Inertial / Sand filters
Filsure inertial filter is compact, self-cleaning, and modular designed, to serve the requirement of high-efficiency dust filtering of large volume of air at lower pressure drop. Inertial separation is an excellent pre-filtration system, particularly indicated in applications with high dust levels such as steel mills, cement factories or desert areas with risk of dust storms.
It is completely steel structured product which separates dust by principle of “Inertia”. If an air flow containing the dust particles or other impurities undergo a direction change, the particles are subject to the force of inertia which makes them follow the direction of the original motion.
This filtration system is based on the kinetic energy conservation principle, for the dust particles transported by the upstream flow; with a series of quick direction changes, the fluid flows are directed towards the area where clean air is needed, whereas the particulate, through inertia, continues to flow towards an area of the filter that exhausts the separated dusts.
Evidently the higher the mass of the particles and the speed through which they are transported, the higher the efficiency of an inertial filter. An inertial filter needs, except for sporadic exceptions, an auxiliary fan for the extraction of separate dusts; this fan, must be suitable for the transportation of abrasive dusts. Our product range includes four types of inertial filters.
The filter is formed by one or more assembled modular inertial cells, through which the dusty air undergoes an acceleration and a sudden change of direction.
The dusts highly accelerated, maintain a rectilinear direction, go inside the cell and are conveyed in a collecting duct.
The separated dust is, then, sucked and ejected by secondary fan or “Bleed fan”. The bleed fan is designed to discharge dust directly in atmosphere, without duct on the outlet. The air consumed by bleeding fan ranges from 10% to 12% depending on efficiency modes (At NTP conditions).
Inertial filter efficiency is dependent on the size and specific gravity of the dust particles, as well as the inlet air velocity and bleed air rate. Large variation in inlet temperature also affect collection efficiency.
Some of the key features and benefits of Inertial filter are:
- High dust handling and filtering efficiency
- Compact and modular design
- Low noise - Sound pressure level less than 85 dB(A) at 1 m. distance
- Wide operating velocity range from 2 m/s to 5 m/s
- No recurring spare parts required
- Removable and individually cleanable filtering panel
- Maintenance free for long-term service in most difficult conditions
- Rugged construction for uniform performance.
- Inlet and outlet side face screen (Optional) for additional protection.
Typical specifications
- Working sound pressure level less than 85 dB(A) at 1 m. distance
- Initial pressure drop less than 250 Pa (For standard inertial filter)
- Dust removal efficiency greater than 81% (A2 fine dust)
- Dust removal efficiency greater than 92% (A4 fine dust)
- Material of construction: Carbon steel painted, Galvanized steel, Stainless steel
- Customized bleed air orientation
We offer two types of high-performance inertial filter solutions, each designed to meet specific project requirements and environmental conditions:
Filspin spin tube separator
The spin tube separator is a self-cleaning inertial filter, consisting of an assembly of small moulded cyclone. spin tubes create centrifugal force to separate dust and debris from the intake air. Integrated with a bleed air fan, the system ensures continuous airflow and effective dust evacuation, making it ideal for high-dust / desert environments and heavy-duty applications.
Following are the features and benefits of Filspin inertial filter:
- Compact and flexible design due to it's moduler concept.
- Designed for durability and efficiency, this solution offers a low total cost of ownership with a long service life.
- The system requires no regular maintenance, as dust is continuously evacuated without manual intervention.
Filvane vane type separator
A vane-type inertial filter is a type of air filtration system that removes dust and other solid particles from the air using the principle of inertia—without using a traditional filter element like paper or mesh.It is engineered to manage high air volumes at elevated velocities while maintaining a consistent airflow resistance throughout operation.
The Filvane Inertial filter is typically considered self-cleaning, as sand and other particles separated from the airflow are collected in a dedicated duct and continuously expelled by a secondary (bleed air) fan. However, in challenging environments—such as marine or salty conditions, high humidity, or sandstorms—it is advisable to periodically inspect the filtering cells and clean them if necessary to ensure optimal performance.
Following are the features and benefits of Filvane inertial filter:
- Capable of handling large volumes of air under extreme conditions, such as desert or dusty environments.
- Requires minimal installation space, making it suitable for space-constrained applications.
- Ensures efficient airflow with minimal and consistent pressure drop.
- Suitable for a wide range of industrial and environmental conditions.
- Designed for durability and efficiency, this solution offers a low total cost of ownership with a long service life.
- Filter elements are reusable and fully recyclable—cleaned rather than replaced—reducing waste and environmental impact.
For more details please refer Inertial filter separator catalogue:
