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(PS/) SNS-1A (RAL9016) • Square nozzle diffusers with square pattern

Multinozzle diffusers
Square
Steel and plastics
White, RAL 9016
Adjustable

Accessories

PPS-P • Polystyrene plenum box PPS-APD • Duct connections for insulated PPS plenum box & plate REV-B • Square plenum boxes REV-B ISO • Square insulated plenum boxes CRC • Circular regulating valves for plenum boxes 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 square pattern and to be equipped with a plenum box.

The nozzles are designed for high Coanda effect at both low and high flow rates.

PS/SNS-1A = diffuser SNS-1A 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 9010, 9006 and 9005, price on request

Composition

Frontplate made of powder coated steel
Nozzles made out of Bayblend® a blend of ABS and polycarbonate made of recycled plastics
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
Non-insulated square plenum box, type REV-B
Insulated square 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 square 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 (PS)/SNS-1A

Order example

SNS-1A, 600 + REV-B 600 + CRC 250

Explanation

SNS-1A= Diffuser type

600 = Diffuser size

Accessories

REV-B = Plenum box

600 = Size plenum box

CRC = Regulating valve for plenum box

250 = Plenum box connection diameter

Dimensions

	AxA [mm]	# Nozzles
SNS-1A 300-36	296x296	36
SNS-1A 400-64	396x396	64
SNS-1A 500-80	496x496	80
SNS-1A 600-100	596x596	100
SNS-1A 600-144	596x596	144
SNS-1A 625-100*	621x621	100
PS/SNS-1A 300/596-36	596x596	36
PS/SNS-1A 400/596-64	596x596	64
PS/SNS-1A 500/596-80	596x596	80
* niet meer verkrijgbaar / n'est plus disponible / no longer available

Quick selection

SNS 1A	- # Nozzles			300 - #36			400 - #64			500 - #80			600 - #100 / 625* - #100			600 - #144
	Ak			0.0093			0.0165			0.0206			0.0258			0.0372
Q	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
75		H=	2.7	0.42	0.2	0.12	0.38	0.18	0.11	0.35	0.17	0.1
	Vz	H=	3.2	0.23	0.13	0.08	0.2	0.12	0.07	0.19	0.1	0.07
		H=	3.8	0.13	0.08	0.06	0.12	0.07	0.05	0.1	0.07	0.05
	Vk			2.2			1.3			1
	X0,25			1.9			1.8			1.7
	Ps			5			2			1
	Lw(A)			21			<20			<20
100		H=	2.7	0.53	0.27	0.17	0.46	0.23	0.14	0.42	0.21	0.12	0.37	0.18	0.11
	Vz	H=	3.2	0.3	0.18	0.12	0.26	0.15	0.1	0.23	0.13	0.09	0.2	0.11	0.07
		H=	3.8	0.18	0.12	0.08	0.15	0.1	0.07	0.13	0.09	0.06	0.11	0.07	0.05
	Vk			3			1.7			1.3			1.1
	X0,25			2.1			2			1.9			1.8
	Ps			10			4			2			2
	Lw(A)			28			<20			<20			<20
150		H=	2.7	0.72	0.4	0.26	0.6	0.33	0.21	0.57	0.31	0.19	0.49	0.25	0.15	0.38	0.18	0.11
	Vz	H=	3.2	0.44	0.28	0.2	0.36	0.22	0.15	0.34	0.21	0.14	0.28	0.17	0.11	0.2	0.12	0.07
		H=	3.8	0.28	0.2	0.15	0.22	0.15	0.11	0.21	0.14	0.1	0.17	0.11	0.08	0.12	0.07	0.05
	Vk			4.5			2.5			2			1.6			1.1
	X0,25			2.7			2.4			2.3			2.1			1.8
	Ps			22			8			5			3			2
	Lw(A)			37			25			<20			<20			<20
200		H=	2.7				0.75	0.43	0.28	0.7	0.4	0.26	0.61	0.33	0.21	0.46	0.24	0.14
	Vz	H=	3.2				0.47	0.3	0.21	0.43	0.28	0.2	0.36	0.23	0.16	0.26	0.15	0.1
		H=	3.8				0.3	0.21	0.16	0.28	0.2	0.15	0.23	0.16	0.12	0.15	0.1	0.07
	Vk						3.4			2.7			2.2			1.5
	X0,25						2.8			2.7			2.4			2
	Ps						14			9			6			3
	Lw(A)						33			28			23			<20
250		H=	2.7				0.87	0.52	0.35	0.83	0.49	0.33	0.7	0.4	0.26	0.54	0.29	0.18
	Vz	H=	3.2				0.56	0.37	0.27	0.53	0.35	0.25	0.43	0.28	0.2	0.32	0.19	0.13
		H=	3.8				0.37	0.27	0.21	0.35	0.25	0.19	0.28	0.2	0.15	0.19	0.13	0.1
	Vk						4.2			3.4			2.7			1.9
	X0,25						3.3			3.1			2.7			2.2
	Ps						21			14			9			4
	Lw(A)						38			34			28			<20
300		H=	2.7							0.93	0.56	0.39	0.79	0.46	0.31	0.62	0.34	0.22
	Vz	H=	3.2							0.61	0.41	0.3	0.5	0.33	0.24	0.37	0.23	0.16
		H=	3.8							0.41	0.3	0.24	0.33	0.24	0.18	0.23	0.16	0.12
	Vk									4			3.2			2.2
	X0,25									3.5			3			2.4
	Ps									20			13			6
	Lw(A)									39			33			23
350		H=	2.7							1.04	0.65	0.46	0.89	0.54	0.37	0.69	0.39	0.25
	Vz	H=	3.2							0.7	0.48	0.36	0.58	0.39	0.29	0.42	0.27	0.19
		H=	3.8							0.48	0.36	0.29	0.39	0.29	0.22	0.27	0.19	0.14
	Vk									4.7			3.8			2.6
	X0,25									4			3.4			2.6
	Ps									28			18			9
	Lw(A)									43			37			27
400		H=	2.7										0.97	0.6	0.42	0.75	0.44	0.29
	Vz	H=	3.2										0.65	0.44	0.33	0.47	0.31	0.22
		H=	3.8										0.44	0.33	0.26	0.31	0.22	0.17
	Vk												4.3			3
	X0,25												3.7			2.9
	Ps												23			11
	Lw(A)												41			31
450		H=	2.7										1.05	0.66	0.47	0.82	0.48	0.33
	Vz	H=	3.2										0.71	0.49	0.37	0.52	0.35	0.25
		H=	3.8										0.49	0.37	0.29	0.35	0.25	0.19
	Vk												4.8			3.4
	X0,25												4.1			3.1
	Ps												29			14
	Lw(A)												44			34
500		H=	2.7													0.88	0.53	0.36
	Vz	H=	3.2													0.57	0.39	0.28
		H=	3.8													0.39	0.28	0.22
	Vk															3.7
	X0,25															3.4
	Ps															17
	Lw(A)															37
600		H=	2.7													1	0.62	0.44
	Vz	H=	3.2													0.67	0.46	0.34
		H=	3.8													0.46	0.34	0.27
	Vk															4.5
	X0,25															3.9
	Ps															25
	Lw(A)															42

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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