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Dust Protection: Pressurization

Install any electrical equipment in a Zone 21/22 or Class II Division 1/2 hazardous area.

Dust Protection units maintain a positive pressure of at least 0.5" water column to stop hazardous dust entering the enclosure. Dust Protection units are:

  • For all enclosure sizes: Expo designed our Dust Protection line for every enclosure size.
  • Certified:
    • ATEX,
    • cFMus,
    • IECEx.
For power-switching devices, please see our range of MIU’s (MiniPurge Interface Units).

  • 1ZDP/BP/**

    Z Type Dust Protection unit for any enclosure depending on leakage, Maintains positive pressure, Back Plate Mount on enclosure wall, minimal piping, for Unclassified equipment in Class 2 Div 2, Zone 22 location. 1ZDP/BP/**
    Purge Type Dust Protection Type Z
    Area: Class II Div 2, Zone 2 Equipment Content: Unclassified
    Purging Action Pressurization only Maintains positive pressure, Compensates for air leaks from enclosure
    Enclosure Size Unrestricted depends on air leakage from enclosure
    Mounting Style Back plate Mounts externally on the enclosure wall. Minimal piping.
    Alarm Output Integral Switch – IS or NI Volt free, Dry contact
    read more
  • 1ZDP/PM/**

    Z-Type Dust Protection unit for any enclosure depending on leakage, Maintains positive pressure, Panel Mount on enclosure wall, minimal piping, for Unclassified equipment in Class II Div 2, Zone 2 location.1ZDP/PM/**
    Purge Type Dust Protection Type Z
    Area: Class II Div 2, Zone 2 Equipment Content: Unclassified
    Purging Action Pressurization only Maintains positive pressure, compensates for air leaks from enclosure
    Enclosure Size Unrestricted depends on air leakage from enclosure
    Mounting Style Panel Mount Mounts externally through enclosure wall. Minimal piping.
    Alarm Output Integral Switch – IS or NI Volt free, Dry contact
    read more
  • 1XDP/BP/**

    X-Type Dust Protection, air pressurization,  unit for any enclosure depending on leakage, Maintains positive pressure, Back Plate Mount on enclosure wall, minimal piping, for Unclassified equipment in Class II Div 1 Zone 1 location.1XDP/BP/**
    Purge Type Dust Protection Type X
    Area: Class II Div 1, Zone 21 Equipment Content: Unclassified
    Purging Action Pressurization only Maintains positive pressure, compensates for air leaks from enclosure
    Enclosure Size Unrestricted depends on air leakage from enclosure
    Mounting Style Back plate Mounts externally on the enclosure wall. Minimal piping.
    Alarm Output Integral Switch – IS or NI or Pneumatic Output Volt free, Dry contact or 2 barg (30psi) signal for Alarm/Pressurized
    read more
  • 1XDP/PM/**

    X-Type Dust Protection, Air Pressurization, unit for any enclosure depending on leakage, Maintains positive pressure, Panel Mount on enclosure wall, minimal piping, for Unclassified equipment in Class II Div 1 Zone 21 location.1XDP/PM/**
    Purge Type Dust Protection Type X
    Area: Class II Div 1, Zone 21 Equipment Content: Unclassified
    Purging Action Pressurization only Maintains positive pressure, compensates for air leaks from enclosure
    Enclosure Size Unrestricted depends on air leakage from enclosure
    Mounting Style Panel Mount Mounts externally through the enclosure wall. Minimal piping.
    Alarm Output Integral Switch – IS or NI or Pneumatic Output Volt free, Dry contact or 2 barg (30psi) signal for Alarm/Pressurized
    read more