MKA

Splitter frames with folded edges

Splitter thickness 100 mm

MKA

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

Energy-saving splitters with resonating panels, ready to be used in 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
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

Sound attenuator splitters with resonating panels, Type MKA, 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

H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm (intermediate sizes 150 – 2500 mm in increments of 1 mm)
Height subdivided: 2501 – 5000 mm, in increments of 1 mm
L: 500, 750, 1000, 1250, 1500 mm (intermediate sizes 501 – 2500 mm in increments of 1 mm)
Length subdivided: 2501 – 3000 mm in increments of 1 mm
Undivided construction: H + L 4000 mm max., H and L 1500 mm max. (if one dimension is 1500 mm, the other one must not exceed 1500 mm)

Description

Variants

MKA100: splitter thickness 100 mm
MKA200: splitter thickness 200 mm
MKA230: splitter thickness 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

Parts and characteristics

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

Useful additions

U-sheets/clamp sheets to join subdivided attenuator splitters

Construction features

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
Operating temperature up to 100 °C (construction with perforated sheet metal up to 300 °C for 8h max.)

Materials and surfaces

Splitter frames, centre mullion and resonating panels made of galvanised sheet 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 MKA100

① Splitter frame
② Opposing resonating panels
③ Absorption material
④ Absorption material faced on both sides with glass fibre fabric
⑤ Centre mullion

Functional description

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	150 × 500 mm – 1499 × 2500, 2500 × 1499 or 1500 × 1500 mm
Height subdivided	2501 – 5000 mm
Length subdivided	1501 – 3000 mm
Intermediate sizes	In increments of 1 mm
Operating temperature	Up to 100 °C

The length (L) of sound attenuator splitters 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.

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

Sound attenuator splitters 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.

Installation kit 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

Splitter frames, centre mullion and resonating panels made of galvanised sheet 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

Technical data

Splitter thickness: 100, 200, 230 mm
Nominal sizes: 150 × 500 mm – 1499 × 2500, 2500 × 1499 or 1500 × 1500 mm
Height subdivided: up to 5000 mm
Length subdivided: up to 3000 mm
Intermediate sizes: in increments of 1 mm
Operating temperature: up to 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
MKA Sound attenuator splitter with resonating panels

Splitter thickness [mm]
100
200
230

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

Height H [mm]

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: MKA100–L/1500×1500

Splitter thickness	100 mm
Splitter surface	Glass fibre fabric and perforated sheet metal
Height	1500 mm
Length	1500 mm

Dimensions and weight

MKA

H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm (intermediate sizes 150 – 2500 mm in increments of 1 mm)
Height subdivided: 2501 – 5000 mm, in increments of 1 mm
L: 500, 750, 1000, 1250, 1500 mm (intermediate sizes 501 – 2500 mm in increments of 1 mm)
Length subdivided: 2501 – 3000 mm in increments of 1 mm
Undivided construction: H + L 4000 mm max., H and L 1500 mm max. (if one dimension is 1500 mm, the other one must not exceed 1500 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.

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

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

Splitters are supplied as ready-to-install kits
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

informazioni di prodotto

Product data sheet Type MKA

Product data sheet 290 KB pdf

certificati

Declaration of hygiene conformity Type MKA

MKA_HC_2020_06_09_DE_en Hygiene certificate 2.1 MB pdf
Non-CE Manufacturer's statement MKA

MKA_NotCE_2022_02_08_14_48_52_DE_en Certificate 2.1 MB pdf
Statement Type MKA

Statement 130 KB pdf

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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

Dimensions and weight

Installation details, Basic information and nomenclature

Downloads

informazioni di prodotto

Product data sheet Type MKA

certificati

Declaration of hygiene conformity Type MKA

Non-CE Manufacturer's statement MKA

Statement Type MKA

TROX Services

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