MK | TROX GmbH

Sound attenuator splitters type MK

Aerodynamically optimised splitter frame

Tested to VDI 6022

MK

Splitter with high insertion loss and broadband attenuation even in the low frequency range

Sound attenuator splitters with resonating panels, ready to be used in ventilation and air conditioning systems

Attenuation effect due to absorption and resonance
Energy efficient due to aerodynamically formed frame (bullnose radius 20 mm)
Acoustic data measured to EN ISO 7235
Sound absorbing material is biosoluble and hence hygienically safe
Sound absorbing material faced with glass fibre fabric as a protection against erosion due to airflow velocities up to 20 m/s
The sound absorbing material is non-combustible, to EN 13501, fire rating class A1
For use in areas with potentially explosive atmospheres (according to EC Directive 2014/34/EU (ATEX)), zones 1, 2, and zones 21 and 22 (outside) according to EC Directive 1999/92/EC
Operating temperature up to 100 °C, with expanded metal (variant L) up to 300 °C for a limited period of time

Optional equipment and accessories

Expanded metal as an additional mechanical protection for the sound absorbing material
Stainless steel variant A2 (1.4301), with optional perforated metal facing as an additional protection for the sound absorbing material
Other stainless steel and aluminium variants as well as PUR coating are upon request
U-sheets and clamp sheets to join subdivided attenuator splitters

General information

Application

Sound attenuator splitters with resonating panels are used for the reduction of fan and air-regenerated noise in ventilation and 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 compliant with VDI 6022
For use in areas with potentially explosive atmospheres (EC Directive 2014/34/EU (ATEX)), zones 1, 2, 21 and 22 (outside) according to Directive 1999/92/EC

Special characteristics

Resonating panels ensure increased insertion loss in the frequency range of critical fan noise

Energy savings due to aerodynamically formed splitter frame
- Up to 30 % lower differential pressure
Hygiene tested and compliant with VDI 6022
Multi-section construction available for large dimensions

Nominal sizes

H: 150 – 2500 mm
L: 500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500 mm
Intermediate sizes of H and L are possible: 150 – 2500 mm in increments of 1 mm
Undivided construction: H + L 600 mm min., 4000 mm max., 100 kg max.
- Dependency for H and L: If one dimension is greater than 1500 mm, the other one must not exceed 1500 mm
Height or length subdivided in case of a deviation, and for sizes 2501 – 5000 mm
- Height subdivided from H ≥ 2501 mm, otherwise length subdivided

Variants

MK100: splitter thickness 100 mm
MK200: splitter thickness 200 mm
MK230: splitter thickness 230 mm

Construction

Half of the splitter is covered by a resonator plate

F: Glass fibre fabric
L: Glass fibre fabric faced with expanded metal cover for additional mechanical protection of the sound absorbing material

Materials and surfaces

No entry: galvanised steel 1.0917
A2: stainless steel 1.4301
- Construction L: Glass fibre fabric with perforated metal facing for additional mechanical protection of the sound absorbing material
P1: powder-coated, RAL 7001, silver grey

Parts and characteristics

Aerodynamically profiled frame
- Reduced weight and increased rigidity due to special profile
- Helps to optimise the airflow, hence reducing the air-regenerated noise
- Reduces the pressure loss
- Covers the edges of the sound absorbing material
Absorption material and resonating panels fitted to reduce air-regenerated noise by absorption and resonance

Accessories

U-sheets/clamp sheets to join subdivided attenuator splitters (included with subdivided splitter constructions)

Construction features

Aerodynamically formed splitter frame (bullnose radius 20 mm) that helps to reduce turbulence on both the upstream and downstream sides; frame with grooves for increased rigidity
Frame edges with bullnose to protect the infill
Operating temperature up to 100 °C; variant L up to 300 °C for 8h max.

Material and surfaces

Splitter frame, centre mullion and resonating panels made of galvanised sheet steel 1.0917 or stainless steel 1.4301
Expanded metal cover made of galvanised steel 1.0917
Perforated metal facing made of stainless steel 1.4301
Sound absorbing material mineral wool
- According to EN 13501, fire rating class A1, non-combustible
- RAL quality mark RAL-GZ 388
- Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
- Faced with glass fibre fabric, as a protection against erosion from airflow velocities of up to 20 m/s
- Inert to fungal and bacterial growth according to EN 846

Standards and guidelines

Insertion loss and sound power level of air-regenerated noise tested to ISO 7235
Meets the hygiene requirements of VDI 6022, VDI 3803 Part 1 and DIN 1946 Part 4
EC Directive 2014/34/EC (ATEX): Equipment and protective systems intended for use in areas with potentially explosive atmospheres
EC Directive 1999/92/EC (ATEX): Improvement of the safety and health protection of workers potentially at risk from explosive atmospheres.

Maintenance

Low-maintenance as construction and materials are not subject to wear

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Schematic illustration of MK100

1 Splitter frame

2 Opposing resonating panels

3 Sound absorbing material

4 Sound absorbing material faced on both sides with glass fibre fabric

5 Centre mullion

The attenuation effect of the MK splitters is due to absorption and resonance. The splitters have a mineral wool infill as sound absorbing 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 (H × L)	150 × 450 – 1500 × 2500 mm, 450 × 150 – 2500 × 1500 mm
Height subdivide	2501 – 5000 mm or if H and L > 1500 mm
Length subdivided	2501 – 5000 mm or if H and L > 1500 mm
Intermediate sizes	In increments of 1 mm
Operating temperature	Up to 100 °C, variant L up to 300 °C for 8 h max.

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

MK100, MS100, insertion loss D_e [dB] and differential pressure Δp_t[Pa]

L	Airway width	Centre frequency f_m [Hz]								v_s [m/s]
L	Airway width	63	125	250	500	1000	2000	4000	8000	6	10	14
500	50	4	9	10	11	19	25	21	16	10	29	56
500	100	3	4	5	8	13	15	11	8	8	23	45
1000	50	5	11	18	20	28	34	28	23	13	37	72
1000	80	4	8	12	16	23	25	19	15	10	28	55
1000	100	4	7	9	13	21	21	15	11	9	26	51
1500	50	6	14	26	29	37	42	36	29	16	44	87
1500	80	5	11	18	22	32	32	24	19	12	32	63
1500	100	4	9	14	19	29	28	19	13	10	29	56
2000	50	7	17	34	38	46	> 50	44	36	19	52	102
2000	80	6	14	24	29	40	40	29	23	13	36	70
2000	100	5	12	19	24	37	34	22	16	11	32	62
2500	50	8	20	42	47	> 50	> 50	> 50	43	22	60	118
2500	80	7	16	30	35	48	47	34	27	14	40	78
2500	100	6	15	24	30	44	41	26	19	12	34	67
3000	50	9	22	50	> 50	> 50	> 50	> 50	50	24	68	133
3000	80	8	19	35	42	> 50	> 50	39	31	16	44	85
3000	100	7	17	28	35	> 50	47	30	22	13	37	73

MK200, MS200, insertion loss De [dB] and differential pressure Δpt [Pa]

L	Airway width	Centre frequency f_m [Hz]								v_s [m/s]
L	Airway width	63	125	250	500	1000	2000	4000	8000	6	10	14
500	50	4	6	18	21	24	18	15	13	21	58	114
500	100	2	4	12	13	15	12	10	8	11	31	61
1000	50	6	13	29	34	39	29	20	17	24	67	131
1000	80	5	11	24	26	29	22	16	13	15	43	84
1000	100	4	9	21	22	24	19	13	11	13	35	69
1500	50	8	20	41	46	> 50	41	26	21	27	75	147
1500	80	6	16	33	36	40	30	20	16	17	48	94
1500	100	5	14	30	32	34	25	17	14	14	40	78
2000	50	10	28	> 50	> 50	> 50	> 50	31	26	30	83	164
2000	80	8	22	43	47	> 50	39	24	19	19	53	105
2000	100	7	20	38	41	43	32	21	17	16	44	86
2000	200	3	12	23	22	18	12	10	7	9	25	50
2500	50	13	35	> 50	> 50	> 50	> 50	37	30	33	92	180
2500	80	10	28	> 50	> 50	> 50	47	28	23	21	59	115
2500	100	8	25	47	50	> 50	39	24	19	17	48	94
2500	200	4	14	29	28	22	14	11	8	10	28	54
3000	50	15	42	> 50	> 50	> 50	> 50	42	34	36	100	197
3000	80	11	34	> 50	> 50	> 50	> 50	33	26	23	64	126
3000	100	10	30	> 50	> 50	> 50	46	28	22	19	53	103
3000	200	5	17	35	34	26	16	13	10	11	30	59

MK230, MS230, insertion loss De [dB] and differential pressure Δpt [Pa]

L	Airway width	Centre frequency f_m [Hz]								v_s [m/s]
L	Airway width	63	125	250	500	1000	2000	4000	8000	6	10	14
500	80	2	6	14	16	18	14	12	12	15	43	84
500	100	2	5	12	13	15	11	10	11	13	35	69
1000	80	6	11	24	25	29	21	15	15	18	49	97
1000	100	5	10	21	22	25	17	13	14	14	40	78
1000	200	2	7	14	12	10	6	7	9	8	23	44
1500	80	9	17	34	35	41	28	19	18	20	56	109
1500	100	8	15	31	31	34	23	16	16	16	45	88
1500	200	3	11	20	17	14	9	10	10	9	25	49
2000	80	13	22	44	45	> 50	34	22	22	22	62	121
2000	100	11	20	40	39	44	29	20	19	18	50	98
2000	200	4	14	26	23	18	12	12	12	10	28	54
2500	80	16	27	> 50	> 50	> 50	41	25	25	25	68	134
2500	100	13	25	49	48	> 50	35	23	22	20	55	108
2500	200	5	18	33	28	22	15	15	13	11	30	59
3000	80	19	33	> 50	> 50	> 50	48	29	28	27	74	146
3000	100	16	30	> 50	> 50	> 50	41	26	25	22	60	117
3000	200	6	21	39	34	26	17	17	15	12	33	64

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

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.
Installation kit consists of an aerodynamically profiled frame (bullnose radius of 20 mm), sound absorbing material and resonating panels.
The splitter frame reduces pressure losses and air-regenerated noise. The special profile helps to reduce the weight and increase the rigidity of the splitters. Frame edges with bullnose 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, VDI 3803 Part 1 and DIN 1946 Part 4.
For use in areas with potentially explosive atmospheres (ATEX), zones 1, 2, 21 and 22 (outside) according to Directive 1999/92/ EC.

Special characteristics

Resonating panels ensure increased insertion loss in the frequency range of critical fan noise

Energy savings due to aerodynamically formed splitter frame
- Up to 30 % lower differential pressure
Hygiene tested and compliant with VDI 6022
Multi-section construction available for large dimensions

Material and surfaces

Splitter frame, centre mullion and resonating panels made of galvanised sheet steel 1.0917 or stainless steel 1.4301
Expanded metal cover made of galvanised steel 1.0917
Perforated metal facing made of stainless steel 1.4301
Sound absorbing material mineral wool
- According to EN 13501, fire rating class A1, non-combustible
- RAL quality mark RAL-GZ 388
- Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
- Faced with glass fibre fabric, as a protection against erosion from airflow velocities of up to 20 m/s
- Inert to fungal and bacterial growth according to EN 846

Construction

Half of the splitter is covered by a resonator plate

F: Glass fibre fabric
L: Glass fibre fabric faced with expanded metal cover for additional mechanical protection of the sound absorbing material

Materials and surfaces

No entry: galvanised steel 1.0917
A2: stainless steel 1.4301
- Construction L: Glass fibre fabric with perforated metal facing for additional mechanical protection of the sound absorbing material
P1: powder-coated, RAL 7001, silver grey

Technical data

Splitter thickness: 100, 200, 230 mm
Dimensions: 150 × 450 – 1500 × 2500 mm, 450 × 150 – 2500 × 1500 mm
Height subdivided: up to 5000 mm
Length subdivided: up to 5000 mm
Intermediate sizes: in increments of 1 mm
Operating temperature: up to 100 °C, variant L up to 300 °C for 8 h max.

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

B [mm]
H [mm]
L (in airflow direction) [mm]
q_v (m³/h)
D_e At 250 Hz [dB]
Δp_st [Pa]

–

…

–

200

600

1500

1 Type

MK Sound attenuator splitter with resonating panels

2 Variant
No entry: TROX standard variants

3 Splitter surface
F Glass fibre fabric
L Glass fibre fabric and expanded metal

4 Material
No entry: galvanised steel (1.0917)
A2 Stainless steel (1.4301)
P1 powder-coated, RAL 7001 (silver grey)

5 Splitter thickness [mm]
100, 200, 230

6 Height [mm]
150 – 5000

7 Length in airflow direction [mm]
150 – 5000

Order example: MK–F-A2/100×1500×1000

Splitter surface	Glass fibre fabric
Material	Stainless steel 1.4301
Splitter thickness	100 mm
Height	1500 mm
Length	1000 mm

Assembly material SDKTo be ordered separately if splitters are to be subdivided by others.

SDK	–	A2	/	200	/	2
\|		\|		\|		\|
1		2		3		4

1 Type
SDK Accessories for splitters

2 Material
No entry: galvanised steel (1.0917)
A2 Stainless steel (1.4301)
P1 Galvanised steel (1.0917) and powder-coated, RAL 7001 (silver grey)

3 Splitter thickness T [mm]
100 contains 2 U-sheets
200 contains 2 U-sheets
230 contains 2 U-sheets
300 contains 2 U-sheets

4 Number of clamping plates for connection point
No entry: without clamping plates (for H or L ≤ 750 mm)
2 for H or L 751 - 1000 mm
4 for H or L ≥ 1001 mm

Order example: SDK-A2/200/2

Material	Stainless steel (1.4301)
Splitter thickness	200 mm, with 2 U-sheets
No. of clamp sheets	2

Dimensions, Weights

H: 150 – 2500 mm
L: 500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500 mm
Intermediate sizes of H and L are possible: 150 – 2500 mm in increments of 1 mm
Undivided construction: H + L 600 mm min., 4000 mm max., 100 kg max.
Size limit for H or L: If one dimension is greater than 1500 mm, the other one must not exceed 1500 mm
Height or length subdivided is possible for sizes 2501 – 5000 mm

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

MK 100 – Glass fibre fabric (-F)

MK 100 – Glass fibre fabric and expanded metal (-L)

MK 100 – Glass fibre fabric and perforated sheet metal (-L-A2)

MK 200 – Glass fibre fabric and expanded metal (-L)

MK 200 – Glass fibre fabric and perforated sheet metal (-L-A2)

MK 230 – Glass fibre fabric and expanded metal (-L)

MK 230 – Glass fibre fabric and perforated sheet metal (-L-A2)

Accessories – variant ACC, Installation details

A Construction with length subdivided

H 1000 × L 4000 with 2 U-sheets, 2 clamp sheets

B Height subdivided

H 2000 × L 2500 with 2 U-sheets, 4 clamp sheets

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 and the splitters

Installation and commissioning

Follow the installation manual and comply with the general codes of good practice in order to achieve the given performance data
Up to height H = 1200 mm, length L = 1500 mm and 40 kg: 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
A turbulent airflow may cause damage to the splitters
- A straight upstream section is required upstream of the sound attenuator
- The recommended minimum upstream section depends on the change of direction, change of cross-section and splitter arrangement
Installation in ducts outside closed rooms requires sufficient protection against the effects of weather

Accessories – variant ACC

U-sheets/clamp sheets to join subdivided attenuator splitters (included with subdivided splitter constructions)
U-sheets and clamping sheets (ACC) for previously provided single splitters that are to be connected
- Made of galvanised sheet steel 1.0917 or stainless steel 1.4301
- Number according to division rule for height or length subdivided splitters
- Specification of the total dimensions is necessary for the delivery of the recommended number of pieces
Fixing material for connecting the U-sheets and clamp sheets to the sound attenuator to be provided by others

Number of clamp sheets per splitter joint:
H or L ≤ 750 mm: without clamp sheet
H or L 751 – 1000 mm: 1 clamp sheet on each side
H or L > 1000 mm: 2 clamp sheets on each side recommended
Number of U-sheets per splitter joint: 2
Follow the instructions in the installation manual.

Downloads

product information

Product data sheet Type MK

MK_PD_2024_04_17_DE_en Product data sheet 3,9 MB pdf

certificates

ATEX manufacturer's statement MK

MK-Atex_CE_ATEX_2022_02_23_DE_en Manufacturer's statement 1,9 MB pdf
Declaration of hygiene conformity MK

MK_HC_2024_05_DE_en Certificate 2 MB pdf
Non-CE Manufacturer's statement MK

MK_NotCE_2022_02_08_14_49_06_DE_en Certificate 1,9 MB pdf

operation manuals

Installation manual MK

XS_MS_XK_MK_RK_IM_A00000090240_V1_2022_04_GB_en Installation manual 2,7 MB pdf

By clicking the button, you allow us to provide you with an excellent website experience and easy shopping processes. These cookies include ones that are necessary for the operation of the site and for the control of our services and applications, as well as ones that are used solely for statistical purposes, for convenience settings or to display personalized content. You can decide which categories you want to allow and you can adjust the data utilisation settings based on your individual requirements. Please note that, depending on the settings that you have selected, all functionalities of the page might not be available. You can change your selection at any time.

TECHNICALLY NECESSARY

These cookies are necessary for the proper functioning of our website and cannot be disabled. As a rule, these cookies are set only in response to actions taken by you, such as setting your privacy preferences or filling the shopping cart. In addition, security-relevant functionalities or support via a dedicated webchat are integrated, including all session cookies from TROX set after you log in as a customer. You can set your browser to block these cookies or notify you about them. As a result, however, some areas of the website might not function as intended.

MK

Splitter with high insertion loss and broadband attenuation even in the low frequency range

General information

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Dimensions, Weights

Accessories – variant ACC, Installation details

Accessories – variant ACC

Downloads

product information

Product data sheet Type MK

certificates

ATEX manufacturer's statement MK

Declaration of hygiene conformity MK

Non-CE Manufacturer's statement MK

operation manuals

Installation manual MK

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE