Coalescing Filters

Model: 2906700300

Filter Grade: DD Coarse Primary Pre-filtration

Filtration Precision: 1 μm solid particles, bulk condensed water & large oil droplets

Residual Oil Aerosol at Outlet: ≤0.5 ppm under nominal rated flow

Filter Media: Multi-layer gradient borosilicate micro glass fiber composite with hydrophobic & oleophobic surface coating

Rated Airflow: 520 m³/h

Max Working Pressure: 16 bar / 232 PSIG

Max Continuous Operating Temperature: ≤80℃

Key Product Features

Front-line System Barrier Protection

As the first-stage filtration module of compressed air purification system, it intercepts pipeline rust, scale, industrial dust, massive condensed water and bulky oil droplets. It drastically reduces pollutant load on downstream PD high-efficiency coalescing and UD activated carbon filter elements, extends their service cycle and prevents early contamination of desiccant inside refrigerated air dryers.

Low Pressure Drop Energy-saving Design

Optimized deep pleated glass fiber media expands effective filtration area remarkably. It maintains stable low airflow resistance under long-term 24-hour full-load continuous operation, cuts extra power consumption of air compressors and lowers overall plant air supply operation costs.

Extra Large Dirt & Liquid Holding Capacity

Multi-gradient layered depth filtration structure stores massive separated water, lubricating oil and solid contaminants, prolongs maintenance intervals and reduces production downtime for filter replacement.

Perforated Stainless Steel Inner Support Cage

Resists impact of high-speed airflow, prevents filter media collapse, deformation and fiber shedding, and eliminates secondary fiber contamination of clean compressed air, suitable for heavy-duty continuous industrial working conditions.

Working Principle

Raw unpurified compressed air flows into the filter cartridge from the outer mesh layer. The outer coarse fiber layer captures large solid particles, liquid water and bulky oil droplets; minor oil mist is pre-coalesced into heavy liquid droplets that sink to the housing bottom drain port and discharge automatically via gravity. Primarily purified compressed air flows into the secondary PD coalescing filter for further deep oil removal.

Application & Industries

Serves as the first-stage coarse protective filter in large-flow compressed air purification systems, installed upstream of PD coalescing filters and refrigerated air dryers.

Widely used in heavy machinery manufacturing, automotive production lines, packaging printing, textile factories, general spray painting, large pneumatic tool stations, food & pharmaceutical processing, medium & large laser cutting and factory centralized high-flow compressed air supply systems.