Expo’s MiniPurge dust systems provide a pressurization only protection solution for electrical enclosures and other equipment installed in Zone 21/22 or Class II Div 1/2 hazardous environments.

International standards require that the enclosure is first cleaned to remove any accumulations of dust prior to operation. Once the enclosure is free of dust and sealed, the MiniPurge DP can be started. After successful pressurization, the equipment can be energised either automatically or manually, depending on the hazardous area requirements.

The system comprises:

• Control Unit (CU) – The CU contains the pneumatic logic to monitor and control air pressure and provide the system outputs.

• Relief Valve (RLV) –provides over-pressure protection to the enclosure