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New explosion isolation valve isolates dust collector explosions

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article image The Stinger explosion isolation valve prevents a dust collector explosion from travelling back through the inlet pipe into the workspace

Camfil Farr Australia announces a new range of explosion isolation valves designed to isolate dust collector explosions in industrial environments.

Stinger explosion isolation valves, available from Camfil Air Pollution Control (Camfil APC) are designed to isolate dust collector explosions to prevent the resultant deflagration from travelling back through the inlet pipe of the dust collector into the workspace. Extensive testing by an independent testing agency has confirmed Stinger’s compliance with NFPA standards.

The US-made explosion flap valve can be retrofitted onto most dust collection systems including new or existing Farr Gold Series dust collectors in any environment at risk of a combustible dust explosion.

A patent-pending lightweight composite blade in the Stinger reacts with the highest possible speed in the event of an explosion in the duct collector, closing faster than the heavier steel blades typically used for dust collector inlet protection. The lightweight design requires a lower pressure drop to hold the blade open during normal flow, saving on energy. Another advantage comes from the blade’s composite construction that creates a smooth surface, preventing any build-up of dust that can compromise performance.

During normal operation, the airflow holds the blade open. However, in the event of a deflagration in the dust collector, a pressure wave will travel through the pipe faster than the flame front and close the flap valve, protecting downstream personnel and equipment from injury and damage. A latching mechanism keeps the valve fully closed, preventing the transmission of flame as well as smoke, dust and burning debris through the inlet pipe into the factory.

Only the blade needs to be replaced if required, and not the entire valve following an explosion event. A wear-resistant liner will indicate when the blade needs to be replaced.

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