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DOWNLOAD A FREE COPY OF “EXPLOSION PROPAGATION
MYTHS & REALITIES” AT FIKE.COM/VALVEX
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Working mechanism No airflow
Deflagration pressure wave
causes fast closure of the valve
Airflow causes the flap to open
The Problem: Explosions Do PropagateCombustible dust explosions occur often in the processing
industry, especially within industrial plants that process powders
because approximately 70% of these powders are combustible.
Past incidents and empirical data clearly reveal dust explosion
propagation in industrial-scale piping is a reality, and the initial
explosion often results in a secondary explosion. The most
devastating dust explosions on record happened when the
initial deflagration propagated and strengthened through
interconnected ducts or pipes, causing widespread damage and
numerous deaths.
The Solution:Explosion Isolation
Explosion isolation devices stop the explosion from
propagating through connecting ducts or pipes.
Many types of explosion barriers exist: chemical vs
mechanical barriers, active vs passive valves.
Passive explosion isolation valves do not require detection
control nor actuators to fulfill their safety function.
The Fike ValvEx ® passive explosion isolation flap valve
is specifically designed, built and tested to isolate the
explosion flame and pressure from dust collector equipment.
Primary ApplicationDust Collectors
Industries Wood • Chemical • Power Food & Beverage • Pharma
Dust Collector
1. AERODYNAMIC DESIGN
• Low pressure drop
• Energy savings
• Limits dust drop out
• Suitable for high dust loads
2. EXTENSIVELY TESTED IN REAL CONDITIONS
• Proven to work in practice, not just theory
3. HYDRAULIC LOCK
• Self-regulating to prevent unnecessary
locking during normal operation
4. SELF-RESETTING
• No need to unlock equipment after
an explosion
5. AIR PURGE
• Dust concentration >70 g/m3
• Flow velocity <15 m/s
6. ATEX & NFPA 69 COMPLIANT
Why ValvEx ® ?