Fire - Proof, Moisture - Proof and Low - Resistance Design of Aluminum Alloy Rectangular Metal Duct Silencer for Subway Ventilation System

• Customization: Available
• After-sales Service: Yes
• Warranty: 2 Years
• Model NO.: NCC1
• Customized: Customized
• Certification: ISO
• Type: Rectangular Duct Silencer
• Application: Cooling Tower, Central Air Conditioner, HVAC
• Material: Galvanized Steel, Aluminium, Stainless Steel
• Color: Customized
• Shape: Rectangular
• Filling Material: Rock Wool or Glass Fiber Cotton
• Surface Treatment: Metal′s Original Color or Polyester Powder Coating
• Transport Package: Plywood Board Packaging
• Specification: Can be customized
• Trademark: NCC
• Origin: China
• HS Code: 7308300000
• Production Capacity: 2000 M2/Month

Product Description

 

Product Description

The rectangular duct silencer is designed with precision engineering. Through the optimization of its internal structure, it achieves excellent air flow management, reducing aerodynamic noise while maintaining low pressure loss and ensuring the stable operation of the system. Its simple and smooth appearance design takes into account both durability and economy. The modular structure supports flexible customization and can seamlessly fit into various pipeline layouts, such as those of industrial ventilation, purification systems, and environmental protection equipment. The silencer uses environmentally friendly materials and energy-saving technologies. While ensuring acoustic performance, it reduces operating energy consumption, providing reliable guarantees for multiple fields including industrial noise reduction, commercial spaces, and public facilities. It is a universal noise control solution that combines practicality and cost-effectiveness.

Structure

Model                     NFM

Model Size(mm)     L:900~3000,W(min):600,H(min):400

Frame Material       1.0 mm Galvanized steel plate

Blade Material        0.8 mm Galvanized steel perforated plate

Filling Material        Sound-absorbing rock wool or glass fiber                                                cotton:32~100kg/m³

Color                       Customized

 

Application

Industrial Factories
In factory workshops, equipment such as fans and air compressors generates intense noise during operation. The rectangular duct silencer, installed in ventilation and exhaust ducts, provides efficient noise reduction, lowering workshop noise levels to ensure worker safety and comfort while adhering to industrial noise control standards.
Commercial Buildings
HVAC systems in malls, offices, and other commercial spaces maintain comfort but produce noise. The silencer, fitted in air supply/return ducts, blocks operational noise to create quiet shopping environments and tranquil workspaces, enhancing the quality of commercial venues.
Public Facilities
Hospitals, schools, and libraries require strict quietness. Applied to ventilation and central AC ducts, the silencer minimizes noise disrupting patient recovery in hospitals and fosters serene learning/reading environments in schools and libraries, supporting educational activities.
Data Centers
With continuous cooling demands, data centers face significant noise from ventilation systems. Installed in ducts, the silencer reduces noise spillover, minimizing external interference while providing a quieter working space for on-site personnel.
Transportation Hubs
Airports, train stations, and subway systems feature vast spaces with numerous mechanical systems. The silencer suppresses equipment noise in ductwork, reducing passenger disturbance during transit and improving overall hub environmental quality.

 

  

Compliance with International Standards:
The product is designed and tested in strict accordance with global standards, ensuring convenient installation, stable performance, and reliable long - term operation in various application scenarios.
Multiple Material Options:
High - strength aluminum alloy, stainless steel, and galvanized steel are available, achieving a balance among lightweight design, corrosion resistance, high - temperature resistance, and cost - effectiveness for industrial and commercial applications.
Flexible Customization:
With a modular design, both standard sizes and customized configurations are provided. It can adapt to different installation requirements and meanwhile offer efficient noise reduction solutions.
Long - term Quality Assurance:
It has corrosion - resistant coatings (such as powder coating), with a durable and aesthetic surface. The core components come with a 20 - year warranty and comprehensive after - sales support.

 

Product Parameters

 

Silencer Type	Face Velocity	Self Noise(Lw)	DIL,dBat250Hz				Pressure opinN/m²
			Length(mm)				Length(mm)
	m/s	dB	900	1500	2100	3000	900	3000
NFS	5	45	22	31	37	47	142	177
NFM	5	36	15	23	30	39	47	60
N	3	35	15	23	31	41	90	122
NSM	3	31	14	21	29	38	50	78
NES	5	33	14	19	31	41	55	110
NMS	5	36	12	17	23	32	25	47
NFL	5	32	14	17	22	29	20	25
NML	5	30	9	14	19	25	12	22
NL	5	37	8	13	16	23	12	17

Laboratory Testing

 

NCC Acoustic Laboratory - A Laboratory Professionaly Committed to Serving Customers

We exert every ounce of our strength to construct a high-end, avant-garde laboratory endowed with autonomous control capabilities.   For all bespoke products, be it in terms of specifications, dimensions, or acoustic requisites, prior to entering the mass production phase, we shall enforce rigorous and meticulous pre-production sample testing procedures.   Only upon thorough confirmation that all indicators are up to par will we invest a considerable amount of human and material resources to embark on mass production endeavors, thereby effectively guaranteeing that each and every batch of large-scale goods delivered to clients possesses outstanding quality.
 

 The fabricated product samples are positioned within the spacious window of the laboratory and securely fastened through professional sealing measures.   Through precise adjustment of the relevant parameters and concurrent utilization of advanced and precise apparatuses for comprehensive and profound testing, it is ultimately ensured that the products can fully comply with the exacting requirements of customers.
    As depicted in the illustration, the external noise of the laboratory attains 80.1 dB, while through random measurement, the internal acoustic laboratory drops to 36.4 dB or even lower.   The elevated standard of sound insulation not only ensures the accuracy of the experimentation but also furnishes a robust guarantee for the test outcomes.

 

Packaging & Shipping

 

 

 

Company Profile

NCC is a supplier of noise control services and acoustic products. We have developed multiple sets of noise control solutions in various fields such as aerospace, commercial buildings, medical audiometry, industrial engineering, power equipment, subways and tunnels, performing arts buildings, and noise reduction laboratories. We provide customers with electric audiometry rooms, semi anechoic rooms, silent rooms, shielded rooms, listening rooms, fireproof soundproof doors, ventilation silencers, exhaust silencers, and noise reduction louvers Comprehensive professional services and technical support for the design, manufacturing, and installation of cooling tower noise control.

Over the years, NCC has developed into a turnkey supplier of noise control, providing customers with one-stop solutions from concept to completion, including solution consulting, synchronous research and development, construction drawing design, structural design, fluid calculation, air conditioning and electrical system engineering, product manufacturing, installation and commissioning, and testing and acceptance services. With over 70 years of experience in noise control and acoustic engineering, we will provide you with solutions that meet your needs and budget. We look forward to working with you.