above the floor,,m. The diffuser is painted in RAL 90 colour as a standard. Other colours are available on request. Product facts Square perforated diffuser PAKA, PBKA,PCKA, PDKA, PEKA Intended for ceiling installation Two connection alternatives for connection boxes Suitable for both supply and exhaust of air Broad flow range Can be supplied in many RAL colours on request Product code example: Perforated diffuser PBKA--0- Terminal of size, three-way, painted in RAL 90 colour. Connection box SKHA---0- to fit diffuser size, uninsulated, horizontal spigot equipped with blade damper. Fläkt Woods PLBOV 0.0

2 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Supply air device, pressure drop PAKA diffuser installation alternative - connection box SKHA SKHA P [ Pa ] SKHA--0 SKHA--0 SKHA-0-0 SKHA-0-0 SKHA--0/ 0 db(a) db(a) 0 db(a) db(a) db(a) db(a) 0 db(a) PAKA diffuser installation alternative - connection box SKVA SKVA P [ Pa ] SKVA--0 SKVA--0 SKVA-0-0 SKVA-0-0 SKVA--0/ 0 db(a) db(a) 0 db(a) db(a) db(a) db(a) 0 db(a) In the above graph the sound levels are indicated in db(a) for a reference room with m room absorption, equivalent to db room attenuation. Dashed line represents the airflow range where the velocity on the connection box inlet exceeds m/s. 90 Fläkt Woods PLBOV 0.0

3 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Supply air device, throw length Throw length - face panel size 0 x 0 9 0, PEKA PCKA, PDKA PB KA PAKA Throw length - face panel size 0 x 0 9 0, PEKA PCKA, PDKA PBKA PAKA Fläkt Woods PLBOV 0.0

4 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Supply air device, throw length, pressure drop calculation Throw length - face panel size 0 x 0 9 0, PEKA PCKA, PDKA PBKA PAKA L 0, throw of isothermal airflow, [m] L zone length, [m] Pressure drop calculation Pressure drops given on all graphs based on PAKA four way diffusion pattern. In panels with other diffusion pattern the pressure drop and acoustic power level values read from graph must be corrected with multipliers shown in the table below: Face panel Correction factors "m" (multipliers) for pressure drop calculation DP PBKA, PCKA, PDKA, PEKA = DP PAKA x m Inlet size (mm) Increasing of acoustic pressure level [db(a)] PBKA x.0 x. x. + PCKA x. x. x. + PDKA x. x. x. + PEKA x.0 x.0 x.0 + Fläkt Woods PLBOV 0.0

5 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Exhaust air device, pressure drop PAKA diffuser installation alternative - connection box SKHA SKHA 0 0 P [ Pa ] 0 0 SKHA--0 SKHA--0 SKHA-0-0 SKHA-0-0 SKHA--0/ db(a) 0 db(a) db(a) db(a) db(a) 0 db(a) PAKA diffuser installation alternative - connection box SKVA SKVA 0 0 P [ Pa ] 0 0 SKVA --0 SKVA --0 SKVA -0-0 SKVA -0-0 SKVA --0/ 0 db(a) db(a) db(a) db(a) 0 db(a) db(a) In the above graph the sound levels are indicated in db(a) for a reference room with m room absorption, equivalent to db room attenuation. Dashed line represents the airflow range where the velocity on the connection box inlet exceeds m/s. Fläkt Woods PLBOV 0.0

6 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Sound data, definitions Sound power level Supply air device Correction of sound level K oct in db for octave bands, (Hz) Exhaust air device Correction of sound level K oct in db for octave bands, (Hz) Sound attenuation Supply air device with insulated connection box Sound attenuation in db for octave bands, (Hz) Exhaust air device with insulated connection box Sound attenuation in db for octave bands, (Hz) The sound power levels for different octave bands are obtained by adding together the sound pressure level L A, in db(a), and the corrections K oct for the octave bands in the table with the help of the following formula: L W = L A + K oct Correction K oct is the mean value for the range of application of PAKA. Definitions q air flow l/s, m /h p t total pressure drop Pa L 0 throw m L A sound pressure level with a room attenuation of db ( m room absorption area) db(a) L W sound power level db K oct octave band correction db L sound attenuation from the duct to the room db Fläkt Woods PLBOV 0.0

7 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page 9 Dimensions Face panels Nominal size A (mm) A A Diffusion pattern PAKA PBKA PCKA four - way three - way two - way PDKA PEKA two - way one - way Fläkt Woods PLBOV 0.0

8 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page 0 Dimensions SKHA connection box DxD F M DN B AxA DN A B D F M All dimensions are indicated in mm. SKVA connection box DxD DN F AxA DN A D F All dimensions are indicated in mm. Fläkt Woods PLBOV 0.0

9 Perforated diffuser PAKA, PBKA, PCKA, PDKA, PEKA TECHNICAL DATA - 0 page Airflow measurement, descriptive text, product code Airflow measurement In order to measure airflow going through perforated panel, one should take a measure of overpressure Dp m [Pa] on the connection box spigot and multiply it by relevant k factor value. Descriptive text Square perforated diffuser PAKA for ceiling installation manu fac tured by Fläkt Woods. Product code Square perforated diffuser P(A,B,C,D,E)KA-aa-0-c q = k p m (l/s) (Pa) q =,k p m (m /h) (Pa) 0, 0, 0, k - factors Diffuser and connection box size PAKA PBKA PCKA, PDKA PEKA SKHA--0 SKHA SKHA SKHA SKHA--0 SKHA-- SKVA--0 SKVA--0 SKVA-0-0 SKVA-0-0 SKVA--0 0 SKVA-- 0 Colour = standard RAL 90 X = any other colour from RAL palette Connection box (horizontal inlet) -0, -0, 0-0, 0-0, -0, - (duct connection size - diffuser size) Type 0 = uninsulated = insulated SKHA-aa-bb-c-d Damper 0 = without = blade damper = measurement and adjustment damper ZAED Connection box (vertical inlet) SKVA-aa-bb-c-0-0, -0, 0-0, 0-0, -0, - (duct connection size - diffuser size) Type 0 = uninsulated = insulated Fläkt Woods PLBOV 0.0 9

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