Duct fan

Overview

The petal-style multi-leaf duct fan is a device that adjusts the airflow into a fan by changing the size of the inlet area at the fan's intake. It features a circular design with multiple fan-shaped blades arranged in concentric circles on the flat surface. By rotating these blades, the valve can effectively adjust the inlet area. All blades have the same angle, allowing for synchronous adjustment during operation. This design simplifies the adjustment process and enhances efficiency.

The ends of the blades connect via linkages or pull rings, allowing the operator to adjust the angle of all blades simultaneously for precise airflow control. Users commonly employ this fan regulating valve in open or semi-open environments. Although the linkages or pull rings are exposed to air and may experience rust and aging, proper maintenance keeps it an effective solution for airflow regulation.

Additionally, the design of the petal-style multi-leaf duct fan regulating valve emphasizes practicality and economy. It provides two structures: standard and sealed types. The standard valve primarily serves an adjustment function and requires use with other isolation valves. In contrast, the sealed valve not only offers adjustment capabilities but also provides isolation. This feature makes it suitable for small-capacity units and eliminates the need for shut-off or isolation valves, thereby simplifying system design.

Overall, the petal-style multi-leaf duct fan regulating valve offers an effective solution for various applications. It achieves precise airflow control through its unique design and functionality.

Technical Parameters

The petal-style multi-leaf regulating valve is an efficient, adaptable, and easy-to-install regulating device, suitable for various industrial and commercial applications. It offers multiple drive options, including electric, manual, and pneumatic. It is equipped with a sealed gas interface at the bearing location, allowing this interface to be connected to a sealing gas source to prevent the leakage of hot gases.

Model: diameter range of DN300-DN2000. It is suitable for large diameter ventilation needs.

Structure: Multi-leaf butterfly valve, flanged connection.

Material: Primarily made of stainless steel, ensuring durability and adaptability.

Packaging: Simple packaging, suitable for mass production, facilitating storage and transportation.

Application Range: Particularly suitable for fan systems, effectively regulating airflow for various fan types, including marine fans, duct fans, boiler fans, air conditioning fans, smoke exhaust fans, and rooftop fans.

What’s the differences between duct fan valve and louver valve？

The main differences between duct fan valve and the louver valve lie in their structure, functionality, and applications.

In terms of structure, the duct fan valve features multiple fan-shaped blades arranged in concentric circles. These blades rotate to adjust the inlet area. In contrast, the louver valve typically consists of multiple parallel flat slats. These slats control the flow and direction by adjusting their angle.

Regarding functionality, the petal-style multi-leaf fan regulating valve primarily regulates airflow by changing the angle of the blades. This makes it suitable for applications that require precise airflow control. On the other hand, the louver valve focuses more on controlling the direction and distribution of airflow. It does this by adjusting the angle and position of the louvers.

As for applications, the petal-style multi-leaf regulating valve is commonly used in systems that require precise airflow control. Examples include HVAC systems and industrial ventilation systems. In contrast, louver valves are widely used in building ventilation systems and door/window designs. They help regulate indoor and outdoor air circulation and temperature control.

In summary, while the duct fan valve and the louver valve differ in structure, both are devices used to control and regulate airflow. The petal-style multi-leaf regulating valve emphasizes precise airflow control, whereas the louver valve focuses more on controlling and distributing airflow direction.