Design Patent Certificate
Stainless Steel Exhaust Pipe
Specification:φ30-φ100(customizable)
Material:SUS201/304
Length:30mm-1m (customizable)
Houses, hotels, restaurants, schools, hospitals, and other establishments frequently utilize wall-mounted boilers because they are extremely effective and energy-efficient heating systems. Wall-mounted boilers produce a lot of combustion exhaust gas when they are operating. To keep interior air pure, this exhaust gas must be vented outdoors via exhaust pipes. Because of their exceptional strength and resistance to corrosion, stainless steel pipe fittings are currently the material of choice for wall-mounted boiler exhaust systems.
Material
Body Material: SUS201 is a low-cost material that could be a good choice for dry indoor uses. On the other hand, SUS304 is a high-grade material that offers great corrosion resistance and is suitable for humid or outdoor environments.
Sealing Material: To improve the airtightness of the door when closed, some versions come with high-temperature-resistant silicone or rubber sealing rings.
Functions
Backflow Prevention: To keep the cold air, smells, pollutants from getting back into the area, the valve closes by itself automatically when the fan is no longer running either by gravity or spring force.
Keeping dust and insects away: The unit does not allow dust, flying seeds, or mosquitoes to come inside the house or the equipment through the drain pipe.
One-way flow means that the air or flue gas in the duct can only proceed in one direction.
Applications
Integrated coff for accurate home ventilation
water dispensers with pressure release exhaust systems, coffee makers, and tiny dehumidifiers.
Fume hoods and small-diameter exhaust pipes for glove boxes are examples of laboratory equipment.
Smart Home:Bathroom exhaust fans, tiny bathroom warmers, and fresh air system terminal devices.
Examples of industrial automation are smoke extraction pipes for laser cutting machines and server rack cooling systems.
Medical Equipment:Compact exhaust terminals for operating rooms or clinics.
Installation
1. Check the Airflow Direction:
The valve body usually features an arrow to indicate which way the air should flow. When installing the valve, make sure the direction of the arrow and the exhaust airflow direction are the same, otherwise, they won’t work.
2. Installation Site:
Horizontal Installation:
In order for a spring or gravity to be able to accurately return the valve plate to the original position, the shaft must be kept horizontal.
Vertical Installation:
Airflow must open the valve plate by pushing it up.
3. Connection and Fixing:
Right after you can install a rigid or flexible pipe that has the correct diameter.
It is better to use stainless steel hose clamps (clamps) to keep the connection stable.
For applications that require a very high level of airtightness, aluminum foil tape can be wrapped around the joint.
4. Space Provision:
Make sure there are no obstructions in the area where the valve plate opens.
FAQ
Q1: What causes the installation noise?
A: In general, this situation happens when a high flow of air causes the valve plate to hit the pipe wall. If you want to reduce the harsh metal impact sound, you may consider putting a buffer silicone strip (optional) on the edge of the valve plate.
Q2: Can you place the check valve horizontally or vertically?
A: Our spring-assisted versions can be mounted at any angle; however, for gravity-driven models, we recommend horizontal or vertical installation with airflow from bottom to top.
Q3: Will the 30mm narrow diameter create an obstruction?
A: Check valves are most commonly used to control clean air or filtered exhaust gas. We recommend that you check the valve plate's sensitivity on a regular basis when there is a lot of dust or sticky oil vapor.
Q4: What are the advantages of custom lengths?
It is also feasible to use a check valve of a custom length (e.g., 500mm or 1m) as a "straight pipe," reducing the number of pipe joints during installation, the possibility of air leaks, and the efficiency of installation.
Technical Strength
To meet the requirements of local and foreign customers, these companies typically go through the process of getting ISO 9001 quality management system certification, and their products are in line with international safety and environmental standards such as CE, CB, and RoHS.
The enterprise puts the spotlight on technological research and development along with strict standards, and it has an excellent R&D team that can make available tailored solutions according to the client's needs.
Intellectual Property: A number of patent certificates, including several utility model patents such as "A Device for Testing Wind Pressure Switches," bear the hallmark of the company's technical competence in product testing and quality management.
Service
We stress product quality and offer extensive after-sales and pre-sales technical assistance. Our company's key priority are to form long-term strategic alliances and provide unique product solutions. We provide our clients with one-stop manufacturing solutions, including product design and prototyping, mass production, and export logistics.


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The air pressure switch is a device in the safety protection measures of the wall-mounted boiler. When the fan stops unexpectedly or the exhaust volume is insufficient due to channel blockage, the air pressure switch will automatically disconnect, thereby ensuring the safe operation of the wall-mounted boiler.
The boiler centrifugal fan is responsible for discharging the exhaust gas generated by the boiler's working combustion state to the outside, while absorbing the required fresh air to provide power for exhaust and ensure the normal operation of the boiler.
When purchasing, pay attention to the brand, quality, performance parameters and after-sales service of the product. At the same time, we can ensure that the quality and performance of the product are more reliable.
We select suitable accessories for you according to the model and power of the wall-mounted boiler to ensure its compatibility and adaptability. In addition, timely technical support and maintenance services are also provided.
You can put forward specific parameter requirements according to your own needs, and we will do our best to customize exclusive products for you.
Yes, if you have an authorized trademark, we can also carry out OEM production to meet your brand expansion needs.
All products provide up to two years of after-sales protection. We will provide you with professional and efficient services to solve any problems you encounter during product use.
We strictly adhere to international trade regulations (such as EU CE, US FCC, and Middle East SASO certifications). We provide product compliance documentation and assist customers with customs clearance, tax, and other issues to ensure smooth order delivery.


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