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Motor Purge

Expo MiniPurge motor systems are designed to purge (flush) potentially flammable gases and vapors from large motor enclosures, and to then maintain a positive internal pressure to prevent re-entry of that flammable atmosphere. These systems are designed and certified to international standards for worldwide application: IECEx, ATEX, INMETRO, cUL. Expo systems incorporates CLAPS (Closed Loop Automatic Pressure System) control, to prevent inadvertent motor tripping through internal pressure fluctuations on start-up or through cooling fan cycles. The motor enclosure is also protected against accidental overpressure through a patented Relief Valve. Generally configured for fully automatic operation, Expo systems have timers (pneumatic or electronic) and output signals to apply and disengage power based on the conditions reported by the purge system. As standard, motor purge systems operate between -20 and +50 DegC, and a Low Temperature option is available for operation down to -50 DegC.

  • D779

    X-Type Motor System Purge for Zone 1, Zone 21. CLAPS: Rapid Purge reduces downtime, Leakage Compensation reduces running costs, Automatic compensation for air pressure prevents motor tripsD779 Motor System Purge
    Purge Type X inert gas or compressed air purge
    Area: Zone 1 Equipment Content: Large Electrical Machines
    Purging Action Leakage Compensation High flow rate during purge. Then compensation for leakage
    Purge Flow Rate 1000 to 1500 Nl/min Purge Time 1 to 99 min
    Mounting Style SS316L Box Mounts externally on the motor enclosure
    Alarm Output Power & Alarm Output on Ex e Terminal Box Ex e IIC junction box. Integral Ex d IIC T6 Power (DPNO) & Alarm (SPCO) switches 4A 250Vac AC15
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  • D771

    X-Type D771 Motor System Purge for Zone 1, Zone 21. CLAPS: eliminates motor trips.  Certified IECEx ATEX INMETROD771 Motor System Purge
    Purge Type X inert gas or compressed air purge
    Area Zone 1 or 2 Dust Protection
    Equipment Content: Medium to large electric motors. Large electrical machines
    Purging Action Leakage Compensation High flow rate during purge. Then compensation for leakage
    Purge Flow Rate 1000 to 1500 Nl/min Purge Time 1 to 99 min
    Mounting Style SS316L Box Mounts externally on the motor enclosure
    Alarm Output Power and Alarm Outputs suitable for connection to intrinsically safe circuits  Volt free, dry contacts
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  • D758

    D758-D771-MotorPurge4

    D758- For the protection of large motors being installed in hazardous locations needed to be fully purge and pressurized

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  • D808

    D795 Control Unit

    D808- For the protection of large motors being installed in hazardous locations needed to be fully purge and pressurized

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  • Pre-Start Ventilation System 3PV

    3PV web

    3PV- Is designed to provide ventilation to the motor prior to the motor being started

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  • Prestart Ventilation Systems 5PV

    3PV web

    5PV- Is designed to provide ventilation to the motor prior to the motor being started

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