Combustible Dust and Explosion-Proof Zones 21/22
Combustible dust on site, or a classified Zone 21 / Zone 22 area?
In a classified dust atmosphere, the vacuum itself must not be an ignition source. The explosion-proof series pairs Ex-rated motors and electrics with an anti-static system designed for combustible dust environments. This assessment has the highest priority in any selection — before capacity, before power, before price.
Recommended Models
EHFD-EX series — EHFD22EX through EHFD75EX.
Alternative Options
EHTD-EX series for lighter duty, or the air-powered ERT series (ERTD70 / ERTS30) where a stable compressed-air supply is available.
Recommended Products for This Scenario
EHFD-EX 100L Heavy Duty Industrial Vacuum Cleaner with Explosion-Proof Motor and Pre-Separator
- Power2200 W
- Airflow320 m³/h
- Vacuum22 kPa
- Tank100 L
EHFD-EX 100L Heavy Duty Industrial Vacuum Cleaner with Explosion-Proof Motor and Pre-Separator
- Power3000 W
- Airflow380 m³/h
- Vacuum26 kPa
- Tank100 L
EHFD-EX 100L Heavy Duty Industrial Vacuum Cleaner with Explosion-Proof Motor and Pre-Separator
- Power4000 W
- Airflow410 m³/h
- Vacuum28 kPa
- Tank100 L
EHFD-EX 100L Heavy Duty Industrial Vacuum Cleaner with Explosion-Proof Motor and Pre-Separator
- Power5500 W
- Airflow530 m³/h
- Vacuum32 kPa
- Tank100 L
EHFD-EX 100L Heavy Duty Industrial Vacuum Cleaner with Explosion-Proof Motor and Pre-Separator
- Power7500 W
- Airflow540 m³/h
- Vacuum34 kPa
- Tank100 L
EHTD-EX 70L Industrial Vacuum Cleaner with Explosion-Proof Motor and Anti-Static Kit
- Power2200 W
- Airflow320 m³/h
- Vacuum22 kPa
- Tank70 L
EHTD-EX 70L Industrial Vacuum Cleaner with Explosion-Proof Motor and Anti-Static Kit
- Power3000 W
- Airflow380 m³/h
- Vacuum26 kPa
- Tank70 L
EHTD-EX 70L Industrial Vacuum Cleaner with Explosion-Proof Motor and Anti-Static Kit
- Power4000 W
- Airflow420 m³/h
- Vacuum28 kPa
- Tank70 L
ERTD70 Pneumatic Industrial Vacuum Cleaner Air Operated No Electric Motor
- PowerCompressed Air 5 - 9 bar (approx. 72 – 130 PSI / 0.5 – 0.9 MPa)
- Tank70 L
ERTS30 Pneumatic Industrial Vacuum Cleaner Air Operated No Electric Motor
- PowerCompressed Air 5 - 9 bar (approx. 72 – 130 PSI / 0.5 – 0.9 MPa)
- Tank30 L
IMPORTANT NOTES
Key Reminders
01 Explosion-proof equipment does not mean flammable or explosive materials can be extracted — the material itself must be assessed first.
02 Aluminum powder and magnesium powder cannot be extracted by the current EX series.
03 EHFD30EX / 40EX / 55EX / 75EX hold whole-machine explosion-proof certificate CNEx26.3713X (Ex tb IIIC T130°C Db, AC380V/50Hz); EHFD22EX and other voltages are not covered by that certificate.
04 Stated coverage is IIIA / IIIB / IIIC dust atmospheres, Zones 21/22 — final confirmation always follows the project and certificate.
05 Air-powered machines reduce electrical spark risk but carry no whole-machine Ex certification; the project still requires assessment.
