Splitter sound attenuators Type 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) Splitter frames with folded edges 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

Splitter sound attenuators Type Page Technical data MSA - 5 Quick sizing MSA - 6 Specification text MSA - 9 Order code MSA - 10 Dimensions and weight MSA - 12 Product details MSA - 17 Installation details MSA - 19 Basic information and nomenclature MSA - 21 Application - Splitter sound attenuators of Type MSA used for the reduction of fan noise and airregenerated 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...

Splitter sound attenuators General information – 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- MSA 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...

Splitter sound attenuators 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...

Splitter sound attenuators Technical data Splitter thickness Nominal sizes Width subdivided Height subdivided Length subdivided Intermediate sizes Operating temperature The length (L) of splitter attenuators refers to the airflow direction.

Splitter sound attenuators 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 LWA apply to sound attenuators with a cross-sectional area (B x H) of 1 m2. The differential pressures apply to sound attenuators with a height of 1 m.

Splitter sound attenuators MKA200, MSA200, insertion loss and differential pressure Sizing example Given data Duct B = 800 mm, H = 900 mm V = 2900 I/s (10440 m3/h)

Splitter sound attenuators De = 30 dB at 250 Hz Quick sizing MSA200 L = 1000 mm, S = 50 mm Calculation procedure A = 0.800 x 0.9 = 0.72 m2 v = V/A = 2900/0.72 (/1000) = 4.0 m/s Apst = 12 Pa Lwa = 21 dB(A)

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

Splitter sound attenuators MSA The length (L) of sound attenuator splitters and splitter attenuators refers to the airflow direction. Remember this with regard to vertical ducting. MSA MSA200 - 100 - 3 - P F / 900x600x1500 i \k i \k \k i i MSA Splitter sound attenuator with casing F □ Airway width (distance between splitters) [mm] ® □ No. of splitters □ Duct connection P Standard flange 30 mm W Angle section frame 35 x 35 x 3 mm (required for sound attenuators with width and/or height subdivided) Order example: MSA100-100-2-WL/400x1500x1500 Splitter thickness Airway width No. of splitters Connecting...

Splitter sound attenuators Splitter sound attenuator, variant MSA100 Splitter sound attenuator, variant MSA200

Splitter sound attenuators – 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,...

Splitter sound attenuators © Construction with flange @ Construction with angle section frame Sound attenuator casing, nominal length 02/2017 - DE/en TROX ®TECHNIK