Navector Airflow Sieve: Solving Screen Blinding Challenges with Aerodynamic Technology

In powder processing and fine particle screening, screen blinding is a common challenge that significantly affects production efficiency. Easy agglomeration of particles, high electrostatic attraction, and blockage of screen apertures all lead to reduced screening efficiency and extended production cycles. Navector (Shanghai) Screening Technology Co., Ltd. has long been committed to the research and development of screening technologies, among which the airflow sieve demonstrates significant advantages in addressing screen blinding issues during fine powder screening.

I. Principle Overview
The airflow sieve utilizes aerodynamic forces for screening. The equipment can be connected to an air extraction device to create a negative-pressure airflow within the screening chamber. Airflow is injected through nozzles onto the screen surface, placing the powder in a dynamic air environment. Materials smaller than the screen aperture pass through the mesh with the airflow into the lower collection unit, while larger particles remain on the screen surface due to airflow action. The core design regulates airflow intensity and jet velocity, allowing fine and easily agglomerated powders to be screened under gentle conditions without the need for mechanical auxiliary devices.

II. Anti-Blinding Advantages
The airflow sieve effectively prevents screen blinding, mainly reflected in the following three aspects:

• Improved Material Dispersion

The airflow sieve uses aerodynamic forces to keep powders in a dispersed state. Compared with traditional methods that rely on mechanical vibration to drive materials through the screen, the airflow sieve reduces inter-particle adhesion and agglomeration through airflow action, preventing materials from forming clumps on the screen surface and reducing the risk of blinding at the source. This design is specifically developed for the screening analysis of low-density and easily agglomerated fine particles and is suitable for analytical sieves with apertures of 10 microns and above.

• Continuous Screen Cleaning Mechanism

As airflow passes through the screen, it continuously impacts the interior of the apertures, enabling real-time cleaning. During screening, airflow continuously enters the apertures and is drawn below the screen by negative pressure. This flow pattern exerts a scouring force on potential blockages within the apertures, keeping the screen open and ensuring a highly repeatable screening process.

• High Adaptability Through Adjustable Parameters

The airflow sieve can be used with manual or automatic air extraction devices. By adjusting key parameters such as airflow intensity, negative pressure, and jet velocity, it can be adapted to different powders. Adjustable nozzle velocity enables more flexible screening, while controllable screening time significantly improves efficiency and result repeatability. These adjustable features allow the airflow sieve to maintain screen openness when handling powders with varying characteristics.

III. Application Value
The airflow sieve offers practical application value across multiple industries. Its technical characteristics enable outstanding performance when processing fine powders prone to agglomeration. The airflow sieve is suitable for screening operations in pharmaceuticals, chemicals, plastics, rubber, minerals, powder coatings, pigments and colorants, ceramics, food, and other fields.

Screen blinding is a key issue affecting production efficiency and screening stability. By reducing particle agglomeration through aerodynamic principles, keeping screen apertures clean, and enabling adjustable screening parameters, the airflow sieve effectively lowers the risk of blinding. This technology provides a practical and feasible solution for fine powder screening.

With micron-level screening technology at its core, Navector supports industries in achieving efficient screening through customized solutions and a comprehensive service system.