Explosion Isolation Flap Valve

Millisecond Blast Wave Self-Locking & Flame Propagation Barrier

Highlights

Passive mechanical operation triggers in milliseconds (< 15 ms) upon pressure wave arrival.
Withstands maximum explosion pressure Pmax up to 13 bar (188 PSI).
Certified for St3 dust hazard explosion ratings (Kst ≤ 400 bar·m/s).
Available in DN100 through DN1000 duct sizes in both one-way and two-way designs.

Performance Features

Passive Mechanical Millisecond Lock-Shut

During normal air flow, the internal flap remains open under counterweight balance; an explosion pressure wave instantly forces the flap closed and locked.

High Pmax 13 bar Heavy-Duty Carbon Steel Body

Robust thick steel casing prevents valve body rupture during severe deflagrations, completely protecting interconnected factory equipment.

Low Airflow Resistance Aerodynamic Flap

Streamlined internal flap geometry minimizes pressure loss during normal dust collection ventilation, saving fan power consumption.

FAQ

What is the correct installation distance between the valve and protected equipment?

The valve must be installed in a straight duct section between 3 and 12 meters from the protected vessel according to ATEX guidelines.