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Tag: HVAC Ductwork Accessories

Posts related to HVAC Ductwork Accessories

Die Cast Aluminium Louver Outdoor Testing

Casting Aluminium External Louver - CAEL
cast aluminium louver 1
We do a outdoor test from 25th of Dec., 2017 to 9th of Mar., 2018. For the CAEL casting louver, our major difference from the others in the market is the finish, in order to prevent it getting rusty or oxidation, we have put on an extra powder coating on its surface which makes it being of higher quality and nicer finish, below is our test report. Outdoor Test Record DATE Natural finish NOTE RAL9006 powder coating NOTE Weather condition 2017/12/25 1-1 dry & clean 1-2 dry & clean Sunny 2018/1/2 2-1 wet, started getting dirty / dusty 2-2 wet, but cleaner after [...]

Ningbo Aier participated at the CHINA REFRIGERATION EXHIBITION 2019 show, which is one of the world’s professional refrigeration and HVAC (Heating, Ventilation & Air Conditioning) trade fair. The show was held from 9 till 11 April 2019 and was attended by many HVAC professionals and other visitors.

CR exhibitionDuring the exhibition, Aier successfully displayed its HVAC products such as pipe clamps, Iris dampers, access doors, air valves, and swirl diffusers. Our booth has attracted many of our old friends as well as new visitors. Even some non-specialists stood still at our stand. Among all the displayed products, Aier’s iris dampers were the star products at the event. Our iris damper is an ideal regulator of air flow with a measuring device. These types of iris dampers are made of galvanized steel or 316L stainless steel with double [...]


Ningbo Aier Ventilation Equipment Co., Ltd has recently launched another type of its access door series for the ventilation ducts – Flat Access Door.

What is Flat Access Door?

 Flat Access Doors are designed to provide inexpensive and trouble free access to the rectangular air ducts for ducts cleaning and maintenance. The flat access doors are made out of hot-dipped spangle-free galvanized steel (Dx51D+Z275) with polyurethane as the gasket.

Flat Access DoorAdvantages of Flat Access Door?


  • Our flat access doors are anti-corrosion and rust-proof – zinc coated Z275 (16-22 µm);
  • Our innovative handle design allows our flat access doors to be pushed and pulled instead of managed by twisting a knob when installed on the duct. This makes handling the access doors much easier.
  • Last but not least, the polyurethane gasket on the flat access doors greatly [...]
BIG 5 Exhibition

BIG5 Dubai is considered to be the largest exhibition show for the building and construction industry in the Middle East, North Africa and East Asia region. This event has a great impact on the Middle Eastern region for years now and its HVAC section has been attracting more and more attention in recent years. During the four-day exhibition, this event has drawn over 65,000 visitors to see more than 2,500 HVAC exhibitors coming from all over the world. We are pleased to report that we, under our Aier Ventilation brand, were one of the exhibitors at this event and took this opportunity to promote Aier Ventilation’s high quality HVAC accessories to both Middle Eastern and North African markets.

Though this was the very first time for us to participate in the BIG5 show, our expectations were well exceeded by the sheer numbers of the many positive feedbacks and consequential enquiries from our visitors. Our top HVAC [...]

A Story About the Casting Aluminum External Louvre

How Our Casting Aluminum External Louvre Achieved High Quality


How to compete with other suppliers on the market? Answer: differentiation!

Are low prices the most important advantages? Not really.

Differentiation allows us to provide our customers with a superior value at affordable prices, thus creating a win-win situation that can boost the overall profitability and viability of your business.

Take Our Casting Aluminum External Louvre as an example.



A Story About the Casting Aluminum External Louvre


Some time ago, a potential customer was inquiring about our casting aluminum external louvre. He has acquired several offers from other suppliers too, but in the end opted out for a lower priced solution with another supplier. The very same customer came back a few months later and told us that the supplier he had chosen before provided bad quality. Coincidentally, we have decided to do a little research of the market’s supply at that time. Testing and examining several casting aluminum external louvres made [...]

Pic 1

At Ningbo Aier Ventilation Equipment, we continuously work on developing and providing more comprehensive services to our customers in order to fully meet every need they might have. In such spirit, we have also developed plastic air valves and stainless steel air valves to satisfy customers’ diversified specifications.


What are Plastic /Stainless Steel Exhaust and Supply Air Valves?Pic 1

Both Plastic Air Valves (PAV) and Stainless Steel Valves (SSAV) have the same functions as the metal ones. They are designed to offer simple but effective means of providing air supply and air extract for most commercial, industrial and domestic ventilation applications. The only differences in contrast to metal valves are materials used and their construction. The plastic air valves and the stainless steel air valves can be used for both air supply and air exhaust (2 in [...]

What Are The Exhaust And Supply Air Valves?

Air valves are designed to offer simple but effective means of providing air supply and extract capabilities for most commercial, industrial and domestic ventilation applications. They are typically installed in hotels, houses, apartments, halls of residence and hospitals and are being used to handle air volumes in small confined and closed up indoor spaces such as toilets, washrooms, utility rooms, or any other small rooms.



What Are The Metal Exhaust and Supply Air Valves Made Of?
  • The body of an exhaust air valve is made of SPCC steel with thickness of 0.6mm or 0.8mm upon request.
  • The mounting ring of an exhaust air valve is made of DX53D+Z80 hot dipped galvanized steel (plated zinc thickness 6-8mm)
  • The exhaust air valve body has a gasket made of circular [...]
Jhystamping factory 8 - HVAC Accessories - Custom Metal Stamping Parts Manufacturing

Durable high quality products wouldn’t be possible without the appropriate modern manufacturing facilities in place. Here at Yuyao Jingqiao Hardware Factory (also as Ningbo Aier Ventilation Equipment Co., Ltd) we possess all the necessary infrastructure and state of the art machinery & equipment to plan, design, manage and produce some of the best products in the HVAC industry today. From iris dampers, metal disc air valves, ventilation pipe clamps and duct suspension clamps, to duct access doors, tabbed access doors, damper regulators and more, our HVAC accessories & custom metal stamping parts couldn’t be in better hands when it comes to making them.

Our production facilities are formally divided into 7 general sections of the factory. These are:


  • Hydraulic Press Production Line,
  • Progressive Die Pressing Production Line,
  • Robot Arm Transfer Production Line,
  • Laser Cutting Production Line,
  • Robot Welders,
  • Fully Automatic Powder Coating Line,
  • In-house Tooling Workshop,
  • Assembling Lines, and
  • Warehouse.


Iris Damper Range
What is an Iris Damper?

IRIS Damper is an ideal air flow regulator and measuring device for the circular ducts. The diaphragm valve ensures a perfect accordance between the diameter indication on the handle and the opening of the valve. When in a fully open position, the iris damper provides a 100% free area with no control mechanism in the airstream, allowing easy and effective cleaning of the duct.


Advantages of an Iris Damper (compared to the other VOLUME CONTROL DAMPERS) 
  • Precise air flow measuring & regulating
  • Low sound level
  • 100% open to facilitate duct cleaning
  • Air Tightness class C
  • Full size ranges from dia. 80mm to 800mm.


Development History of Iris Damper at Ningbo Aier Ventilation Equipment Co., Ltd

Ningbo Aier Ventilation Equipment Co., Ltd is the FIRST and ONLY manufacturer in China that can produce the full-size ranges of iris dampers from dia. 80mm to 800mm. We have [...]

Factory expansion

We are delighted to announce that we are expanding our production facilities. As a Chinese leading manufacturer of HVAC Accessories & Custom Metal Stamping Parts, Yuyao Jingqiao Hardware Factory (also known as Ningbo AIER Ventilation Equipment Co., Ltd) has invested several millions of euro into a new site in order to increase its production capacities. The new addition to our already existing manufacturing facilities will be located in the same industrial park. It will increase the total manufacturing space of our factory to 25,000 Square meters. The new building will hopefully be finished by the end of this year.

Factory expansion

Metal Stamping Parts
Yuyao Jingqiao Hardware Factory was established in 1997 and began its business by offering Made-to-Order services to customers with their own specific samples or drawings. To meet our customers’ diversified [...]

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