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Dust Collection

Reverse Air
Cleaning System

Low-pressure reverse flow baghouse technology that gently cleans filter bags without high-pressure bursts — protecting delicate media, extending bag life, and reducing maintenance frequency.

Gentle Cleaning EPA Compliant Longer Bag Life
GPC reverse air dust collector installed on site with ductwork and fan unit

What is it

Reverse Air Baghouse — Gentle, Low-Pressure Dust Control

GPC Reverse Air dust collectors (often called a reverse flow or reverse air baghouse) is another type of industrial air pollution control device used to remove dust from gas streams using fabric filter bags and cleaned by reversing the airflow. It sends a low-pressure airflow in the opposite direction to normal filtration.

Dust-laden air enters the collector, and as air flows from outside to inside of the fabric bags, dust particles collect on the outer surface of the bags, forming a dust cake. Clean air exits through the inside of the bags.

Cleaning takes place by isolating a compartment (section) from the main airflow. A fan or reverse air system gently blows clean air in the opposite direction (inside → outside). This reverses the airflow through the bags. The bags collapse slightly, loosening the dust cake. Dust falls into the hopper below for removal. Unlike pulse jet systems, this is a low-pressure, gentle cleaning process.

Why Choose GPC Reverse Air?

  1. Gentle cleaning: Unlike pulse jet systems, it does not use high-pressure bursts. This reduces fabric wear, bag damage, and delivers longer bag life.
  2. Longer bag life: Bags last longer due to less mechanical stress and fatigue.
  3. Lower maintenance frequency: Resulting in fewer replacements and repairs.
  4. Suitable for certain dust types like:
    • Fibrous dust
    • Light, fluffy dust
    • Dust that forms a stable cake
Reverse air baghouse cutaway — envelope bags, traveling reverse-air manifold and hopper discharge
Baghouse cutaway
99%+ Filtration Efficiency
Low Cleaning Pressure
2–3× Longer Bag Life
5+ Industries Served

Technical illustrations

How Reverse Air Cleaning Works

Reference diagrams from GPC client documentation.

Reverse air baghouse cutaway — envelope-shaped bags, traveling reverse-air cleaning manifold and hoppers
Reverse air baghouse cutaway diagram
Reverse air dust collector installed on site with ductwork and fan unit
Field installation

Model selection

Reverse-Air Blow Dust Collector Selection Guide

Industrial models and specifications — airflow capacity, filter area and reverse-air blowing across the GPC range.

GPC Reverse-Air Blow Dust Collector Selection Guide — model series GPC-RAC through GPC-RAP-3

Capacities are approximate and vary by application. Contact us for precise sizing — 1300 131 944 or request a quote.

Operating Principle

How the Reverse Air Cleaning Cycle Works

A gentle reverse flow of clean air collapses and flexes the filter bags — dislodging accumulated dust without the stress of high-pressure pulse bursts.

01
Dust-laden air enters the collector
Contaminated air is drawn into the reverse air baghouse. Gas flows from outside to inside through cylindrical fabric filter bags, depositing particulate on the outer surface.
02
Dust cake forms on outer bag surface
Particles accumulate on the outside of the filter bags, building a dust cake. Clean filtered air exits through the inside of the bags and is safely discharged to atmosphere.
03
Compartment is isolated from main airflow
When cleaning is triggered, damper valves isolate a compartment (section) of the baghouse from the main filtration airflow — no full system shutdown required.
04
Reverse airflow gently cleans the bags
A fan or reverse air system gently blows clean air from inside to outside. This reverses airflow through the bags, causing them to collapse slightly and loosen the dust cake.
05
Bags flex — dust cake dislodges into hopper
The gentle bag collapse cracks and loosens the accumulated dust cake. Dust falls away from the bag surface and drops into the collection hopper below for safe discharge.
06
Compartment returns to normal filtration
The cleaned compartment is re-opened to normal filtration flow. Other compartments continue filtering throughout the cleaning cycle — minimising any production impact.

Applications

Industries Served

Reverse Air Systems are the preferred choice for operations handling fibrous, light or fluffy dust types where gentle cleaning protects the filter media.

Timber & Sawmills
Ideal for fibrous wood dust and fine sawdust that forms stable cakes on filter bags.
Textile Industry
Gentle handling of lightweight fibre particles without damaging delicate filter media.
Agricultural Processing
Control of grain dust, chaff and light fluffy particulates from processing operations.
Pharmaceuticals
Gentle particulate control for sensitive powders requiring low-stress cleaning methods.
Food & Flour Milling
Safe capture of fine flour and food-grade dust with gentle cleaning for hygiene compliance.
Paper & Pulp
Fibrous paper dust and pulp particulates handled without bag damage or media fatigue.
Chemical Processing
Low-pressure cleaning for reactive or moisture-sensitive dusts in controlled environments.
System Components
We supply, service and retrofit complete Reverse Air systems including:
  • Woven fabric filter bags
  • Filter bag support cages & retainers
  • Reverse air fans & ductwork
  • Compartment isolation damper valves
  • Pressure differential controllers
  • Sequence control panels & timers
  • Hopper & dust discharge systems
Key Benefits
Why Reverse Air cleaning is ideal for certain dust types:
  • Gentle cleaning — significantly reduces fabric wear and bag damage
  • Extended bag life — 2–3× longer than pulse jet systems
  • Lower maintenance frequency and fewer replacements
  • Ideal for fibrous, light and fluffy dust types
  • Handles dust that forms stable, adherent cakes effectively
  • Lower operating noise — no high-pressure pulse firing
  • EPA & Australian compliance ready

Maintenance & Support

Preventative maintenance keeps your reverse air system performing efficiently and extends the life of your filter media.

Damper valve inspection
Pressure drop monitoring
Bag condition audit
Fan & ductwork inspection
Controller calibration & sequencing
Emergency breakdown support
Why Galaxy Services?

We don't just supply components.
We engineer systems that perform.

We assess your dust characteristics, airflow requirements and fabric media compatibility so your Reverse Air system is correctly sized, properly sequenced and fully compliant. Not every dust suits pulse jet — we'll recommend the right technology for your application.

Book a System Assessment
Site evaluation, system sizing and performance audit.
Contact Us