Diffusers | VVKR Swirl ceiling diffuser with adjustable deflectors Ordering codes Description VVKR- Type A B C Round front plate Square front plate R S Dimensions 300 - 825 Number of deflectors Deflectors 8 - 92 Black White without blades (extract air) Material / surface finish B W R AISI304 AISI316 RALxxx VVKR is a swirl ceiling diffuser with manually adjustable air guiding deflectors. It enables us to adjust the airflow pattern to individual requirements of the room at any time.
/ 18 | Diffusers Design Material used The diffuser can be supplied with a round or square front plate manufactured from galvanized steel. The surface is powder painted white RAL9010 as standard, or another RAL code can be specified. It is also possible to manufacture a stainless steel AISI304 or AISI316 version, without surface finish. The deflectors are made from plastic, available in black or white colour. In the middle of the diffuser there is a pre-punched hole for front plate screw fixing.
Diffusers | □A □A □A □A □A VVKR-A-S-XXX-16 VVKR-A-S-XXX-24 VVKR-A-S-XXX-32 VVKR-A-S-XXX-40 VVKR-A-S-XXX-48 □A □A □A øD øD øD VVKR-A-S-625-54 VVKR-A-S-800-72 VVKR-A-S-825-80 VVKR-A-R-XXX-8 VVKR-A-R-XXX-16 VVKR-A-R-XXX-24 øD øD øD øD øD øD VVKR-A-R-XXX-32 VVKR-A-R-XXX-40 VVKR-A-R-XXX-48 VVKR-A-R-625-54 VVKR-A-R-800-72 VVKR-A-R-825-80 □A □A □A □A □A VVKR-B-S-XXX-8 VVKR-B-S-XXX-16 VVKR-B-S-XXX-24 VVKR-B-S-XXX-40 VVKR-B-S-XXX-64 øD øD øD øD øD VVKR-B-R-XXX-8 VVK
/ 18 | Diffusers Dimensions øD □A Size Free area (mm) Type Size × Number of deflectors 296 298 400 396 398 500 496 498 300×8, 400×8, 500×8, 600×8, 625×8 0,00814 0,01714 600 596 598 400×16, 500×16, 600×16, 625×16 0,01628 0,03427 625 621 623 500×24, 600×24, 625×24 0,02443 0,05141 800 796 798 600×32, 625×32 0,03257 0,06854 825 821 823 600×40, 625×40 0,04071 0,08568 600×48, 625×48 0,04885 0,10282 625×54 0,05496 0,11567 825×80 0,08142 0,17136 800×72 0,08575
Diffusers | 8 16 24 32 36 40 48 54 64 72 80 92 • • • • • 300 400 500 600 625 800 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 825 825 825 800 825 800 625 625 600 625 600 625 600 500 625 600 625 600 500 625 600 500 400 625 600 500 400 Plenum box size 300 Diffuser size Number of deflectors • • • • • • Legend Tab.
/ 18 | Diffusers Technical parameters Terminology Lt Legend A, B Lt Y qV; ΔT0 qV; ΔT0 VLt; ΔTL VH1, ΔTL H0 = 1,8 m H H1 VLt; ΔTL Fig.
Diffusers | Pressure drop ΔPt (Pa) 50 45 40 35 (A ) 5 700 VH1 (m • s-1) 50 45 40 ) 35 L W 30 25 50 VH1 (m • s-1) 45 ) 0,10 L 400 600 1000 30 (A 25 LW dB ) 20 600 qv 800 1000 (m3 • h-1) H=V VH1 (m • s-1) 15 10 8 6 dB ( 35 20 A) 40 30 400 3 4 5 6 (m) VVKR - A - 600 × 32, 625 × 32 (m) H1 = 0,9 1,2 1,6 2 50 H=V 45 40 4 3 200 1,5 2 Distance A or B (m3 • h-1) W 35 0,8 1 2000 L 20 0,15 0,60 0,50 0,40 0 40 0,30 0,25 0,20 20 30 Pressure drop ΔPt (Pa) 45
| Diffusers Pressure drop & sound power level of the supply air Pressure drop & sound power level of the extract air VVKR - A - 600 × 40 30 25 LW 20 600 800 1000 1200 qv 700 1000 VH1 (m • s-1) 50 45 A) 40 dB ( VH1 (m • s-1) 50 ) 45 dB (A 40 35 L 600 0,15 1000 0,8 1 2000 30 ( L dB W 800 1000 500 700 20 qv 1500 2000 (m3 • h-1) VH1 (m • s-1) 50 45 ) dB (A 40 W 0,50 0,20 5000 H=V -1 H=V 0,8 1 1,5 2 VVKR - A - 825 × 80, 800 × 72 H1 = 1,2 1,6 2 2,5 10 8 6 4 3 200
Diffusers | Pressure drop ΔPt (Pa) 50 45 40 35 (A ) 30 dB L W 25 20 5 4 LW 25 400 500 600 700 1000 50 VH1 (m • s-1) 45 40 (A ) 35 30 W 10 8 6 200 400 ) 600 1000 LW 20 (A dB ) 500 600 700 800 qv 1000 1200 (m3 • h-1) ) dB (A 1,5 2 3 Distance A or B VVKR - B - 600 × 40 H1 = 0,9 1,2 1,6 2 VH1 (m • s-1) 50 10 8 6 4 3 200 H=V 45 15 0,8 1 4 5 6 (m) (m) 0,60 0,50 0,40 W 30 25 30 20 0,15 2000 L 35 20 40 40 45 H=V 35 40 30 0,40 (m3 • h-1) 30 V 50 50
| Diffusers Pressure drop & sound power level of the supply air VVKR - B - 800 × 64, 825 × 64 LW 30 dB LW 400 500 600 700 qv LW 400 ( dB A) 500 600 700 800 qv 1000 1200 (m3 • h-1) VH1 (m • s-1) 50 45 ) dB (A 40 L W 35 50 45 40 35 0,50 0,40 W 30 0,60 400 L 600 1000 50 45 30 15 10 8 6 4 3 200 -1 H=V 0,8 1 1,5 2 3 Distance A or B (m • h ) 40 20 0,15 2000 3 4 5 6 (m) VVKR - C - 500 × 36, 600 × 36, 625 × 36 (m) H1 = 0,9 1,2 1,6 2 0,60 0,50 0,40 W 30 (m) VVKR - C
Diffusers | Pressure drop & sound power level of the supply air Pressure drop & sound power level of the extract air VVKR - C - 600 × 48, 625 × 48 VVKR - C - 600 × 48, 625 × 48 30 20 d LW 800 1000 500 700 qv 4 3 200 1500 VH1 (m • s-1) 50 45 ) dB (A 2000 25 VH1 (m • s-1) 50 45 15 1,6 2 0,60 0,50 0,40 0,30 dB 0,25 W (A ) 10 8 6 0,20 L Pressure drop ΔPt (Pa) 50 45 ) W dB (A 40 L 35 30 20 0 30 400 600 1000 qv (m3 • h-1) (m) 40 4 3 200 1500 2000 2500 3000 qv 2,5 (m
/ 18 | Diffusers Swirl Diffuser VVKR Calculation and Design Example Given parameters: Room dimensions: Width: 18,0 m Length: 24,0 m Height: 3,65 m Air exchange in the room: i = 12 times Room temperature: T = 24 °C Temperature differential between the room air temperature and the supply air temperature ΔT0 = -8 K Average air flow velocity between two diffusers at distance H1, vH1 < 0,2 m•s-1 Requested sound power level LWA < 30 dB(A) Requested parameters: 1. QV - supply air flow volume into the room 2.
Diffusers | 13 / 18 Calculation of vH1 and ΔTL for a swirl diffuser at basic deflector configuration Flow length between the occupied zone and the ceiling H1 = H - H0 (Obr. 7) H1 = 3,65 - 1,8 = 1,85 m Distance between two anemostats A=B=3m Diagram 2 for VVKR-A-600×40 with a horizontal connection, at qv = 540 m3 • h-1, A = 3 m and distance H1 = 1,85 m shows: 1.
/ 18 | Diffusers Accessories PB-VVK Plenum box The PB-VVK is produced in 2 types of shapes round (PB-VVK-R) or square (PB-VVK-S), with a horizontal or a vertical connection and with internal or external insulation. The plenum box is made of galvanized sheet as a standard.
Diffusers | Plenum box selection diagram ød PB-VVK-R (for round diffusers) PB-VVK-S (for square diffusers) Side connection Top connection Side connection D1 D2 D1 D1 D2 D1 D2 Mesh screen • — • • — • • Internal insulation I2 • • • • • • • External insulation J • • • • • • • H2 Top connection 77 H1 ød 50 15 50 15 / 18 øD øD øD + 11 øD + 11 Fig. 9: Main dimensions of the PB-VVK-R Size øD H1 H2 (horiz.) (vert.) m ød horiz. (mm) vert.
/ 18 | Diffusers PB-VVKU Universal plenum box K1 ød1 60 H K4 40 The PB-VVKU is a universal box which is possible to use for installation on various types of air terminal devices. The PB-VVKU is manufactured from galvanized sheet. Upon customer’s request it is possible to apply a powderpaint RAL surface finish. The box is optimized for use with both horizontal and vertical connection. When in storage, the PB-VVKU provides the advantage of stacking, thus saving storage space.
Diffusers | 17 / 18 Mounting The VVKR swirl diffuser is most commonly installed onto a ventilation duct as illustrated on Fig. 12. The mounting consists of installing the plenum box to the ceiling using draw-bars and mounting the diffuser face onto the plenum box using a centric screw which is included in the delivery. Fig. 12 depicts various methods of installing the VVKR onto the ceiling. When mounted into a suspended grid ceiling the supply air swirl is expected to be partially reduced.
Diffusers | 18 / 18 Diffusers - Related products VVKN Swirl diffusers with fixed deflectors Information about the product is in the technical documentation TPI-31. VVT Swirl diffusers with thermostatic control TPI-19 Systemair 10 / 2013 Information about the product is in the technical documentation TPI-41.
