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Pepperl+Fuchs Blog

Configuring the 7500 Series Purge and Pressurization System

Posted by Pepperl+Fuchs on Wed, Jun 16, 2021

The 7500 series is a type Z/Ex pzc purge and pressurization system that enables non-rated electrical equipment to be used in hazardous areas. The 7500 series is a certified system for UL Class I and II/Div. 2 as well as for Zone 2/22 hazardous locations. A complete 7500 purge and pressurization system requires a control unit, a manifold valve, and a vent. It can be configured as a manual or fully automatic system. This blog article shows you how to configure the 7500 system components, i.e. control unit, manifold valve, and vent.

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Topics: Purge/ Pressurization Systems, Hazardous Area Enclosures/ Equipment, Hazardous Locations

How to Prevent Dust Explosions Using Pressurization

Posted by Pepperl+Fuchs on Tue, May 25, 2021

Dust explosion disasters like the one at the Imperial Sugar Company refinery in Georgia, USA, resulted in several congressional hearings in the USA that cited the US Occupational Health and Safety Administration (OSHA) for not enforcing worker protection regulations. As a result, OSHA has since identified at least 30,000 plants in the USA as having potential problems from dust hazards. It is also estimated that around 2,200 dust explosions happen throughout Europe each year. As the industry continues to become aware of this potentially devastating problem, they will need solutions that protect their workers, plants, and the surrounding environments. Read in our blog article, where combustible dust atmospheres may occur and how these could be prevented.

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Topics: Purge/ Pressurization Systems, Hazardous Area Enclosures/ Equipment, Explosion Protection, Control System

Series 6000 Purge and Pressurization Systems replace Series 2000

Posted by Pepperl+Fuchs on Tue, Mar 16, 2021

Unlike containment or prevention, purge and pressurization separates general-purpose equipment from the surrounding potentially explosive atmosphere using a standard, lightweight enclosure. The enclosure is then purged with industrial-grade air or inert gas to eliminate all hazardous gas inside. Then, the flow is decreased to maintain a pressure higher than that of the dangerous external atmosphere. This prevents the flammable mixture from coming in contact with the components inside the enclosure.

Pepperl+Fuchs offers an array of purge systems. The 2000 series is a legacy system that is now obsolete, and its recommended replacement is the 6000 series—the latest Type X purge system from Pepperl+Fuchs.

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Topics: Purge/ Pressurization Systems, Explosion Protection Equipment, Explosion Protection

Why Use a Purge and Pressurization System?

Posted by ISC Sales on Mon, Apr 22, 2019

Specialized protective equipment has to be used in environments that contain gases, vapors, combustible dusts, and fibers to prevent these materials from catching fire or exploding. Purge and pressurization systems help control these explosion hazards by segregating the electrical equipment inside of an enclosure from the surrounding potentially explosive atmosphere. An economical alternative to heavy and expensive explosion-proof enclosures, purge and pressurization systems pressurize enclosures with clean, dry compressed air or inert gas so hazardous gas or dust cannot get in.

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Topics: Purge/ Pressurization Systems

Recognizing and Mitigating Combustible Dust Hazards

Posted by Ryan Brownlee on Mon, Oct 15, 2018

Combustible Dusts are a known hazard in a number of industrial fields. Recognizing dust as a potential hazard and taking the steps to mitigate the risks present are critical to the safety of your facility. The recently updated NFPA® 652: Standard on the Fundamentals of Combustible Dust is a useful resource for addressing combustible dust hazards and conducting a dust hazard analysis (DHA) within your facility.

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Topics: Purge/ Pressurization Systems

Bebco EPS® 4000 Series Purge and Pressurization System

Posted by Andre Clayton on Thu, Oct 04, 2018

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Topics: Purge/ Pressurization Systems

Pepperl+Fuchs in Katy Texas Weathers Hurricane Harvey and a Tornado

Posted by Kristen Barbour on Mon, Aug 28, 2017

On Friday, August 25th, Hurricane Harvey hit the South Texas coast. Consequently, the storm front struck our new manufacturing and warehouse building in Katy, Texas. High wind from a hurricane tornado damaged our roof structure, pulling air handling units from the roof and allowing water to enter the building.

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Topics: Purge/ Pressurization Systems, Industrial Monitors/ HMI, Explosion Protection Equipment

Communicating with Your HazLoc Control Panel

Posted by DJ Haney on Fri, Jan 27, 2017

When installing a purged control panel or industrial HMI in a hazardous location, power supplied to the control panel must be regulated so that components are not energized before the panel is protected by a purge cycle.

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Topics: Purge/ Pressurization Systems, Industrial Monitors/ HMI, Intrinsic Safety

How to Calculate the Maximum Enclosure Size for an Ex pz Purge and Pressurization System

Posted by Brent Dean on Fri, Sep 09, 2016

The maximum size of an Ex pz purge enclosure is determined by the pressure and flow that can be reached inside the enclosure. For this 'how to' post, I'll use our 5500 series purge system for the examples.

Depending on your application, there are three vent options that you can use with your system. The EPV-5500-…-01, EPV-5500-…-02, or EPV-5500-…-03. Each vent opens at a different back pressure and has different flow rates, which are listed below.

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Topics: Purge/ Pressurization Systems

Combining Explosion Protection Techniques to Reach Success

Posted by Alex Dzatko on Fri, Jul 29, 2016

Integrating complex electrical systems and components into hazardous areas typically requires combining different methods of industrial explosion protection to achieve a safe and certified solution. Our Solution Engineering Centers have the ability and the experience as a system integrator for solutions going into Zone 1 and 21 or Zone 2 and 22 areas. Our ATEX and IECEx certificates offer great flexibility, allowing  unique solutions for the challenges of putting complex electrical equipment in hazardous locations around the world.

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Topics: Purge/ Pressurization Systems, Approvals/ Certifications, Explosion Protection Equipment

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