PPI Engineering’s market leading Purge and Pressurisation safety device ensures the safe operation of electrical machines and enclosures within Zone 1/21 and 2/22 hazardous areas. The unique attributes of this system provide numerous advantages over its competitors.

ATEX Certification
ATEX Quality Assurance Certificate
IECEX Certification

Concept – Refer to brochure for more details

PP1214 is designed in accordance with IEC 60079-2:2014 Ed 6/ EN 60079-2:2007, ensuring a pressurised and leakage compensated enclosure. This creates a non-hazardous atmosphere inside the enclosure by keeping a positive differential pressure between the pressurised enclosure and atmospheric pressure to ensure that no potentially explosive gases enter the electrical equipment.

This type of protection consists of two main stages:

Purge Cycle:

Activated when the electrical machine is OFF prior to being switched ON. Clean air/inert gas is blown through the machine and monitored to ensure compliance with IEC 60079-2:2014 Ed 6/ EN 60079-2:2014.

Leakage Compensation and Pressurisation Cycle:

Once purge cycle is satisfactory the machine is considered non-hazardous and ready to be switched ON. A positive differential pressure to atmospheric has to be maintained. This is achieved by compensating for any air/inert gas leakages that the machine might have.

System Advantages

  • Less pneumatic connections, reducing installation time
  • One size fits all
  • Minimum supply pressure of 3 barg
  • Fully automatic electronically controlled system, reducingcommissioning time i.e. No need to change outlet valve orifice plateto achieve correct flow rate
  • Automatic machine leakage compensation display, which is crucialinformation for machine maintenance
  • LCD information display
  • Up to 4250 ls/min [standard litres per minute] automatic leakage compensation i.e. no additional “BOOST” device needed to increase leakage compensation
  • Local or remote control/monitoring
  • No pneumatic logics used, minimising maintenance and the possibilityof faults, due to leakages
  • Risk of failure minimised due to simplified layout –fewer components needed
PPI214.1.1 Remote Manual Ball Valve *ATEX
PPI214.2.1 Local Manual Ball Valve *ATEX
PPI214.3.1 Remote Automatic Electrical Solenoid Valve *ATEX
PPI214.4.1 Local Automatic Electrical Solenoid Valve *ATEX
PPI214.1.2 Remote Manual Ball Valve *ATEX and IEXEC
PPI214.2.2 Local Manual Ball Valve *ATEX and IEXEC
PPI214.3.2 Remote Automatic Electrical Solenoid Valve *ATEX and IEXEC
PPI214.4.2 Local Automatic Electrical Solenoid Valve *ATEX and IEXEC