China Yes CE Approved Decent Standard China Car Conditioner Air Cooled Chiller

• Type: Air Handling Unit
• Air Tube Material: Galvanized Sheet
• Corrosion Durability: Higher
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: DCT-390
• Operating Voltage: 380/400 VAC
• Noise Level: Low
• Application Fields: Mechanical Engineering
• Mounting: Floor Standing
• Lifetime: >20 years
• Certification: CE
• Condition: New
• Size: L3550*H1220*W1550mm
• Pre-Ckwool: 32kg/M3 Neoprene
• Rolvanized Perforated Sheet Steel Maximu: 40PA
• Packing Size: 36500*1320*1750mm
• Weight: 340kg
• Transport Package: Ply Woodcase
• Specification: 4" X 12"
• Trademark: Decent
• Origin: China
• HS Code: 8418991000
• Production Capacity: 10000 Sets/ Year
• Package Size: 80.00cm * 60.00cm * 50.00cm
• Package Gross Weight: 60.000kg

Product Description

Product Description

Sound Attenuators - Rectangular - ARL

Construction:

• Casing: High quality galvanized steel sheet of 0.9mm thickness (standard); up to 1.2mm for bigger sizes.
• Splitters/Baffles: "Bull-Nose" construction using high quality perforated galvanized steel sheet of 0.7mm thickness.200mm splitter width is standard.
• Acoustic Media: Inorganic ,fire resistant , vermin and moisture proof sound absorbent rock wool of 64kg/m³ or 50kg/m³density.
• Liner: Single faced to prevent the media from entering into the air stream.
• Flange: Duct mate flange of 35 mm width.

Categories: Sound Attenuator, Sound Attenuators, Vav & Silencer

• Description

Airmaster sound attenuators are carefully designed to reduce pressure differential at higher velocities and optimally sized to maximize efficiency and minimize cost.
Airmaster is a renowned Sound Attenuators Manufacturers, approved by leading consultants in the region for various prestigious projects such as king saud university (K.S.A), Zallaq Sofitel resort ( Bahrain), command of militery works ( Abu Dhabi schools), etc, are some of the few projects amongst many. We also undertake sound attenuator manufacturing for projects that require large non-standard sizes for large air volumes.
Airmaster is one of the leading Sound Attenuators Manufacturers in the region using a third party renowned selection software for a reliable sound attenuator selection process. We also undertake sound attenuator selection and supply for generator/ fan rooms, and successfully installed in various university, commercial and hospitality projects across the G.C.C.
Description:

•  Aerodynamically designed to ensure maximum insertion loss and minimal
  pressure drop. Air-gap and length of silencer are selected to meet the required NC
  level.
• Sturdy construction and high noise absorbing capacity to obtain required insertion loss without compromising performance . Manufactured to ensure long and maintenance free service.
• Splitters are radiused at both ends giving a bell mouth entry-exit to minimize self generated noise and pressure loss.
• Full width splitters in the middle and half width side splitters .
• Casing construction with lock formed seams meet SMACNA standards thus providing excellent strength and rigidity .Thoroughly sealed to prevent air leakage.
• Duct mate flange connection (standard) on both ends in compliance with DW144 standards.
• Acoustic infill media is of superior quality non combustible & have fungi resistant characteristics meeting the requirements of EN ISO 1182 and ASTM C665 respectively. It has excellent noise reduction coefficient characteristics with an additional qualification of being biologically inert.
• Tested and certified by Intertek USA (NVLAP accredited laboratories) in accordance with ASTM standard E477-06a ,entitled "standard method of testing duct line material and prefabricated silencers for acoustical and airflow performance".

• Silencer Splitter is constructed of solid and perforated metal that is located inside the silencer which protrudes into the air stream and house the acoustic media.

• Options Available Upon Request (Non Standard)

• Flange : M.S angle frame
• Flange width : 30mm or 40mm
• Media : Fiber glass woven glass fabric as liner
• Air gap: From 50mm - 250mm to suit product requirement
• Casing Material: Stainless steel or Aluminium.
• Baffle thickness : 100mm or 300 mm

• Installation Guide:

• Do not place the silencer immediately after the noise source like air handler or blower in order to allow uniform flow profile to develop. Leave at least 2-5 duct diameters in the upstream and downstream of the silencer for better silencer efficiency.
• Do not expose the silencer to dirt or excess humidity while installation or during storage.
• The HVAC system should be designed meticulously for proper dehumidification and air- filtration to prevent microbial growth within the silencer and the duct system.
• It is recommended to install the silencer after the volume control damper to prevent regenerated noise.

• Product Order Checklist:

• Required room sound criteria.
• Airflow data for each silencer
• Duct size and maximum length available for silencer to fit in.
• Details of the air-handling units with its noise levels.
• CAD drawings with clear details of duct routing from each unit and duct- size till the first air outlet.
• Air gap is a gap  between two splitters , standard available gaps are 75,100,125,150,175 & 200mm
• Bull nose is constructed as round convex shape on both side of the splitter to provide smooth airflow.

 

Reducing HVAC Noise

Heating, ventilation and air conditioning systems (HVAC) can become pretty noisy when in use. When used in hotels, HVAC systems can keep customers awake or even distract speakers in conference rooms. Although some air conditioners are noisier than others, proper installation of the systems ensure they run smoothly and produce less noise.

Engineers installing HVAC systems therefore have to find a way of keeping the residential and commercial HVAC systems silent so they do not make distracting noise when running. Noise attenuators, also called sound attenuators or mufflers, are used to keep the systems silent.

What Causes Noise in the HVAC System?

There are many reasons why HVAC systems can become noisy. However, system can still make noise even when new. This is because as the air is being transported through the ducts, vibration of the system causes noise. Also, as the fans rotate to move air, they produce noise as the air vibrates and the fins move.

As air changes in the system, pressure drops and noise is produced. Another major cause of noise is loose fixings such as bolts and nuts vibrating to produce loud, annoying noise.

Types of Noise Attenuators for HVAC Systems

There are two main types of noise attenuators used to silence HVAC systems. They can either be cylindrical or rectangular. Cylindrical attenuators are fitted in the ducts to silence noise from the inside. The rectangular attenuators are fitted over the HVAC system. Both of the attenuators use the same principle in noise reduction in the HVAC systems.

Rectangular attenuators have dissipative silencers that deliver acoustic energy in contact with the sound absorbing media inside it. The round attenuator comes with a head that spins and a cone shaped tail. The circular attenuator is also double walled.

Inside the interior wall is the sound absorbing insulation that helps keep the sound produced to the minimum. The attenuators reduce the noise but also maintain the pressure changes in the HVAC system so air flows through the system with ease.
 

How Does a Noise Attenuator Work?

Noise attenuators are used as a wholesome part of a HVAC system rather than in isolation for the best performance. They are used when the system is being installed for the best effect instead of adding them later.

Noise attenuators have sound absorbing insulation inside to keep the sound down. Acoustic insulation inside the noise attenuator contains millions of air pockets that absorb the acoustic energy as it passes, reducing the noise.

The insulation inside the attenuators vary in thickness depending on the frequency of the sound produced. Increasing the length of the attenuator enhances sound attenuation, affecting the pressure in the HVAC system.

Regular maintenance of the HVAC system is carried out to reduce noise. Maintenance ensures there is no loose fittings in the maintenance system that could significantly increase the noise.

Looking for information about air conditioners? Contact us to find out more about HVAC systems and how they work.
 

Detailed Photos

Air Handling  unit	Air Conditioner
Air handling units usually consist of multiple components including fans, filters, heating and/or cooling elements, humidifying and/or dehumidifying elements, mixing and/or conditioning air elements, control systems, etc.	Air Handling Unit, AHU) has many different types, according to its function, design and application requirements, you can customize the type you need.

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