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BS&B · Explosion Isolation Valves

Ritec partner

BS&B ESI-P external activated isolation valve

Active explosion isolation valve, DN100 to DN600, closed by external energy on a detector signal. Its special operating mode also gives effective protection against fires propagating through the duct.

The ESI-P is an actively operated isolation valve that closes on command from a detection system, using external energy rather than the explosion pressure. That independence from the pressure wave means it can be positioned flexibly in the duct and closes just as reliably against a slow-developing fire as against a fast deflagration.

This dual role is its strength. Combined with spark or flame detection, the same valve stops burning material and smoke from reaching the workplace, and combined with pressure detection it isolates an explosion. It is a natural partner for the SparkEx and Type IPD systems.

Selection data we need

Duct size and airflow, the hazards to isolate (fire, explosion or both), detection already present, dust data (Kst, Pmax), and hazardous area classification.

Applications

  • Ducts between dust collectors and production areas
  • Systems with both fire and explosion risk
  • Lines where the flow direction can reverse
  • Integration with spark detection

Models: Explosion Isolation Valves

BS&B

BS&B Ventex explosion isolation float valve

Passive explosion isolation valve for ducts DN100 to DN600: the pressure wave of an explosion drives a float against its seat and locks the duct, in one or both directions, with no external energy.

BS&B

BS&B Saf-t-Flap explosion isolation flap valve

Passive flap valve for inlet ducts of dust collectors, DN100 to DN1350: held open by the airflow, slammed shut and latched by the explosion pressure. No detection or control needed; combinable with venting and suppression.

BS&B

BS&B Redex RSV-D active isolation slide valve

Fast-acting slide valve, DN50 to DN500, closed by a gas generator on a signal from explosion detection, protecting conveying and product lines against explosion propagation.