Source Factory | Professional Custom Air Filters, Air Dampers, Air Diffusers, and Operating Room Accessories
1. The purpose of this valve device is to prevent gas from flowing back when the fan stops.
2. The installation range of this valve requires that the wind speed in the air duct should not be less than 8 meters per second.
3. The installation method in this picture is horizontal. Vertical installation does not require a heavy hammer. The installation method should be specified when ordering.
Model | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
D | 220 | 250 | 280 | 320 | 360 | 400 | 450 | 500 | 560 | 630 | 700 | 800 | 900 |
1. The purpose of this valve device is to prevent gas from flowing back when the fan stops.
2. The installation range of this valve requires that the wind speed in the air duct should not be less than 8 meters per second.
3. The installation method in this picture is horizontal. Vertical installation does not require a heavy hammer. The installation method should be specified when ordering.
Model | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
A | 200 | 250 | 300 | 400 | 400 | 500 | 500 | 600 |
B | 200 | 250 | 300 | 300 | 400 | 400 | 500 | 600 |
In ventilation, air conditioning and exhaust systems, if there is no reliable check device, the air may backflow when the fan stops, the pipe pressure changes, or when multiple systems share air ducts, resulting in the backflow of odor, the diffusion of polluted air, the cross-flow of hot and cold air, or the decrease in system operating efficiency.
The check valve can automatically open and close according to the direction of air flow without complex control, which can effectively reduce air backflow and reverse flow problems. It is suitable for use in exhaust, fresh air, air conditioning ventilation, equipment exhaust and industrial ventilation systems. It is an important supporting product to improve system stability and air flow management.
When the air flow is forward, the valve plate automatically opens; when the air flow stops or reverses the flow, the valve plate automatically closes, helping to prevent air backflow.
The product has a compact structure, simple action method, does not require complex electrical control, and is suitable for long-term installation in ventilation duct systems.
It can be used in supply air, exhaust air, fresh air, return air, fan outlet, equipment exhaust and industrial ventilation systems, with a wide range of applications.
The valve plate opens and closes smoothly, and can respond quickly to changes in air flow, reducing the impact of reverse air flow on the system.
Sealing strips, soft sealing structures or reinforced sealing designs can be configured according to project requirements to improve the anti-backflow effect after closing.
Can be made of galvanized steel plate, stainless steel, aluminum alloy, PP or other materials to meet the needs of general ventilation, clean environment, humid environment or corrosive exhaust system.
The air duct can be designed into a rectangular, circular or special structure according to the on-site design, and supports flange connection, plug-in connection or equipment matching installation, which facilitates construction and maintenance.
Can be customized according to customer drawings, duct size, air flow direction, system pressure and installation space to meet the requirements of different engineering projects.
Check valves are widely used in the following scenarios:
Office building ventilation and air conditioning systems
Hotels and shopping malls
Hospitals and medical buildings
Schools and public buildings
Laboratory exhaust systems
Clean room air supply and exhaust systems
Pharmaceutical workshop
Electronic factory
Industrial factory
Basement ventilation system
Equipment room
HVAC construction, renovation and maintenance projects
Mainly used for:
Exhaust system anti-backflow
Fresh air system anti-backflow
Fan outlet non-return protection
Multi-branch air ducts to prevent cross-flow
Air flow control of air-conditioning and ventilation systems
Laboratory exhaust backflow prevention
Clean area airflow Air flow direction control
Industrial waste gas emission system
Prevent backflow at the equipment exhaust port
Prevent odor, polluted air or hot and cold air from flowing back
We support non-standard customization according to customer project needs to meet the actual use requirements of different countries, different ventilation systems and different installation environments.
Customizable content includes:
Valve size customization
Rectangular or circular structure customization
Galvanized steel plate, stainless steel, aluminum alloy, PP or other material selection
Single-piece, double-piece or multi-blade structure
Valve thickness and opening angle customization
Sealing strip, soft seal or reinforced sealing structure
Flange connection, plug connection or equipment matching connection< /p>
Air supply type, exhaust type or special working condition structure
Surface spraying, galvanizing, stainless steel wire drawing or anti-corrosion treatment
OEM / ODM production
Processing according to drawings or samples
Whether it is a general building ventilation project, a hospital purification project, a laboratory exhaust system, or an industrial ventilation and equipment supporting project, we can provide flexible product solutions according to customer needs.
We are familiar with the requirements for air flow direction control, backflow prevention and installation stability of HVAC systems, exhaust systems, clean rooms and industrial ventilation systems, and can provide customers with practical and reliable check valve products.
Can be customized according to customer drawings, air duct size, installation location, air flow direction, material requirements and system pressure, suitable for new projects, renovation projects and equipment procurement.
Made of high-quality materials, the valve body is firm and the valve plate is flexible in action. It is suitable for long-term installation in ventilation ducts.
Reasonable valve and sealing structure design can effectively reduce the reverse flow of air and improve the operational stability of the ventilation system.
Products can be adjusted in packaging, size, material, connection method, surface treatment and logo according to the needs of foreign customers, and batch orders and OEM cooperation are supported.
Quality control is carried out from material selection, valve body processing, valve assembly, action inspection, seal inspection to factory inspection to ensure stable product structure, smooth opening and closing, and accurate dimensions.
We can quickly provide product solutions and quotations based on the dimensions, pictures, drawings, material requirements, airflow direction or project parameters provided by customers.
If you are looking for a check valve or a ventilation and air conditioning anti-backflow check valve, please contact us to get a quote.
In order to provide you with an accurate solution faster, please provide the following information:
Required valve size
Pipe shape, such as rectangular or round
Material requirements, such as galvanized steel plate, stainless steel, aluminum alloy or PP
Use scenarios, such as exhaust system, fresh air system, fan outlet or equipment exhaust
Air flow direction and installation location
Whether sealing strips, spring return or Special sealing structure
Connection method, such as flange connection, plug connection or equipment matching connection
Whether there are anti-corrosion, clean, moisture or outdoor use requirements
Purchase Quantity
Whether customized drawings or OEM services are required
Destination port or delivery location
We will provide professional suggestions, product solutions and quotations based on your needs.
Looking for a reliable manufacturer of air filtration, air distribution, and cleanroom equipment? We provide high-quality products, competitive factory pricing, and flexible OEM/ODM customization services for global customers, meeting the diverse needs of industrial, medical, cleanroom, and HVAC projects.
Address: No. 458 Jiangping Road, Jingjiang City, Jiangsu Province, China
Payment Terms: L/C, T/T, D/P
International Trade Terms: FOB, CFR, CIF, DAP, EXW
Average Lead Time: Peak season: one month; off season: within 15 working days
Nearest Port: Shanghai
Looking for a reliable supplier of air filtration, air distribution, or cleanroom system products? We provide factory-direct pricing, customized OEM/ODM services, and complete engineering project solution support.
Submit your requirements, and our engineering team will provide a dedicated solution and quotation within 12 hours, including detailed product specifications and delivery lead time.
