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Data sheet: Pressurized Enclosures Zone 1

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Data sheet: Pressurized Enclosures Zone 1

Certification Overview

Expo holds IECEx & ATEX Certificates to IECIEN 60079-0 & 60079-2, Zone 1, Ex px for populated Expo Purge & Pressurized Enclosures type PE2. The certificate includes for   installation   of the clients’ instrumentation and I or electrical apparatus without further reference to the certification body when it complies with the Expo “Schedule of Limitations”.

For applications where there is a potential for hazardous dust as well as gas, certification can include for Zone 1 & Zone 21. The Zone 21 certification is to IECIEN 61241-4

Industries include: Pharmaceutical, Food,

IECEx &/or ATEX Zone 1 (21) Certification with “YOUR EQUIPMENT”

IECEx • ATEX Certified, Expo Purge & Pressurized Enclosure,Type PE2


IECEx • ATEX Certified Expo Purge &

Pressurization System


YOUR Equipment within agreed limits


Expo Verify the installation is compliant with

the Sol

JECEx &/or ATEX Zone 1 (21) Certification to IEC/EN 60079-0 & -2 Ex px


Where there are Gas & Dust Hazards PE2 can also be certified for both Zone 1 & 21


  • No need for   a Certified I Notified Body as the Certificate has been issued to Expo
  • Accept   orders   for   your   apparatus   in   hazardous locations and increase your market share
  • Ease of Certification for the OEM and the User
  • Reduced Certification cost
  • Reduced time to market
  • After review, equipment not complying with the Sol may still be certified with a variation to the Expo Certificate

Contents of the Enclosure

The construction and power dissipation of the internal components are critical to ensuring effective purging, compliance with Temperature Rating and Safe Operation. Therefore all internal components and details of the PE must be reviewed by Expo Technologies to determine compliance with the IECEx I ATEX   “Schedule of Limitations” (Sol) required for the   certificate to apply. Thereafter the final installation is to be verified by Expo.

Please ask Expo for a copy of the “PE2, Zone 1 Schedule of Limitations”.

Certification of the PE2 Enclosure


Certificate of Conformity: IECEx ITS 08.0044X


Certificate of Conformity No: ITS10ATEX16944X

Ex px IIC T4 Gb             [Zone1]

Ex p IIIC T135°C Db [Zone 21]

Ambient Temp

-20°C, -4°F to 55°C, 131°F

Pressure & Leakage Test

Test result with each PE2

To IEC/EN 60079-2

Over Pressure Test

18mbarg (7″wc)

To IEC/EN 60079-2

Purge Time

10 Volume Changes

Purge Test

Alternatively a Purge Test can be

completed to prove effective purging & reduce the Purge

Compliance to General Conditions IEC/EN 60079-0

Includes thermal conditioning of Non metallic items, seals, etc resistance to light testing impact testing 4 -7 Joules

Schedule of Limitations

Request SoPl E2, Zone 1 (21)

Instruments & electrical

Most apparatus installed within the PE2 are normally acceptable

Ex Apparatus temp

Permitted subject to internal

Effective Purging

Boxed apparatus will require ventilation holes

Power & Signals

Must be disconnected by the MiniPurgeTM system

Temperature Class

T4, T3, T2 dependent on internal and external apparatus


Check with Expo. Small memory type batteries may be able to be installed

Internal releases of flammable gas

Not normally permitted, please consult. Solutions are available


Can be completed at the client’s or Expo premises. Expo will supply the verification document and certificate label(s)


See also MiniPurge Type X systems Data Sheets or go to “Product Wizard”

Common specification

Model Number: PE3 – – – –

PE3 Options:

  • Sizes– Purpose built and designed for the application
  • Maximum Size – 2.1m H x 1.8m W x 1.0m D Approx: 82″ H X 70″ W X 39″ D
    Larger sizes are available, please ask!
  • Material – 1.5mm to 3mm dependent on the size of the PE
    316L Stainless Steel- Finish: NROB
    Mild (Carbon) Steel- Finish: Powder
    Coated RAL7035 (Light Grey)
  • Doors – Front, Back, Side, Top, Bottom or Double doors
  • Door fasteners – Tool Operated ¼turn Stainless Steel (does not require a power disconnect door switch) IEC/EN 60079-2
  • Hinges – Stainless Steel
  • Seals – Elastomer seals fully compliant with IEC/EN 60079-0
  • Windows – Polycarbonate Weather Strip or Clamped
    Laminated Glass Weather Strip or Clamped
    Maximum size up to 1m2 (Approx: 10.76ft2
  • Control Devices & Actuators – Lamps, Push Buttons etc
  • Sub-panel (Chassis): Rear, Slides, Top, Bottom or Door
  • 19″Rack – Fixed or Swing Frame
  • Mount Bosses
  • Label Slots for Bar code Labels or similar
  • Lifting Eye’s
  • Gland Plates
  • Mobile PE2e: Anti-Static
  • Wheels
  • Wall Lugs
  • Free Standing
  • Plinths
  • Keyboards, etc