Dust Protected Enclosures Ex tb Ex tc Class II Zone 21 Zone 22 ATEX Hazardous Areas

Dust Protected Enclosures

Dust Protected Enclosures

Dust Protected Enclosures

Ex tb Ex tc Enclosures

Ex tb Ex tc Class II Zone 21 Zone 22 ATEX Hazardous Areas 

IECEx – ATEX Certified, Expo Dust & Protected by Enclosure, Ex tb (Type PE2E) or Ex tc (Type PE3E)

Dust protected enclosures hold IECEx & ATEX Certificates to IEC/EN 60079-0 & IEC/EN 60079-31 and EN 61241-1,ATEX hazardous area Zone 21, Ex tb or Zone 22, Ex tc for the populated Dust Protected Enclosure type PE2E/ PE3E.

The Ex tb tc enclosures for explosive atmospheres are designed to prevent the entry of flammable dust into the enclosure – custom designed and engineered for specific application or project.

The construction and power dissipation of the internal components of the dust protected enclosures are critical to ensuring effective purging, compliance with temperature rating and safe operations.

All internal components and details must be reviewed with the consultation of Thorne & Derrick to determine compliance with the IECEx / ATEX “Schedule of Limitations” required for the certificate to apply.

See also complete ranges of  ➡ Hazardous Area Enclosures | Zone 1 Enclosures | Zone 2 Enclosures | Ex d Flameproof Enclosures

Dust Protected Enclosures

Features & Benefits

  • IECEx – ATEX Certified. Dust & Protected by Enclosure, Ex tb (Type PE2E) or Ex tc (Type PE3E)
  • IECEx  ATEX Zone 21 & 22 Hazardous Area Certification to IEC/EN 60079-0 & IEC/EN 60079-31 or EN 61241-1, IP6X, Ex tb/Ex tc
  • No need for a Certified/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 – short lead time enclosures
  • After review, equipment not complying with the SoL may still be certified with a variation to the Expo Certificate
  • Passive operation, no external electric control system or air supply required

Dust Protected Enclosures

Model Number PE2E or PE3E


  • Sizes: Enclosures 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
  • 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 1/4 turn Stainless Steel
  • Hinges: Stainless Steel
  • Seals: Silicone seals fully compliant with IEC/EN 60079-0
  • Windows: Laminated Clamped Glass Maximum size up to 1m(Approx: 10.76ft2)
  • Control Devices & Actuators: Certified Lamps, Push Buttons etc.
  • Sub-panel (Chassis): Rear, Sides, Top, Bottom or Door
  • 19″ Rack: Fixed or Swing Frame
  • Mount Bosses
  • Lifting Eyes
  • Gland Plates
  • Mobile PE2E/PE3E: Anti-Static Wheels
  • Wall Lugs
  • Free Standing
  • Plinths

More Hazardous Area Products | Lighting | Plugs | Isolators | Control Panels | Junction BoxesMotor Starters

Exp Enclosures - Pressurized Enclosures Certifications

Ex tb Ex tc Enclosures – Dust Protected Enclosures Certifications

Certification of PE2E or pe3e Dust Protected Enclosure

Should you require any technical support to enable the design, specification or customisation of dust protection enclosures for explosive dust (Zone 21 & Zone 22) explosive atmospheres please contact our Hazardous Area Sales Team.

IECEx: Certificate of Conformity: IECEx ITS 08.0044X
ATEX: Certificate of Conformity: ITS1OATEX16944X
Ex tb IIIC T135°C Db Hazardous Area Classification
IECEx: Certificate of Conformity No: IECEx ITS11.0042X
ATEX: Certificate of Conformity No: ITS11ATEX17381X
Ex tc IIIC T135°C Dc Hazardous Area Classification
Ambient Temperature-20°C, -4°F to 55°C, 131°F
IEC/EN 60529 & IEC/EN 60079-0
IP66 Ingress Protection
Compliance to General Conditions  IEC/EN 60079-0Includes thermal conditioning of Non metallic items, seals, etc, resistance to light testing, impact testing 4 -7 Joules
Schedule of LimitationsRequest SoL PE2, Hazardous Area Zone 21 (22)
Special Conditions of Safe Use
Before closing the door dust must be removed from the inside of the enclosure and then power can be applied
Instruments & ElectricalMost apparatus installed within the PE2 are normally acceptable
Ex ApparatusPermitted subject to internal temp
Effective PurgingBoxed apparatus will require ventilation holes
Power & Signals InputsMust be capable of being manually disconnected
Temperature RatingT135, T200, T300 dependent on internal and external apparatus
BatteriesCheck with T&D. Small memory type batteries may be able to be installed
VerificationCan be completed at the client’s or T&D premises. T&D will supply the verification document and certificate label(s)
Exp Enclosures Hazardous Areas

Ex tb Ex tc Enclosures Hazardous Areas | Ex pxEx pz | Dust Protected | Increased SafetyRestricted Breathing