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VWR-N (RAL9005) • Black square swirl diffusers with fixed blades

Swirl diffusers
Square
Steel
Black, RAL 9005
Fixed blades

Accessories

RER-LB • Circular plenum boxes RER-LB ISO • Insulated circular plenum boxes CRC • Circular regulating valves for plenum boxes

Datasheet

Square swirl ceiling diffusers with fixed blades

Brand

Cairox

Application

For air supply and exhaust in ventilation and air conditioning systems

Material

Steel

Colour

Colour black, RAL 9005
Other colours available upon request

Composition

Fixed blades

Mounting

Fixing with central screw into the crossbar of the plenum box

Accessories

Plenum box, type RER-LB
Insulated plenum box, type RER-LB ISO
Regulating valve for plenum box, type CRC
Mounting crossbar for direct duct mounting, type FGN
Mounting crossbar for direct ceiling mounting, type FHN

Text for tender

The square air supply diffusers are of the swirl type with fixed blades. They are made of steel with black powder coating RAL 9005 and supplied with a volume control damper in the plenum box.
Cairox type VWR-N (RAL9005) +RER-L

Order example

VWR-N (RAL9005), 315 + RER-LB 315 + CRC 250

Explanation

VWR-N (RAL9005) = Diffuser type

315 = Diffuser size (Ø diffuser neck connection)

Accessories

RER-LB = Plenum box

CRC = Regulating valve for plenum box
250 = Plenum box connection diameter

Dimensions

VWR-N	A [mm]	ØD1 [mm]	#Blades
125	171	123	8
160	213	158	10
200	264	198	12
250	326	248	14
315	404	313	16
355	448	353	17
400	500	398	18
500	596	498	20

Quick selection

VWR-N				125			160			200			250			315			355			400			500
Q	Ak			0.0099			0.0123			0.0176			0.0226			0.033			0.0359			0.05			0.0618
	B			1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6
50		H=	2.7	0.08	0.05	0.04
	Vz	H=	3.2	0.06	0.04	0.04
		H=	3.8	0.04	0.04	0.03
	Vk			1.4
	X0.25			0.5
	Ps			11
	Lw(A)			<20
100		H=	2.7	0.15	0.11	0.08	0.14	0.1	0.08	0.11	0.08	0.06
	Vz	H=	3.2	0.11	0.09	0.07	0.1	0.08	0.06	0.09	0.07	0.05
		H=	3.8	0.09	0.07	0.06	0.08	0.06	0.05	0.07	0.05	0.05
	Vk			2.8			2.3			1.6
	X0.25			0.9			0.8			0.7
	Ps			45			19			6
	Lw(A)			35			26			<20
150		H=	2.7	0.23	0.16	0.13	0.21	0.15	0.11	0.17	0.12	0.1	0.15	0.11	0.08
	Vz	H=	3.2	0.17	0.13	0.11	0.15	0.12	0.1	0.13	0.1	0.08	0.11	0.09	0.07
		H=	3.8	0.13	0.11	0.09	0.12	0.1	0.08	0.1	0.08	0.07	0.09	0.07	0.06
	Vk			4.2			3.4			2.4			1.8
	X0.25			1.4			1.2			1			0.9
	Ps			100			41			14			5
	Lw(A)			46			38			24			<20
200		H=	2.7	0.31	0.22	0.17	0.27	0.2	0.15	0.23	0.16	0.13	0.2	0.14	0.11	0.17	0.12	0.09	0.18	0.13	0.1
	Vz	H=	3.2	0.23	0.18	0.14	0.21	0.16	0.13	0.17	0.13	0.11	0.15	0.12	0.09	0.13	0.1	0.08	0.13	0.1	0.08
		H=	3.8	0.18	0.14	0.12	0.16	0.13	0.11	0.13	0.11	0.09	0.12	0.09	0.08	0.1	0.08	0.07	0.1	0.08	0.07
	Vk			5.6			4.5			3.2			2.5			1.7			1.5
	X0.25			1.8			1.6			1.4			1.2			1			1.1
	Ps			178			72			25			9			3			2
	Lw(A)			54			46			32			22			<20			<20
300		H=	2.7							0.34	0.25	0.19	0.3	0.22	0.17	0.25	0.18	0.14	0.27	0.19	0.15	0.23	0.16	0.13
	Vz	H=	3.2							0.26	0.2	0.16	0.23	0.17	0.14	0.19	0.14	0.12	0.2	0.16	0.13	0.17	0.13	0.11
		H=	3.8							0.2	0.16	0.14	0.17	0.14	0.12	0.14	0.12	0.1	0.16	0.13	0.11	0.13	0.11	0.09
	Vk									4.7			3.7			2.5			2.3			1.7
	X0.25									2.1			1.8			1.5			1.6			1.4
	Ps									54			20			6			4			2
	Lw(A)									43			33			<20			<20			<20
400		H=	2.7										0.4	0.29	0.22	0.33	0.24	0.19	0.36	0.26	0.2	0.3	0.22	0.17	0.24	0.17	0.13
	Vz	H=	3.2										0.3	0.23	0.19	0.25	0.19	0.16	0.27	0.21	0.17	0.23	0.18	0.14	0.18	0.14	0.11
		H=	3.8										0.23	0.19	0.16	0.19	0.16	0.13	0.21	0.17	0.14	0.18	0.14	0.12	0.14	0.11	0.09
	Vk												4.9			3.4			3.1			2.2			1.8
	X0.25												2.4			2			2.2			1.8			1.4
	Ps												35			12			8			4			3
	Lw(A)												41			27			23			<20			<20
500		H=	2.7													0.42	0.3	0.23	0.45	0.32	0.25	0.38	0.27	0.21	0.29	0.21	0.16
	Vz	H=	3.2													0.31	0.24	0.2	0.34	0.26	0.21	0.29	0.22	0.18	0.22	0.17	0.14
		H=	3.8													0.24	0.2	0.16	0.26	0.21	0.18	0.22	0.18	0.15	0.17	0.14	0.12
	Vk															4.2			3.9			2.8			2.2
	X0.25															2.5			2.7			2.3			1.8
	Ps															18			13			7			4
	Lw(A)															33			30			<20			<20
600		H=	2.7													0.5	0.36	0.28	0.54	0.39	0.3	0.46	0.33	0.25	0.35	0.25	0.2
	Vz	H=	3.2													0.38	0.29	0.24	0.4	0.31	0.25	0.34	0.26	0.21	0.27	0.2	0.17
		H=	3.8													0.29	0.24	0.2	0.31	0.25	0.21	0.26	0.21	0.18	0.2	0.17	0.14
	Vk															5.1			4.6			3.3			2.7
	X0.25															3			3.2			2.7			2.1
	Ps															26			18			9			6
	Lw(A)															38			35			22			<20
800		H=	2.7																			0.61	0.44	0.34	0.47	0.34	0.26
	Vz	H=	3.2																			0.46	0.35	0.29	0.35	0.27	0.22
		H=	3.8																			0.35	0.29	0.24	0.27	0.22	0.19
	Vk																					4.4			3.6
	X0.25																					3.7			2.8
	Ps																					16			11
	Lw(A)																					30			22
1000		H=	2.7																			0.76	0.54	0.42	0.59	0.42	0.33
	Vz	H=	3.2																			0.57	0.44	0.36	0.44	0.34	0.28
		H=	3.8																			0.44	0.36	0.3	0.34	0.28	0.23
	Vk																					5.6			4.5
	X0.25																					4.6			3.5
	Ps																					26			17
	Lw(A)																					36			28
1200		H=	2.7																						0.71	0.51	0.39
	Vz	H=	3.2																						0.53	0.41	0.33
		H=	3.8																						0.41	0.33	0.28
	Vk																								5.4
	X0.25																								4.2
	Ps																								24
	Lw(A)																								33

Symbols and specifications

Q = Air volume in m³/h
Ak = Effective surface (free area) in m²
B = Distance between the diffusers in m
H = Installation height of the diffusers in m
Vz = Maximum velocity at the occupied zone according to distance between the diffusers and installation height in m/s
Vk = Average effective velocity through the diffuser in m/s
X0.25 = Throw length in m at an end velocity Vt of 0,25m/s
Ps = Static pressure loss given in Pa
Lw(A) = Acoustic power in dB(A)

The throw X0.25 is given at an end velocity of 0.25m/s for a smooth ceiling without any obstacles.
The values are given for isothermal supply air. Throw distances for cooling conditions at -11K can be calculated by dividing the X0.25 values with factor 1.1. For heating purposes at Dt of +11K a multiplier of 1.1 should be applied to the given X0.25 value.
In order to achieve a high comfort level, selections can be made according to the maximal velocity at the occupied zone Vz. These values are given at distances between diffusers B and installation heights H. Velocities Vz lower than, or equal to 0,25m/s at the occupied zone are advised.
The pressure losses Ps are given for diffusers without damper of with fully opened damper.
The acoustic power values Lw(A) are given for diffusers without damper of with fully opened damper without room attenuation. Acoustic powers below 20dB(A) are mentioned as "<20" in the tables.
For all special requirements, please contact our engineering office.

Placement instruction

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	Introduction

A	Products for air diffusion

	A00	Basic principles for air diffusion

	A01	Wall and floor grilles

	A02	Grilles for galva ducts

	A03	Door and transfer grilles

	A04	Ceiling diffusers and grilles

	A05	Filter and return air grilles

	A06	Air valves

	A07	External louvres

	A08	Backdraught shutters

	A09	Roof caps

	A10	Grilles for domestic ventilation

	A11	Perforated induction ducts

	A12	Air displacement units

B	Valves & volume control dampers

C	Air duct systems

D	Air duct components and accessories

E	Fireproof products

F	Insulating products

G	Air filters

I	Fans & ventilation systems

J	Air handling, air conditioning and heatpumps


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