Explosion Isolation Barrier Valve

Application Examples

Available Options

Actuator assisted version to protect against slow explosions.

The explosion barrier valve range from Atex includes passive acting, single-direction or bi-direction isolation valves, normally closed by the pressure wave of an explosion. Optional assisted action creates a triggerable fast-acting valve for applications with a risk of fast flame-front propagation.

Features

Stand-alone, passive system - no detection or controller required.
Low-cost maintenance.
Speedy, low-cost reconditioning.
Cost-effective design.

Concept and Operation

This explosion barrier valve is extremely effective in flow areas with low dust concentration in the explosive category 1 and 2 range. They function without external electrical detection and control systems and their unique design allows them to be reconditioned, maintained and reused at exceptional low cost of operation.

The construction uses a valve poppet suspended in the flow area between one or two valve seats. When an explosion occurs, the poppet is thrown against the internal valve seat by the pressure wave moving ahead of the flame front. It then locks into a closed position.

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