EXPO MiniPurge Type X Manual
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EXPO MiniPurge Type X Manual

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MiniPurge
Type X
Size 1 Manual
ML 442
Contents
Type X Systems
ML442 | v5k
14-July-17

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  • Page 1: Table Of Contents

     MiniPurge Type X Size 1 Manual ML 442 Contents  1. Specification Sheet – MiniPurge Type X Systems 2. Application Suitability 3. Description and Principle of Operation 4. Installation of the System 5. Commissioning 6. Maintenance of the System 7.

  • Page 3: Specification Sheet - Minipurge

    1/2” NPT Output: 1/2” NPT Signal: 1/8” NPT ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com...
  • Page 4 Action on “Loss of Pressure” = “Alarm & Trip”. Option /AO specifies an “Alarm Only” kit. Action on “Loss of Pressure” = “Alarm & Trip” or “Alarm Only”. LC Model is user selectable. ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011...

  • Page 5: Application Suitability

    The following materials are used in the construction of MiniPurge systems. If substances that will adversely affect any of these materials are present in the surrounding environment, please consult Expo for further guidance. Materials of construction:  Stainless Steel  Aluminium ...

  • Page 6: Description And Principle Of Operation

    3. Description and Principle of Operation  All Expo Technologies MiniPurge pressurization systems provide: a) a method of pressurizing a Pressurized Enclosure (PE) while at the same time compensating for any leakage, together with b) a method of purging the enclosure, before power is applied, to remove any flammable gas that may have entered the enclosure while it was not pressurized, ...
  • Page 7 Figure 3 Continuous Flow Circuit Diagram ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com E: qingdao@expoworldwide.com...
  • Page 8 The lack of any output signal indicates incomplete purge and alarm. In many instances these outputs may be  connected to the Expo range of MiniPurge Interface Unit s (MIU). Figure 5 Typical MiniPurge Interface Unit...
  • Page 9 Safe (IS) circuit which then provides power control or alarm outputs in a safe (unclassified) area. These contacts must only be connected to IS circuits as the switch contacts are in the hazardous area. In many instances these outputs may be connected to the Expo range of ...

  • Page 10: Installation Of The System

    4. Installation of the System  This MiniPurge is designed for use under normal industrial conditions of ambient temperature, humidity and vibration. Please consult Expo before installing this equipment in conditions that may cause stresses beyond normal industrial conditions.  The MiniPurge system shall be installed in accordance with relevant standards, such as IEC / EN 60079-14, NEC 500, NFPA 496 and any local codes of practice that are in force.
  • Page 11 SAU "DP LO (Low) SAU Connection". This connection requires a pipe connection between the CU and the SAU25. ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011...
  • Page 12 “standard” being used. It is the user's responsibility to verify  or enter this data on the PE and/or MiniPurge system nameplate. Ask Expo if in doubt. The IEC / EN 60079-2 permits 5 free volume changes and an example of the calculations is as follows:...
  • Page 13 (no automatic power trip), if the pressure or flow failure persists for an unacceptable time. ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
  • Page 14 If the PE contains an internal source of release of flammable gas or vapour, the procedures for assessment of the release as given in NFPA 496 or IEC / EN 60079-2 should be used. Expo is pleased to provide assistance or consultancy and advice on such matters.

  • Page 15: Commissioning

    Figure 12. Flow Control Valve (FCV) ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
  • Page 16 This pressure may be around 5 mbarg / 2” WC / 500 Pa and will be the "normal working pressure". ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011...
  • Page 17 Turn the air supply on or off to start or stop the system. After this the pressurizing and purging sequence is entirely automatic ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011...

  • Page 18: Maintenance Of The System

    6. Maintenance of the System The maintenance recommended for the system consists of the following items, supplemented by any additional local requirements imposed by the local Code of Practice. Expo recommends that the commissioning tests be repeated at least every six months.

  • Page 19: Fault Finding

    If the system is less than 12 months old, parts under warranty should be returned to Expo for investigation, with a full report of the fault and the system serial number. As with any pneumatic system the greatest enemies are water, oil and dirt in the air supply. For this reason the air system must always incorporate a dust and water filter.
  • Page 20 If this is correct, the sensor diaphragm needs recalibrating or replacing. Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
  • Page 21 Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
  • Page 22 Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com...
  • Page 23 Valve anti-clockwise. MiniPurge to auto-repurge? Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com...
  • Page 24 If this is correct, the sensor diaphragm needs recalibrating or replacing. Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
  • Page 25 Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
  • Page 26 Call Expo ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com...

  • Page 27: Glossary

    Pneumatic Output Relief Valve Spark Arrestor Unit Underwriter Laboratories ML442 | v5k Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com...
  • Page 30 MiniPurge ALARM (RED) ALARM ALARME CONFIGURATION (ROT) (ROUGE) PRESSURIZED PURGING (GREEN) (YELLOW) PRESSURISE DRUCK OK EN BALAYAGE VORSPÜLUNG (VERT) (GRÜN) (JAUNE) (GELB) DIRECT MOUNT (PREFERRED OPTION) NOTES: EN50 016:1977 (BS 5501 pt 3) EEx p II SCS Certificate Ex 94C1052U BS EN50016:1995 (2nd edition) [EEx p] II Sira Certificate Ex99E1002U USE DIRECT MOUNTING WHEREVER...
  • Page 36 If substances that will adversely affect any of these materials are present in the surrounding environment, please consult Expo Technologies for further guidance. This equipment is designed for use under normal industrial conditions of ambient temperature, humidity and vibration. Please consult Expo Technologies before installing this equipment in conditions that may cause stresses beyond normal industrial conditions.
  • Page 37 II 2(3) GD MiniPurge systems are manufactured under Production Quality Assurance Notification SIRA 99 ATEX M043, issued by SIRA Certification Service, Notified Body No 0518. Signed for and on behalf of Expo Technologies Ltd., John Paul de Beer hn Paul de...
  • Page 40 Expo Technologies USA Expo Technologies UK Expo Technologies China Expo Technologies Inc. Expo Technologies Ltd. Qingdao Expo M&E Technologies Co. Ltd 9140 Ravenna Road Unit #3 Unit 2 The Summit, Hanworth Road 329 Huashan Er Lu Twinsburg, Sunbury-On-Thames, Jimo City, Qingdao,...

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