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(PS/) SNC-1A (RAL9016) • Square nozzle diffusers with circular pattern

Multinozzle diffusers
Square
Steel and plastics
White, RAL 9016
Adjustable

Accessories

REV-B • Square plenum boxes REV-B ISO • Square insulated plenum boxes RER-B • Circular plenum box RER-B ISO • Insulated circular plenumbox CRC • Circular regulating valves for plenum boxes PPS-P • Polystyrene plenum box PPS-APD • Duct connections for insulated PPS plenum box & plate PPS-CRC • Regulating valve for PPS-APD PPS-H • Galvanized central hanger for PPS-P plenum PPS-MB • Central mounting bar for PPS-P

Datasheet

Multinozzle ceiling diffusers with high induction rate, consisting of a square plate with individual adjustable nozzles arranged in a circular pattern and to be equipped with galvanized steel plenumbox (PS/SNC-1A = SNC-1A diffuser in plate 596 x 596)

Brand

Cairox

Application

For air supply and exhaust in ventilation and air conditioning systems.

Material

Steel and plastic composite combination

Colour

Standard colour white, RAL 9016
Nozzles and diffuser available in RAL 9016 / 9010 / 9006 / 9005

Composition

Frontplate made of powder coated steel
Nozzles made out op plastic composite
Central screw mounting

Mounting

Fixing by central screw in the crossbar of the plenum box.

Accessories

Polystyrene plenum box, type PPS-P with duct connection PPS-APD and mounting bar PPS-MB
Circular plenum box, type RER-B
Square plenum box, type REV-B
Circular insulated plenum box, type RER-B ISO
Square insulated plenum box, type REV-B ISO
Regulating valve for plenum box, type CRC

Text for tender

The air supply ceiling diffusers are square with a circular arranged nozzlepattern. They are made of a steel powdercoated frontplate in white finish RAL 9016 and nozzles in plastic composite materials. The diffusers are standard delivered with galvanized steel plenumbox equipped with perforated plate and damper in the side entry spigot. The diffuser is centrally screw mounted.
Cairox type SNC-1A + RER-A

Order example

SNC-1A, 600 + RER-B 600 + CRC 250

Explanation

SNC-1A = Diffuser type

600 = Diffuser size

Accessories

RER-B = Circular plenum box

600 = Size plenum box

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

Dimensions

	AxA [mm]	# Nozzles
SNC-1A 300	296x296	22
SNC-1A 400	396x396	42
SNC-1A 500	496x496	68
SNC-1A 600	596x596	100
SNC-1A 625*	621x621	100
PS/SNC-1A 300/596	596x596	22
PS/SNC-1A 400/596	596x596	42
PS/SNC-1A 500/596	596x596	68
* niet meer verkrijgbaar / n'est plus disponible / no longer available

Quick selection

SNC 1A - #Nozzles				300 - #22			400 - #42			500 - #68			600 - #100 / 625* - #100
Q	Ak			0.0057			0.0114			0.0153			0.0258
	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
50		H=	2.7	0.3	0.12	0.06	0.25	0.1	0.05
	Vz	H=	3.2	0.14	0.07	0.04	0.12	0.06	0.03
		H=	3.8	0.07	0.04	0.02	0.06	0.03	0.02
	Vk			2.4			1.2
	X0,25			1.6			1.5
	Ps			6			2
	Lw(A)			24			<20
75		H=	2.7	0.42	0.19	0.11	0.34	0.15	0.08	0.32	0.14	0.08
	Vz	H=	3.2	0.22	0.12	0.07	0.17	0.09	0.06	0.16	0.08	0.05
		H=	3.8	0.12	0.07	0.05	0.09	0.06	0.04	0.08	0.05	0.03
	Vk			3.7			1.8			1.4
	X0,25			1.8			1.7			1.6
	Ps			13			4			2
	Lw(A)			33			<20			<20
100		H=	2.7	0.53	0.27	0.16	0.42	0.2	0.12	0.38	0.18	0.1	0.3	0.13	0.07
	Vz	H=	3.2	0.29	0.17	0.11	0.22	0.13	0.08	0.2	0.11	0.07	0.15	0.08	0.05
		H=	3.8	0.17	0.11	0.08	0.13	0.08	0.05	0.11	0.07	0.05	0.08	0.05	0.03
	Vk			4.9			2.4			1.8			1.1
	X0,25			2.1			1.9			1.8			1.6
	Ps			24			7			4			2
	Lw(A)			38			23			<20			<20
150		H=	2.7				0.58	0.3	0.19	0.51	0.26	0.16	0.39	0.18	0.11
	Vz	H=	3.2				0.33	0.2	0.14	0.29	0.17	0.11	0.21	0.12	0.07
		H=	3.8				0.2	0.14	0.1	0.17	0.11	0.08	0.12	0.07	0.05
	Vk						3.7			2.7			1.6
	X0,25						2.3			2.1			1.8
	Ps						16			9			3
	Lw(A)						33			27			<20
200		H=	2.7				0.71	0.4	0.26	0.63	0.34	0.22	0.49	0.25	0.15
	Vz	H=	3.2				0.43	0.28	0.19	0.37	0.23	0.16	0.27	0.16	0.11
		H=	3.8				0.28	0.19	0.14	0.23	0.16	0.12	0.16	0.11	0.08
	Vk						4.9			3.6			2.2
	X0,25						2.7			2.4			2
	Ps						28			16			6
	Lw(A)						40			34			23
250		H=	2.7							0.74	0.42	0.28	0.57	0.3	0.19
	Vz	H=	3.2							0.46	0.3	0.21	0.33	0.2	0.14
		H=	3.8							0.3	0.21	0.16	0.2	0.14	0.1
	Vk									4.5			2.7
	X0,25									2.8			2.3
	Ps									25			9
	Lw(A)									40			28
300		H=	2.7							0.85	0.5	0.34	0.64	0.35	0.23
	Vz	H=	3.2							0.54	0.36	0.26	0.39	0.24	0.17
		H=	3.8							0.36	0.26	0.2	0.24	0.17	0.12
	Vk									5.4			3.2
	X0,25									3.2			2.5
	Ps									35			13
	Lw(A)									45			33
350		H=	2.7										0.73	0.42	0.27
	Vz	H=	3.2										0.45	0.29	0.21
		H=	3.8										0.29	0.21	0.16
	Vk												3.8
	X0,25												2.8
	Ps												18
	Lw(A)												37
400		H=	2.7										0.79	0.47	0.31
	Vz	H=	3.2										0.51	0.33	0.24
		H=	3.8										0.33	0.24	0.18
	Vk												4.3
	X0,25												3
	Ps												23
	Lw(A)												41
450		H=	2.7										0.86	0.52	0.36
	Vz	H=	3.2										0.56	0.38	0.28
		H=	3.8										0.38	0.28	0.21
	Vk												4.8
	X0,25												3.3
	Ps												29
	Lw(A)												44

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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