Purge & Pressurization Systems

PPI Engineering is an international engineering company specialising in the design, supply and support of rotating machines and associated equipment. We operate an ISO9001:2008 quality system and have an established reputation for technical excellence, quality and reliability. Our team of highly qualified engineers are drawn from the major UK electrical machine manufacturers, with extensive onshore and offshore, mechanical and electrical expertise.

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Market Leading Purge and Pressurisation Safety Device

Purge and Pressurisation safety device ensures the safe operation of electrical machines (Motors, Generators, Compressors etc.) and enclosures within Zone 1/21 and 2/22 hazardous areas.

This 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.

Standard System Advantages

Minimum supply pressure of 3barg.

Fully automatic, electronically controlled system, reducing commissioning time (does not require outlet valve orifice plate changing to achieve correct flow rate).

No pneumatic connections between inlet and outlet unit, reducing installation time.

Automatically compensates varying air leakages in machine, eliminating the need for manual valve leakage adjustment.

Automatic machine leakage compensation display – essential information for machine maintenance.

LCD information display.

Mechanically interchangeable with expo systems.

Up to 4250ls/min [standard litres per minute] automatic leakage compensation already built in, i.e. no additional “BOOST”equipment needed to increase leakage compensation.

Local or remote control/monitoring.

No pneumatic logics used, therefore reducing the possibility of faults created by leakages or blockages.

Risk of failure minimised due to simplified layout – fewer components needed.

With more than 70 years’ experience and deep knowledge of hazardous area standards, Expo Technologies develops and delivers simple, robust, certified solutions that improve safety and save our customers time and cost.

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D758 Motor Purge System (and variants)

The D758 purge and pressurization system delivers purge flowrates up to 6,000 Nl/min and is ideal for medium to large sized Ex p electrical machines.

D808 Motor Purge System (and variants)

The D818 purge and pressurization system delivers purge flowrates up to 1,500 Nl/min and is ideal for medium to large sized Ex p electrical machines.

D818 MotorPurge System (and variants)

The D818 purge and pressurization system delivers purge flowrates up to 1,500 Nl/min and is ideal for medium to large sized Ex p electrical machines.

Fast-Track Enclosures

Using standardised building blocks and automated configuration and design tools, Expo’s Fast-Track service can deliver you tailor-made enclosures within weeks.

Fully Custom Enclosures

Some projects call for special shapes and sizes of enclosures, non-standard features or very special applications, and may also require input from a Notified Body during the design phase or final certification.

Smart Purge II

The SmartPurge II (SP2) is a highly flexible electronic purge and pressurization system suitable for a wide range of flow rates and duties.

Mini Purge Type X

The SmartPurge II (SP2) is a highly flexible electronic purge and pressurization system suitable for a wide range of flow rates and duties.

Mini Purge Type Z (Y)

Expo’s Minipurge type Z range provides a full purge and pressurization solution for electrical enclosures and other equipment installed in Zone 2 or Class I Div 2 hazardous environments.

Areas of Applications

HVAC
Upstream Oil & Gas
Power Generation & Distribution
Chemical & Petrochemical Processing
Automation & Control
Water & Waste Water Treatment
Pharmaceutical Manufacturing
Analysers and OEM Systems

Industrial HVAC & Refrigeration, Chillers, Split Systems

Nucore Group's unrivalled HVAC & refrigeration solutions include heating, ventilation, air conditioning and refrigeration solutions in both hazardous and explosive atmospheres

Pressure, DP & Temperature Gauges, Accessories

The comprehensive product portfolio is manufactured with high vertical integration and state-of-the-art process methods in the company own production sites.