Bi-Directional Explosion Isolation Float Valve (VENTEX™) The VENTEX® passive explosion isolation valve is an valve that prevents flame and pressure propagation through interconnected pipelines. The valve poppet is closed by the pressure of the primary vessel explosion. No control and detection is required. The valve can be used to stop the explosion in either one or both directions. Equipped with a spring-loaded poppet, which during a deflagration is pushed against the spring by the pressure wave into a mechanically locked position. Used in vented, suppressed and contained vessels up to 12 barg, and available in stainless steel and gas-tight configurations. Suitable for clean air intake and outlet lines of cyclonic separators, dust collectors, dryers, mills and conveyance systems, and protects against gas, hybrid or dust hazards including organic and metal dust.