What is a High Precision Bag Filter

Bag Filter August 19, 2025 Multi Bag Filter Housing

A high-precision bag filter is a filtration device specifically designed for the efficient removal of fine particles (typically with filtration accuracy ranging from 1 μm to 50 μm, and in some cases as low as 0.5 μm). It is widely used in applications that demand high purity. Its key feature lies in utilizing high-precision filter bags combined with optimized structural design to achieve deep filtration of fine impurities while maintaining processing efficiency.

Key Features

1. High and Stable Filtration Accuracy

The filter bags are made of ultra-fine fiber materials (such as polyester, polypropylene, PTFE, etc.), capable of consistently capturing particles ≥1 μm; with certain specially designed filter bags, filtration accuracy can reach 0.3 μm.
Compared with standard bag filters (typically ≥50 μm), high-precision bag filters can meet the stringent purity requirements of industries such as electronics, pharmaceuticals, and food processing.

2. Structure Optimized for High-Precision Applications

The filter housing is usually designed with smooth inner walls to minimize dead zones and turbulence, thus preventing secondary contamination.
Excellent sealing performance ensures no bypass of unfiltered materials, guaranteeing reliable filtration results.

3. Balance Between Efficiency and Resistance

Since the micropores of high-precision filter bags are finer, the initial resistance may be slightly higher than that of conventional filter bags (typical operating pressure: 0.1–0.3 MPa).
To address this, the design increases the filter bag surface area or optimizes liquid inlet flow, thereby lowering flow velocity per unit area, reducing resistance, and improving dirt-holding capacity.