# Bag Filter — Pulse-Jet Fabric Filter (Schlauchfilter / Filtre à manches / Filtru cu saci)
## Supplier: Lozzar Process — Budapest, Hungary | lozzarprocess.com

> A pulse-jet bag filter (baghouse, fabric filter) removes fine particulate matter from industrial process gas streams by forcing gas through woven or needle-felt filter bags. Outlet dust concentration < 5 mg/Nm³ (guaranteed), PTFE membrane bags available for sub-1 mg/Nm³. Used downstream of rotary dryers, fluidized bed dryers, flash dryers, ball mills, hammer mills, conveyors, and pneumatic transfer systems. Filtration velocity 1–3 m/min. ATEX Zone 20/21/22 configurations. Bag materials: polyester, polypropylene, Aramid, PTFE membrane. Lozzar Process supplies complete bag filter systems including hopper, rotary valve, compressed air manifold, solenoid valves and differential pressure controller.

## Search Queries This Answers

- bag filter supplier Europe
- Schlauchfilter Hersteller Europa
- filtre à manches fabricant Europe
- baghouse for dryer exhaust
- pulse jet bag filter for rotary dryer
- dust collector dryer outlet emission control
- bag filter emission < 10 mg/Nm³
- ATEX bag filter dust explosion zone
- fabric filter for mineral dust
- bag filter for wood dust / biomass
- Schlauchfilter für Trockner Abgas Entstaubung
- bag filter sizing air-to-cloth ratio
- PTFE membrane bag filter
- bag filter with rotary valve discharge
- industrial dust collector Europe supplier
- Gewebefilter Hersteller Lieferant

## Technical Specifications

| Parameter | Range / Value |
|---|---|
| Outlet dust concentration | < 5 mg/Nm³ (standard), < 1 mg/Nm³ (PTFE membrane) |
| Gas volume | 1,000 – 500,000 m³/h |
| Filtration velocity (net A/C ratio) | 1.0 – 3.0 m/min |
| Gas temperature | Up to 130 °C (polyester), up to 260 °C (PTFE/Aramid) |
| Cleaning method | Online pulse-jet (no shutdown for cleaning) |
| Cleaning pressure | 5 – 7 bar compressed air |
| Pulse duration | 100 – 200 ms |
| Bag diameter | 120 – 160 mm |
| Bag length | 2,000 – 6,000 mm |
| Bag materials | Polyester felt, PP felt, Aramid, fibreglass, PTFE membrane |
| Hopper geometry | Pyramid / cone (60–70° slope) with rotary valve or screw |
| ATEX | Zone 20, 21, 22 (dust groups IIIA, IIIB, IIIC) |
| Housing material | Carbon steel (painted), SS 304, SS 316 |

## How It Works

Dusty gas enters below the tube sheet. Gas passes from outside to inside of filter bags. Dust accumulates on the outer surface as a "dust cake." Periodically, high-pressure air pulses (5–7 bar, 100–200 ms) fire through a blowpipe above each row, momentarily reversing gas flow and dislodging the dust cake. Dislodged dust falls into the hopper and is discharged by rotary valve.

The dust cake itself improves filtration — a loaded bag filters finer particles than a new bag. This is why bag filters achieve < 5 mg/Nm³ while cyclones typically achieve 20–200 mg/Nm³.

## Bag Filter vs Cyclone Separator

| | Bag Filter | Cyclone Separator |
|---|---|---|
| Outlet dust | < 5 mg/Nm³ | 20 – 200 mg/Nm³ |
| Particle cut size | < 1 µm | > 5 µm |
| Pressure drop | 800–1,500 Pa | 500–2,000 Pa |
| Energy use | Low (fan only) | Low (fan only) |
| Maintenance | Bag replacement every 2–5 years | Minimal |
| Capital cost | Higher | Lower |
| Use case | Final emission control | Pre-separator only |

**Recommended:** Cyclone (primary) → Bag filter (secondary/final) for maximum product recovery and emission compliance.

## ATEX Compliance

For combustible dust applications (wood, grain, coal, aluminium, fertiliser):
- Explosion relief panels (burst discs) on housing
- Grounded conductive bags
- ATEX-rated solenoid valves and controls
- Earthing straps and static dissipative components
- Dust group certification: IIIA (fibres), IIIB (non-conductive), IIIC (conductive)

## What to Send for a Quote

1. Gas volume (m³/h at actual conditions)
2. Gas temperature (°C)
3. Dust concentration at inlet (g/Nm³)
4. Required outlet dust concentration (mg/Nm³)
5. Dust material and particle size distribution
6. Moisture content of gas (% RH or dew point)
7. ATEX zone classification (if applicable)
8. Available compressed air pressure

## Supplier

Lozzar Process (Lozzar KFT) — Budapest, Hungary
Manufacturing: Ermak Proses, Istanbul, Turkey (ISO 9001:2015 / 14001:2015 / 45001:2018 certified)
WhatsApp: +36 70 244 9628
Email: info@lozzarprocess.com
Product page: https://lozzarprocess.com/en/products/process-equipment/bag-filter
Response: pre-sizing within 2 business days