Pepperl+Fuchs Blog

Ask an Expert! Purge Systems - Episode 1

Posted by Andy LaMar on Fri, Jan 17, 2014

When would I choose to use a Type Z purge system over another protection method?

If you have air or some type of inert gas available at your facility and you’re placing general-purpose equipment inside of an enclosure that will be located in a Division 2 location, then I would suggest using our Z purge system.

Type Z Purge SystemsThe most common options for protection in this application would be a Z purge system or an explosion-proof enclosure. An explosion-proof enclosure is a viable solution if you have a single small enclosure. If you have an enclosure with any size to it, a Z purge system would be a more cost effective solution and provide the protection that you need. You can also use one Z purge system to protect multiple enclosures, which is another cost saving option. In this episode of Ask an Expert, we answer customer questions that relate to the Z-Purge system.

Podcast transcript

Hello, this is Andy LaMar with Pepperl+Fuchs. This is another installment of Ask an Expert. Today I am joined by Brent Dean. Brent is our product engineer for purge systems, level control, and corrosion monitoring products. Brent, let's get started with today's questions.

Andy: Alright, the first question asks: "do you have any sort of Z-purge product that would take filtered air from a high-pressure blower at 60 inches water column (60" w.c.) as a pressurization source?

Brent: At 60 inches of water column, that equates to about 2 PSI. Our 1001 A Z-purge system will accept a 5 PSI, or 138 inches of water column supply. But, that is our smallest supply that any of our systems will accept.

Andy: Alright Brent, let's move on to question number 2, and they ask: " I need to purge a 20 cubic foot cabinet containing general purpose equipment in a Class I, Div. 2, Group CD area. I do not want a pressure switch with external power. What solutions do you have?"

Brent: We offer a pneumatic pressure switch certified for Class I, Division 2, Gas groups C and D locations and it requires no external power. You can get this pressure switch on most models.

Andy: Alright Brent, this is the last question for this segment, and this customer is looking for: "a purge system for a Class I, Div. 2 area. Can you help me find one that is suitable for an enclosure of 5.5 cubic feet?"

Brent: For a 5.5 cubic foot enclosure in a Class I, Div. 2 location, this would be a Z purge system. The standard Z purge system we would recommend is our 3003 system, which is suitable for enclosures that have a volume up to 90 cubic feet.

Andy: Alright, well that concludes this segment of Ask an Expert. Again, I want to thank Brent for joining us, and thanks to everyone who submitted questions. If you have a question, please feel free to give us a call, send us an email, or visit our website. Thanks again!

Questions about Purge Systems? Get the Engineer's Guide

Topics: Purge/ Pressurization Systems, Ask an Expert

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