Metal Ventilation Rectangular or Elbow Air Duct for HVAC and AC

Product Description

Product Description

Material:
Generally galvanized steel
Aluminum and stainless steel customizable
Filling Material: Rock wool or glass fiber cotton
Materials can be customized.

·Finish Treatment:
1. Metal's original color
2. Polyester Powder Coating (PPC)

Size and shape can be customized.

Application
 

Cooling tower ventilation and noise reduction

Central air - conditioning ventilation and noise reduction

HVAC ventilation and noise reduction

Fan noise reduction

Factory ventilation systems

Equipment room ventilation systems

Hotel and commercial building ventilation systems

Soundproof enclosures ventilation and noise reduction

Type

1. Rectangular

2. Elbow - shaped
 

2. Reducing - diameter

 

Our Advantages

 

Effective noise reduction
It can significantly reduce the noise generated during the operation of the air duct system, providing a quiet and comfortable indoor environment.

Improve air quality
While reducing noise, it does not affect the normal circulation of air, ensuring a good ventilation effect and thereby improving indoor air quality. 

Energy-saving and efficient
The optimized air duct design reduces wind resistance and lowers the energy consumption of the fan, helping to save energy costs.,

Strong stability
It has good compression and deformation resistance capabilities and can maintain good performance and shape during long-term use.

Good fire performance: Made of fireproof materials, it can prevent the spread of fire to a certain extent and improve the fire safety of buildings.

Long service life
High-quality materials and excellent manufacturing processes give it a long service life, reducing the frequency of replacement and maintenance.

 

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.

 

Test Report

 

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.