Explosion proof HVAC

Technical example: Emergency Safety Shower Cooling

Standards EN 15154 and ANSI Z358.1 specify that emergency deluge water must remain tepid (typically 15–37°C). Pyropress® supplies hundreds of ultra reliable SIL2 explosion proof switches including flow, level and pressure switches to safety shower manufacturers for units that are used in hazardous areas in the middle east.  Explosion proof pressure switches activate the maximum cooling fan speed and provide a safety cut-off if the pressure is outside of the safe range. In addition, an explosion proof level switch for the condensate shuts off the system if, for example, the drain line becomes clogged or the pump fails. 

Technical example: Accommodation and Workplace Cooling

A typical hazardous area application has two pressure switches, one at low pressure at around 0.5 bar, a high pressure at around 30 bar, sitting in the appropriate places in the refrigeration cycle. There can be a third pressure switch set between these levels which is cycling the compressor, set with a larger differential or deadband. Some applications also have a Perseus level switch on the condensate tank, to switch on the pump to drain.

Technical example: Cleanrooms

Cleanrooms rely on stable positive pressurisation to prevent particulate ingress, supported by continuous differential‑pressure monitoring. Filtration is critical: HEPA/ULPA filters must be regularly checked and replaced, as blocked filters disrupt airflow and compromise pressurisation. Monitoring pressure drop across filters helps maintain efficiency and ensures the environment remains controlled, compliant, and contamination‑free.