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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 ® ?