MSA

Splitter sound attenuator, variant MSA200

Splitter thickness 200 mm

MSA

For increased insertion loss and broadband attenuation even in the low frequency range

Splitter sound attenuators with integral splitters with resonating panels, suitable for air conditioning systems

Attenuation effect due to resonance and absorption
Energy efficient due to aerodynamically profiled frame (radius > 15 mm)
Acoustic data measured to ISO 7235
Absorption material is biosoluble and hence hygienically safe
Absorption material faced with glass fibre fabric as a protection against erosion due to airflow velocities up to 20 m/s
Absorption material non-combustible, to EN 13501, fire rating class A1
Intermediate sizes in increments of 1 mm
For use in zones 1 and 2 as well as in zones 21 and 22 according to EU Directive 94/9/EC (ATEX)
Operating temperature up to 100 °C

Optional equipment and accessories

Additional perforated sheet metal to protect the absorption material
Stainless steel, aluminium and PUR-coated constructions upon request

Application

Application

Splitter sound attenuators of Type MSA used for the reduction of fan noise and air-regenerated noise in air conditioning systems
Attenuation effect due to absorption and resonance
Broadband attenuation even in the low frequency range of critical fan noise
Hygiene tested and certified to VDI 6022
For use in potentially explosive atmospheres (ATEX), zones 1, 2, 21 and 22 (outside)

Special characteristics

Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
Up to 30 % lower differential pressure
Energy efficient and/or space saving due to aerodynamically profiled frame
Hygiene tested and certified
Multi-section construction available for large dimensions

Nominal sizes

B: 200 (only MSA100), 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400
MSA100: intermediate sizes (width) 140 – 2399 mm in increments of 1 mm
MSA200: intermediate sizes (width) 250 – 2399 mm in increments of 1 mm
MSA230: intermediate sizes (width) 288 – 2399 mm in increments of 1 mm
Width subdivided: 2401 – 4800 mm, in increments of 1 mm
H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm (intermediate sizes 150 – 1799 mm in increments of 1 mm)
Height subdivided: 1801 – 4800 mm, in increments of 1 mm
L: 500, 750, 1000, 1250, 1500 mm (intermediate sizes 501 – 1499 mm in increments of 1 mm)
Length subdivided: 1501 – 2999 mm in increments of 1 mm

Description

Variants

MSA100: splitter thickness of 100 mm
MSA200: splitter thickness of 200 mm
MSA230: splitter thickness of 230 mm

Construction

Surface of splitter area not covered by a resonating panel

F: Glass fibre fabric
L: Glass fibre fabric and additional perforated sheet metal to protect the absorption material

Duct connection

P: Standard flange 30 mm
W: Angle section frame 35 × 35 × 3 mm

Parts and characteristics

Casing
Aerodynamically profiled frame
Absorption material and resonating panels fitted to reduce air-regenerated noise by absorption and resonance

Construction features

Casing with grooves for increased rigidity; larger sizes are extra reinforced
Aerodynamically profiled splitter frame (radius > 15 mm) that enables a reduction of turbulence both upstream and downstream; frame with grooves for increased rigidity
Frame edges are folded to protect the infill
Attenuators with width or height subdivided have an angle section frame
Operating temperature up to 100 °C

Materials and surfaces

Casing, splitter frames, centre mullion and resonating panels made of galvanised sheet steel
Flange and angle section frame made of galvanised steel
Absorption material is mineral wool

Mineral wool

To EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Standards and guidelines

Insertion loss and sound power level of air-regenerated noise tested to ISO 7235
Meets the hygiene requirements of VDI 6022, DIN 1946, parts 1 and 2 as well as of VDI 3803
Directive 94/9/EC: Equipment and protective systems intended for use in potentially explosive atmospheres

Maintenance

Maintenance-free as construction and materials are not subject to wear

Technical information

Function, Technical data, QUICK SIZING, Specification text, ORDER CODE, Related products

Schematic illustration of MSA, XSA

① Casing
② Duct connection
③ Splitter

Functional description

Splitter sound attenuators of Type MSA contain splitters of Type MKA.

The attenuation effect of the MKA splitters is due to absorption and resonance.

The splitters have a mineral wool infill as absorption material. Part of the splitter surface that runs parallel to the airflow is covered with resonating panels. These panels start oscillating due to the sound (resonance) and hence absorb sound energy. Resonance works best in the frequency range of critical fan noise.

There is a higher attenuation across a wider frequency range when compared to mere absorption splitters.

Splitter thickness	100, 200, 230 mm
Nominal sizes	MSA100: 140 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA200: 250 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA230: 288 × 150 × 500 mm – 2400 × 1800 × 1500 mm
Width subdivided	2401 – 4800 mm
Height subdivided	1801 – 3600 mm
Length subdivided	1501 – 3000 mm
Intermediate sizes	In increments of 1 mm
Operating temperature	– 100 °C

The length (L) of splitter attenuators refers to the airflow direction.

Quick sizing tables provide a good overview of the insertion loss and of differential pressures for different airway widths and airflow velocities. Intermediate values can be calculated with our Easy Product Finder design programme.

The sound power levels L_WA apply to sound attenuators with a cross-sectional area (B × H) of 1 m².

The differential pressures apply to sound attenuators with a height of 1 m.

Sizing example

Given data

Duct B = 800 mm, H = 900 mm

V = 2900 l/s (10440 m³/h)

D_e = 30 dB at 250 Hz

Quick sizing

MSA200 L = 1000 mm, S = 50 mm

Calculation procedure

A = 0.800 × 0.9 = 0.72 m²

v = V ∕ A = 2900 ∕ 0.72 ( ∕ 1000) = 4.0 m/s

Δp_st = 12 Pa

L_WA = 21 dB(A)

MSA, MKA, XSA, XKA, RKA, air-regenerated noise

v_s	m/s	4	6	8	10	12	14	16	18	20
L_WA	dB(A)	21	31	38	43	48	51	55	58	60

MKA100, MSA100, insertion loss and differential pressure

L	S	Centre frequency f_m [Hz]								v_s [m/s]
L	S	63	125	250	500	1000	2000	4000	8000	4	10	20
L	S	D_e								Δp_st
mm	mm	Hz								Pa
500	40	4	10	11	13	21	27	24	18	5	32	>80
1000	40	5	13	20	23	31	38	32	26	7	44	>80
1000	60	5	11	17	19	28	32	27	21	5	33	>80
1500	40	6	16	30	32	42	48	40	34	9	55	>80
1500	60	6	14	25	28	38	41	33	27	6	38	>80
1500	100	4	10	14	19	29	28	19	14	5	29	>80
2000	40	8	19	39	42	50	50	49	42	11	66	>80
2000	60	7	16	32	36	47	50	40	34	7	44	>80
2000	100	5	12	19	25	37	35	23	16	5	32	>80
2000	200	3	9	10	17	25	15	9	8	4	25	>80
2500	40	9	22	48	50	50	50	50	50	12	77	>80
2500	60	8	19	40	45	50	50	47	40	8	50	>80
2500	100	6	14	24	30	45	41	27	19	6	34	>80
2500	200	3	12	12	21	33	19	12	11	4	26	>80
3000	40	10	25	50	50	50	50	50	50	14	>80	>80
3000	60	9	22	48	50	50	50	50	46	9	56	>80
3000	100	7	16	28	36	50	47	31	22	6	37	>80
3000	200	2	14	15	26	41	24	16	14	4	27	>80

MKA200, MSA200, insertion loss and differential pressure

L	S	Centre frequency f_m [Hz]								v_s [m/s]
L	S	63	125	250	500	1000	2000	4000	8000	4	10	20
L	S	D_e								Δp_st
mm	mm	Hz								Pa
500	50	5	7	19	21	26	22	17	14	9	58	>80
500	100	2	4	12	12	15	11	9	8	5	31	>80
1000	50	6	16	33	39	41	39	26	20	11	67	>80
1000	100	4	10	22	23	26	19	13	11	6	35	>80
1000	200	2	7	13	12	12	10	8	6	3	21	>80
1500	50	9	22	44	50	50	50	34	25	12	75	>80
1500	100	5	15	32	33	37	25	16	14	6	40	>80
1500	200	3	9	19	18	15	12	10	7	4	23	>80
1500	400	1	6	10	8	8	6	4	4	2	15	61
2000	50	12	29	50	50	50	50	43	29	13	>80	>80
2000	100	6	19	42	44	47	31	19	17	7	44	>80
2000	200	4	12	25	23	18	15	12	9	4	25	>80
2000	400	1	8	13	10	10	8	5	5	3	17	67
2500	50	14	38	50	50	50	50	49	35	15	>80	>80
2500	100	8	25	50	50	50	38	23	18	8	48	>80
2500	200	5	16	30	29	23	16	13	10	4	28	>80
2500	400	2	10	16	13	12	9	6	5	3	18	72
3000	50	17	48	50	50	50	50	50	40	16	>80	>80
3000	100	10	30	50	50	50	44	26	19	8	53	>80
3000	200	6	19	35	35	27	17	15	11	5	30	>80
3000	400	3	13	19	15	14	10	7	6	3	19	77

MKA230, MSA230, insertion loss and differential pressure

L	S	Centre frequency f_m [Hz]								v_s [m/s]
L	S	63	125	250	500	1000	2000	4000	8000	4	10	20
L	S	D_e								Δp_st
mm	mm	Hz								Pa
500	60	3	7	16	19	21	17	14	14	9	57	>80
500	115	2	5	11	12	13	10	9	10	5	31	>80
1000	60	7	13	27	30	35	25	18	18	10	66	>80
1000	115	4	10	20	20	22	15	12	13	6	35	>80
1000	230	1	7	12	10	8	4	6	8	3	20	>80
1500	60	11	19	38	41	49	33	21	21	12	74	>80
1500	115	7	14	28	28	30	20	15	15	6	40	>80
1500	230	2	10	18	15	10	6	9	9	4	23	>80
2000	60	15	24	50	50	50	42	25	25	13	>80	>80
2000	115	9	19	37	36	39	26	18	18	7	44	>80
2000	230	3	13	24	19	13	8	11	10	4	25	>80
2000	460	0	7	10	3	0	0	3	3	3	16	64
2500	60	19	30	50	50	50	50	29	28	15	>80	>80
2500	115	12	24	46	44	47	31	21	20	8	48	>80
2500	230	4	16	29	24	16	11	13	12	4	27	>80
2500	460	0	9	13	4	0	0	5	3	3	17	69
3000	60	24	36	50	50	50	50	32	32	16	>80	>80
3000	115	14	28	50	50	50	36	24	23	8	52	>80
3000	230	4	19	35	29	18	13	15	13	5	29	>80
3000	460	0	11	16	6	0	0	7	3	3	19	74

Splitter sound attenuators used for the reduction of fan noise and air-regenerated noise in air conditioning systems. Attenuation effect due to absorption and resonance. Energy-saving as well as hygiene tested and certified.

Sound attenuators which consist of a casing with duct connections and splitters. Splitters consists of an aerodynamically profiled frame (radius > 15 mm), absorption material, and resonating panels.

Frame edges are folded to protect the sound absorbing infill.

Insertion loss and sound power level of the air-regenerated noise tested to ISO 7235.

Meets the hygiene requirements of VDI 6022, DIN 1946, parts 2 and 4, as well as of VDI 3803.

Special characteristics

Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
Up to 30 % lower differential pressure
Energy efficient and/or space saving due to aerodynamically profiled frame
Hygiene tested and certified
Multi-section construction available for large dimensions

Materials and surfaces

Casing, splitter frames, centre mullion and resonating panels made of galvanised sheet steel
Flange and angle section frame made of galvanised steel
Absorption material is mineral wool

Mineral wool

To EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Construction

Surface of splitter area not covered by a resonating panel

F: Glass fibre fabric
L: Glass fibre fabric and additional perforated sheet metal to protect the absorption material

Duct connection

P: Standard flange 30 mm
W: Angle section frame 35 × 35 × 3 mm

Technical data

Splitter thickness: 100, 200, 230 mm
Nominal sizes: MSA100: 140 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA200: 250 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA230: 288 × 150 × 500 mm – 2400 × 1800 × 1500 mm
Width subdivided: 2401 – 4800 mm
Height subdivided: 1801 – 3600 mm
Length subdivided: 1501 – 3000 mm
Intermediate sizes: in increments of 1 mm
Operating temperature: – 100 °C

The length (L) of splitter attenuators refers to the airflow direction.

Sizing data

B _______________________ [mm]
H _______________________ [mm]
L (in airflow direction) __________ [mm]
V _______________________ [m³/h]
D_e at 250 Hz ________________ [dB]
Δp_st _______________________ [Pa]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Type
MSA Splitter sound attenuator with casing

Splitter thickness [mm]
100
200
230

Airway width (distance between splitters) [mm]

No. of splitters

Duct connection
P Standard flange 30 mm
W Angle section frame 35 × 35 × 3 mm (required for sound attenuators with width and/or height subdivided)

Splitter surface
F Glass fibre fabric
L Glass fibre fabric and perforated sheet metal

Nominal width B [mm]

Nominal height H [mm]

Nominal length L in airflow direction [mm]

The length (L) of sound attenuator splitters and splitter attenuators refers to the airflow direction. Remember this with regard to vertical ducting.

Order example: MSA100–100–2–WL/400×1500×1500

Splitter thickness	100 mm
Airway width	100 mm
No. of splitters	2
Connecting subframe	Angle section frame
Splitter surface	Glass fibre fabric and perforated sheet metal
Width	400 mm
Height	1500 mm
Length (in airflow direction)	1500 mm

Variants, Dimensions and weight, Product details

Splitter sound attenuator, variant MSA100

Splitter thickness 100 mm

MSA

① Construction with flange
② Construction with angle section frame

B: 200 (only MSA100), 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400
MSA100: intermediate sizes 140 – 2399 mm in increments of 1 mm
MSA200: intermediate sizes 250 – 2399 mm in increments of 1 mm
MSA230: intermediate sizes 288 – 2399 mm in increments of 1 mm
Width subdivided: 2401 – 4800 mm, in increments of 1 mm
H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm (intermediate sizes 150 – 1799 mm in increments of 1 mm)
Height subdivided: 1801 – 4800 mm, in increments of 1 mm
L: 500, 750, 1000, 1250, 1500 mm (intermediate sizes 501 – 1499 mm in increments of 1 mm)
Length subdivided: 1501 – 2999 mm in increments of 1 mm

The total weight of a splitter sound attenuator is the combined weight of the casing (with standard flange or angle section frame) and all splitters.

The total weight for intermediate sizes can be generated with our Easy Product Finder design programme.

For details on corner holes and flange holes see Product Details

Sound attenuator casing, nominal length

500

750

1000

1250

1500

Sound attenuator casing, nominal height

300

600

900

1200

1500

1800

Sound attenuator casing, nominal width

B	MSA100			MSA200			MSA230
B	T	n	S	T	n	S	T	n	S
B	mm	–	mm	mm	–	mm	mm	–	mm
200	100	1	100	–	–	–	–	–	–
400	100	2	100	200	1	200	230	1	85
600	100	2 – 4	50 – 200	200	2	100	230	2	70
800	100	3 – 5	60 – 167	200	2 – 3	67 – 200	230	2	170
1000	100	4 – 7	43 – 150	200	3 – 4	50 – 133	230	3	103
1200	100	4 – 8	50 – 200	200	3 – 5	40 – 200	230	3 – 4	70 – 170
1400	100	5 – 10	40 – 180	200	4 – 5	80 – 150	230	3 – 5	50 – 237
1600	100	6 – 11	46 – 200	200	4 – 7	57 – 200	230	4 – 5	90 – 170
1800	100	6 – 12	50 – 200	200	5 – 8	50 – 160	230	4 – 6	70 – 220
2000	100	7 – 14	43 – 186	200	5 – 8	50 – 200	230	5 – 7	56 – 170
2200	100	7 – 15	47 – 200	200	6 – 9	44 – 167	230	5 – 7	84 – 186
2400	100	8 – 16	50 – 200	200	6 – 10	40 – 200	230	6 – 8	70 – 170

Sound attenuator casing with standard flange, L = 500, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	6	8	10	12	14	16	18	20	24	28
600	9	11	13	15	17	19	21	23	27	31
900	12	14	16	18	20	22	24	26	30	34
1200	15	17	19	21	23	25	27	29	33	37
1500	18	20	22	24	26	28	30	32	36	40
1800	21	23	25	27	29	31	33	35	39	43

Sound attenuator casing with standard flange, L = 750, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	8	10	13	16	19	22	25	27	33	38
600	13	15	18	21	24	26	29	31	36	42
900	17	19	22	25	28	30	33	35	40	46
1200	21	23	26	29	32	34	37	39	44	50
1500	25	27	30	33	36	38	41	43	48	54
1800	29	31	34	37	40	42	45	47	52	58

Sound attenuator casing with standard flange, L = 1000, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	10	14	17	20	24	27	30	34	41	48
600	15	19	22	25	29	32	35	39	46	53
900	20	24	27	30	34	37	40	44	51	58
1200	25	29	32	35	39	43	46	50	57	63
1500	30	34	37	40	44	48	51	55	62	68
1800	35	39	42	45	49	53	56	60	67	73

Sound attenuator casing with standard flange, L = 1250, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	13	17	21	25	29	33	37	41	49	58
600	19	23	27	31	35	39	43	47	54	64
900	25	29	33	37	41	45	49	53	60	70
1200	31	35	39	43	47	51	55	59	66	76
1500	37	41	45	49	53	58	62	65	72	82
1800	43	47	51	55	59	64	68	71	78	88

Sound attenuator casing with standard flange, L = 1500, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	15	19	24	29	33	39	44	48	58	68
600	22	26	31	36	40	46	51	55	65	75
900	30	34	39	44	48	53	58	62	72	82
1200	37	41	46	51	55	60	65	69	79	89
1500	44	48	53	58	62	68	73	77	87	97
1800	51	55	59	65	69	75	80	84	93	104

Sound attenuator casing with angle section frame, L = 500, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	9	13	16	19	23	25	28	32	39	45
600	14	18	21	24	28	30	33	37	44	50
900	18	22	25	28	32	35	38	42	49	55
1200	23	27	30	33	37	40	43	47	54	59
1500	28	32	35	38	42	45	48	52	59	64
1800	33	37	40	43	47	50	53	57	64	69

Sound attenuator casing with angle section frame, L = 750, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	8	12	16	20	24	25	29	33	41	45
600	13	17	21	25	29	30	34	38	46	50
900	17	21	25	29	33	35	39	43	51	55
1200	22	26	30	34	38	40	44	48	56	59
1500	27	31	35	39	43	45	49	53	61	64
1800	32	36	40	44	48	50	54	58	66	69

Sound attenuator casing with angle section frame, L = 1000, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	14	18	23	28	32	37	42	46	56	65
600	21	25	30	35	39	44	49	53	63	72
900	28	32	37	42	46	51	56	60	70	79
1200	35	39	44	49	53	58	63	67	77	86
1500	42	46	51	56	60	65	70	74	84	93
1800	49	53	58	63	67	72	77	81	91	100

Sound attenuator casing with angle section frame, L = 1250, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	15	21	26	31	37	42	47	53	63	75
600	23	29	34	39	45	51	56	62	72	83
900	31	37	42	47	53	59	64	70	80	91
1200	40	46	51	56	62	67	73	79	89	99
1500	48	54	59	64	70	75	80	86	96	107
1800	56	62	67	72	78	83	88	94	104	115

Sound attenuator casing with angle section frame, L = 1500, weights

H	B [mm]
H	200	400	600	800	1000	1200	1400	1600	2000	2400
mm	kg
300	18	24	30	36	42	48	54	60	72	85
600	27	33	39	45	51	57	63	69	81	94
900	36	42	48	54	60	66	72	78	90	103
1200	45	51	57	63	69	76	82	88	100	112
1500	54	60	66	72	78	85	91	97	109	122
1800	63	69	75	81	87	94	100	106	118	131

MKA100, weights

H	Glass fibre fabric (-F)					Glass fibre fabric and perforated sheet metal (-L)
H	L [mm]
H	500	750	1000	1250	1500	500	750	1000	1250	1500
mm	kg
300	2	3	4	5	6	3	4	5	6	8
600	4	5	7	8	10	5	7	9	11	13
900	5	7	9	11	13	7	10	13	16	18
1200	7	10	12	15	17	9	13	16	20	24
1500	8	12	15	18	21	11	16	20	25	29
1800	10	14	19	23	27	14	19	25	31	36

MKA200, weights

H	Glass fibre fabric (-F)					Glass fibre fabric and perforated sheet metal (-L)
H	L [mm]
H	500	750	1000	1250	1500	500	750	1000	1250	1500
mm	kg
300	4	5	6	7.5	9	4	6	7	9	11
600	6	8	10	12	15	7	10	12	15	18
900	8	11	14	17	20	10	14	17	21	25
1200	10	14	18	22	26	13	18	22	27	32
1500	13	17	22	27	31	15	21	27	33	40
1800	16	22	28	34	40	19	27	34	42	50

MKA230, weights

H	Glass fibre fabric (-F)					Glass fibre fabric and perforated sheet metal (-L)
H	L [mm]
H	500	750	1000	1250	1500	500	750	1000	1250	1500
mm	kg
300	4	5	7	8	10	5	6	8	10	12
600	6	9	11	14	16	8	11	13	16	19
900	9	12	16	19	22	11	15	19	23	27
1200	11	16	20	24	28	14	19	24	30	35
1500	14	19	24	29	34	17	23	30	36	43
1800	18	24	31	37	44	21	29	37	45	54

Splitter sound attenuator with standard flange

No. of flange holes per side of the angle section frame – width

B	No. of holes
B	n
mm	–
200 – 259	3
260 – 409	4
410 – 559	5
560 – 709	6
710 – 859	7
860 – 1009	8
1010 – 1159	9
1160 – 1309	10
1310 – 1459	11
1460 – 1609	12
1610 – 1759	13
1760 – 1909	14
1910 – 2059	15
2060 – 2209	16
2210 – 2359	17
2360 – 2400	18

No. of flange holes per side of the angle section frame – height

H	No. of holes
H	n
mm	–
150 – 299	1
300 – 449	2
450 – 599	3
600 – 749	4
750 – 899	5
900 – 1049	6
1050 – 1199	7
1200 – 1349	8
1350 – 1499	9
1500 – 1649	10
1650 – 1799	11
1800	12

Installation details, Basic information and nomenclature

Upstream conditions after bends, junctions or a narrowing or widening of the duct, vertical upstream section, splitters upright

B Width of the sound attenuator
H Height of the sound attenuator

Installation and commissioning

Follow the installation information and comply with the general codes of good practice in order to achieve the given performance data
Up to height H = 1200 mm: any installation orientation, but we recommend upright installation of splitters
From height H = 1201 mm: upright installation only
The length (L) of sound attenuator splitters and splitter sound attenuators refers to the airflow direction; be sure to note how width, height and length are defined, particularly in case of a vertical airflow
Installation in ducts outside of closed rooms requires sufficient protection against the effects of weather

Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₃ [mm]

Outer diameter of circular silencers

L [mm]

Length of attenuator/silencer including spigot (in airflow direction)

L₁ [mm]

Length of acoustic cladding and acoustically effective length

B [mm]

Attenuator width and duct width (upright splitters)

H [mm]

Attenuator height and duct height (upright splitters)

T [mm]

Splitter thickness

S [mm]

Airway width

n [ ]

Number of flange screw holes

m [kg]

Weight

Nomenclature

f_m [Hz]

Octave band centre frequency

L_WA [dB(A)]

A-weighted sound power level of air-regenerated noise

D_e [dB]

Insertion loss

V [m³/h] and [l/s]

Volume flow rate

Δp_st [Pa]

Static differential pressure

All sound power levels are based on 1 pW.

All values were measured in a TROX lab and to EN ISO 7235. Intermediate values may be achieved by interpolation.

Lab measurements exceeding 50 dB are indicated as 50 dB, in line with common practice.

Downloads

certificati

ATEX manufacturer's statement Type MSA

MSA-Atex_CE_ATEX_2022_02_23_DE_en Manufacturer's statement 1.6 MB pdf
Certificate concerning statistical leakage tests

LC_v1_2024_10_DE_en Certificate 660 KB pdf
Declaration of conformity or declaration of incorporation

Type MSA Declaration of conformity or declaration of incorporation 130 KB pdf
Declaration of hygiene conformity Type MSA

MSA_HC_2020_06_09_DE_en Hygiene certificate 1.6 MB pdf

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MSA

For increased insertion loss and broadband attenuation even in the low frequency range

Application

Description

Technical information

Function, Technical data, QUICK SIZING, Specification text, ORDER CODE, Related products

Variants, Dimensions and weight, Product details

Installation details, Basic information and nomenclature

Downloads

certificati

ATEX manufacturer's statement Type MSA

Certificate concerning statistical leakage tests

Declaration of conformity or declaration of incorporation

Declaration of hygiene conformity Type MSA

Referenze

TROX Services

MSA

For increased insertion loss and broadband attenuation even in the low frequency range

Application

Description

Technical information

Function, Technical data, QUICK SIZING, Specification text, ORDER CODE, Related products

Variants, Dimensions and weight, Product details

Installation details, Basic information and nomenclature

Downloads

certificati

ATEX manufacturer's statement Type MSA

Certificate concerning statistical leakage tests

Declaration of conformity or declaration of incorporation

Declaration of hygiene conformity Type MSA

Referenze

TROX Services

TECNICAMENTE NECESSARIO

STATISTICHE E ANALISI DEL SITO WEB

CONVENIENZA E PERSONALIZZAZIONE

PER LA MIGLIORE ESPERIENZA TROX