Sound Attenuator
- QD-ZKFX Rectangular Sound Attenuator
Sound attenuators are designed to reduce noise generated by fans and other equipment in industrial settings. The installation of a sound attenuator on the inlet or outlet of a ventilation system has been proven to reduce noise levels by as much as 10 to 40 dB(A) - and 50 to 93% drop in noise levels. Our sound attenuators are made of either carbon steel or stainless steel depending on customer requirements, and feature a small size, silent performance, light weight, and easy installation. They are widely used in power generation, chemical, metallurgical, and textile industries.
Quanda provides customized sound attenuators to meet unique customer requirements.
This regular sound attenuator is designed to reduce noise in medium and low-pressure fans in air conditioning systems and heat ventilation systems with a silencing effect per unit length as follows: 10~15dB for low frequency, 10~25db for medium frequency, and 25~30db for high frequency. Its average drag coefficient is 0.4, making it ideal for the place where wind speed is 6-12m/s (mm).
Specifications
No Size(mm) Length(mm) Effective Cross-sectional Area (m2) Expansion Ratio (M) Effective Cross-Sectional Frequency (Hz) Applicable Air Volume (mm³/h) A×B a×b Velocity 6m/s Velocity 8m/s Velocity 10m/s Velocity 12m/s 1 800×500 520×230 1600 0.093 4.26 596 2000 2660 3330 4000 2 800×600 510×370 1600 0.139 3.91 507 3000 4000 5000 6000 3 1000×600 700×370 1600 0.186 3.17 480 4000 5330 6670 8000 4 1000×800 770×400 1600 0.231 3.46 420 5000 6660 8320 10000 5 1200×800 700×550 900 0.278 3.43 380 6000 8000 10000 12000 6 1200×1000 780×630 900 0.372 3.20 339 8000 10660 13340 16000 7 1500×1000 950×630 900 0.463 3.29 430 10000 13320 16640 20000 8 1500×1400 1000×970 900 0.695 3.70 513 15000 2000 25000 30000 9 1800×1400 1300×970 900 0.928 2.73 470 20000 26700 33400 40000 10 2000×1800 1500×1310 900 1.390 2.59 393 30000 40000 50000 60000 - QD-ZKGX Rectangular Duct Silencer
Rectangular duct silencers use porous sound absorption materials in airflow ducts to attenuate sound waves for a noise reduction. The friction between acoustic energy and porous sound absorbing materials converts the acoustic energy into heat.
Serial The noise reduction at the octave center frequency (dB) Size(mm) Weight(KG) 100 200 400 800 1600 3150 6300 a b A B Extra-fine glass wool sound attenuator QD-ZG 1 7.7 15 20.8 23.4 26.2 27.2 18.0 300 300 200 200 32.9 2 6.4 12.5 17.3 19.4 21.8 14.6 7.2 300 400 200 300 38.9 3 5.8 11.3 15.6 17.5 19.7 13.2 6.6 300 500 200 400 44.8 4 6.2 12 16.6 18.8 21 14.0 7.0 350 350 250 250 38.1 5 5.1 10 13.9 15.6 17.5 12.0 6.0 350 475 250 375 46.5 6 4.6 9 12.5 14 15.8 10.5 5.3 350 600 250 500 53.9 7 5.1 10 13.9 15.6 17.5 11.7 5.8 400 400 300 300 44.8 8 4.2 8.3 11.6 12.9 14.6 9.7 4.9 400 550 300 450 53.9 9 3.8 7.5 10.4 11.7 13.2 8.8 4.4 400 700 300 600 62.8 - QD-GPX Duct Silencer
The duct silencer is equipped with sound-absorption sheets and installed inside large-scale air ducts. These sound-absorbing sheets form several flat muffler channels, which is why the duct silencer is also called a tubular type silencer. Quanda provides sound-absorbing sheets in a variety of thicknesses, including 50, 100, and 200mm. These sound absorbing sheets are suitable for ductwork with air volume ranges of 750m³/H to 80000m³/H.
- QD-SWX Sound Attenuator
This sound attenuator features a double-wall structure and outstanding silencing effect. The broadband sound absorption is more than 1/3 octave bands, making this sound attenuator ideal for ductwork that needs to be moisture and high temperature resistant. For customers with added requirements for degree of cleanliness, we will also customize the sound attenuator, ensuring it is manufactured in accordance with customer provided design drawings.
- YXSQ Sound Attenuator
This sound attenuator is equipped with a cross sound-absorption sheet within the cross-sectional area to increase the noise reduction performance and rigidity.
Model Size d×L(mm) Flange Length D(mm) Airflow m3/h Insertion loss Pa Noise Reduction dB(A) Model Size d×L(mm) Flange Length D(mm) Airflow m3/h Insertion loss Pa Noise Reduction dB(A) 1 320×1100 200 670~890 5.9 15~20 5 440×1100 320 1720~2290 5.9 15~20 2 340×1100 220 810~1080 5.9 15~20 6 480×1100 360 2180~2910 5.9 15~20 3 370×1100 250 1050~1400 5.9 15~20 7 520×1100 400 2690~3590 5.9 15~20 4 400×1100 280 1320~1750 5.9 15~20 8 570×1100 450 3410~4550 5.9 15~20< - QD-ZB Sound Attenuator
Length (mm) Air Velocity (m/s) Static Pressure Loss (mmH2O) Noise Reduction (dB) in the Frequency (Hz) 125 250 500 1000 2000 4000 900 (one section) 8 3.8 7.0 14.0 18.0 19.5 24.0 25.5 6 1.0 7.0 14.3 20.0 20.7 25.5 25.3 4 0.4 7.5 14.5 22.0 21.7 27.0 28.0 1800 (two sections) 8 5.2 11.0 22.3 31.0 32.2 39.7 40.9 6 2.8 12.6 25.5 35.4 36.8 45.3 41 4 1.4 13.4 27.0 37.6 39.1 48.2 49.7 2700 (three sections) 8 7.0 13.2 26.8 37.2 38.6 47.6 49.1 6 3.2 15.9 32.2 44.7 46.5 57.2 59.0 4 1.9 17.2 34.9 48.4 50.4 62.1 54.0 - ZXSW Sound Attenuator
This sound attenuator features perforated sound absorbing acoustic panels filled with an extra-fine glass wool inside the inner wall for a noise reduction performance.
Model ZXW-I Size 1 2 3 4 5 6 7 A×B(mm) 320×200 320×250 320×320 400×200 400×250 400×320 400×400 Size 8 9 10 11 - - - A×B(mm) 500×200 500×250 500×320 500×400 - - - Model ZXW-II Size 12 13 14 15 16 17 18 A×B(mm) 630×200 630×400 630×500 630×630 800×320 800×400 800×500 Size 19 20 21 22 23 24 25 A×B(mm) 800×630 800×800 1000×400 1000×500 1000×630 1000×800 1000×1000 Model ZXW-III Size 26 27 28 29 30 31 32 A×B(mm) 1250×400 1250×500 1250×630 1250×800 1250×1000 1600×500 1600×630 Size 33 34 35 36 37 38 39 A×B(mm) 1600×800 1600×1000 1600×1250 2000×630 2000×800 2000×1000 2000×1250 - XJYX Sound Attenuator
Sound absorption material inside this sound attenuator is glass wool wrapped in a glass cloth and a galvanized orifice plate lining. This high-performance sound attenuator is often used in air inlets and outlets of ventilation and air conditioning systems to effectively reduce dynamic pressure, increase static pressure, and stabilize the airflow.
- XBYC Sound Attenuator
This sound attenuator is designed for noise reduction in service rooms without affecting ventilation. It will also reduce outdoor interference for server rooms. It is made of a high-quality galvanized steel, aluminum alloy, or stainless steel according to customer requirements, and uses a small, elliptical shaped wing sound absorption sheet for noise reduction. The sound attenuator is widely used in ventilation systems for service rooms, hotels, hospitals, and other areas.
Specifications
Thickness of Sound Attenuator (mm) Size (W×H) Noise Reduction (dB) in the Frequency (Hz) 125 250 500 1000 2000 4000 300 300×600 10.0 11.0 12.0 15.0 19.0 20.0 600×800 10.1 11.2 12.1 15.2 19.2 20.1 900×1000 10.2 11.3 12.2 15.3 19.4 20.3 900×1200 10.3 11.5 12.3 15.5 19.5 20.4 1200×1200 10.5 11.7 12.5 15.6 19.7 20.5 1200×2000 10.8 11.9 12.8 15.8 19.8 20.7
