- Oil & Gas Industry
- Petrochemical industry
- Electrical Power Plant
Purge & Pressurization Applications
IECEx, ATEX & INMETRO Certified Purging and Pressurization System for large Electrical Machines
Features
- Global approvals
- Purge flow capacity up to 6,000 Nl/min
- Stable machine pressure with CLAPS technology
- Stainless steel enclosure construction
- Temperature range -20°C to +55°C
IECEx & ATEX certified pre-start ventilation systems for large Ex e & Ex n electrical machines
Features
- Certification to +60°C
- Pre-start ventilation flow capacity up to 14,000 Nl/min
- Remote start options
- Stainless steel enclosure construction
IECEx, ATEX & UL certified purge and pressurisation systems for Zone 1, Class I Div 1 applications
Features
- Global approvals
- Purge flow capacity up to 900 Nl/min
- Leakage Compensation or Continuous Flow
- Stainless steel enclosure construction
IECEx, ATEX & UL certified purge and pressurisation systems for Zone 2, Class I Div 2 applications
Features
- Global approvals
- Purge flow capacity up to 900 Nl/min
- Leakage Compensation or Continuous Flow
- Stainless steel enclosure construction
IECEx, ATEX & FM certified intelligent purge & pressurisation system
Features
- Global approvals
- Purge flow capacity up to 540 Nl/min
- Can be configured as Type X, Y or Z purge
- Leakage Compensation or Continuous Flow
- Stainless steel enclosure construction
IECEx, ATEX & FM certified protection systems for Zone 21/22 & Class II Div 1 & 2 dust applications
Features
- Global approvals
- Pressurisation of enclosures up to 5.5m³
- Stainless steel panel construction
Electrical enclosure protection for dirty and corrosive environments
Features
- Prevents contamination inside electrical enclosures
- Suitable for enclosures up to 7 m³ capacity
- Compact, all-in-one solution
- Simple installation and set-up
- Stainless steel panel construction
Expo offers a wide range of standard purge system flow rates, configurations, and features. Sometimes, however, due to the nature of the customer’s project, our standard purge systems don’t quite match what is required. For instance, the application may be to purge very complex or delicate equipment or to operate in environments with non-standard ambient temperatures.
With decades of experience in designing purge systems, as well as our extremely flexible Mini Purge and Smart Purge hardware platforms, we can work with customers to develop a fully certified custom purge system to exactly suit the end-use.
Here are some examples of recent custom purge system projects:
Project scope:
To develop a special purge system for a Universal Robotics robot arm for a painting application.
Challenges:
- Long purge paths with restrictive geometries, causing a significant pressure drop.
- High leakage rates from articulated “knuckle” joints.
Solution:
Special certified high-pressure Mini Purge with an integral purge gas return loop.
Project scope:
To develop a special purge system for a photovoltaic cell wet process tool with two separate purging functions.
Challenges:
- Space limitations inside the process equipment.
- Potentially corrosive & flammable environment.
- Control interface with process tool software.
Solution:
Twin Mini Purge systems on a custom chassis with Teflon process connections, system interlocks, and special purge flow measurement.
Expo designs and manufactures a wide range of hazardous area electrical enclosures that can be certified for use in both gas and dust environments.
Enclosures are available in 316L stainless steel or painted mild steel, and can be specified to IP54, IP66 or 4X levels of ingress protection.
Depending on the hazardous area and the equipment installed, Expo can certify the completed enclosure Ex p, Ex e, Ex nR or Ex t. In other cases, Expo can either issue a Manufacturer’s Declaration of Conformity (MDOC) or manage the certification process through a Notified Body.
Using standardised building blocks and automated configuration and design tools, Expo’s Fast-Track service can deliver you tailor-made enclosures within weeks.
Expo manufactures the enclosure to your specifications and delivers to you component certified. If this is an Ex p enclosure, then the purge system will already be installed and tested. The enclosure can then be populated at your facility.
For systems using purge & pressurisation, Expo holds populated enclosure certificates for ATEX & IECEx, so it can offer a full certification service on the finished system, giving significant time and cost benefits. For most projects, provided we have received all the required documentation, the final inspection process is quick and straightforward and may not need a site visit by an Expo Certification Engineer.
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.
With Expo’s fully custom process, a dedicated engineer will work with you to develop exactly what you need and agree on a detailed budget and project timeline with milestones. As this is a highly flexible service, we can adapt the plan if your project requirements change.
Depending on the scope, we can work with your team to install and integrate your equipment and hold factory acceptance testing for final sign-off.
After the enclosure is populated and tested, Expo can manage the certification process directly, or work with a Notified Body if the scope falls outside of Expo’s populated certificates.
Certified solutions for the pressurisation of drillers cabins and analyser houses
Features
- Meets NFPA Class I Div.2 & ATEX Zone 2 standards
- Ventilation capacity up to 4,700 m3/hr
- Dual redundant fan option
- Roof, wall and in-line mounting options