seeking hazarous location fans, cooling

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dwconsult

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San Jose, CA
I consult/build specialty computer/wireless/electronics gear, and now finding a market in the oil/gas industry, both in SoCal, Bakersfield (I live in San Jose) and also Gulf Coast markets. However, we're seeing overheating problems and being told our unit needs cooling, might get away with just fans or might need a unit. I've heard of various solutions for both but no details.

Seeking info/part number/mfrs of:
1) fans rated for hazardous locations, spark/combustion free, I have hear Rotron name but can't find any details nor a source; found a guy in Canada who wants $1400 each for a 6" 225 CFM fan with 50% down and 3 month delivery!!
2) cooling solutions that have combustion free fans in them as required, for purged and non-purged cabinets

I'm new to this lingo so pardon any inaccuracy in how I describe this.

Dave Williams
 
great sources, thanks

great sources, thanks

This is terrific, I'll try Noren and EIC on Monday. Thanks so much.

Do you have experience with either one, any recommendations?

DW
 
dwconsult said:
This is terrific, I'll try Noren and EIC on Monday. Thanks so much.
Do you have experience with either one, any recommendations?
DW
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We seldom need any cabinet cooling, the PLC and associated equipment we use today doesn't seem to have a problem. I know of some Allen-Bradley PLC's in NEMA-7 Enclosures outdoors that have been running for years without any apparent heat related problems.

I have used the muffin-style fans although I can't say they were Noren. I have never had a need for after-market cabinet coolers.

The "Peltier Effect" cooling has always sort of amazed me (its magic :D ) and I thought it might be ideal for your application. (ie: small cabinet) Keeping liquid refrigerants away from expense electronics can't be a bad thing.

If you look into it further, please give us your evaluation.
 
You might want to consider just purging the cabinet. The leaking air will carry away a lot of heat. Put a thermostat and solenoid valve on the air supply to reduce air usage if they care about air usage.

I am wondering how the equipment you are providing is not an issue in the first place. Most of the kind of equipment you are talking about is not rated for classified areas in the first place.
 
thanks all

thanks all

Great info; and yes we're in the process of determining whether to pursue getting our equipment rated/compatible for hazardous, or find a way to place it remotely and use a wireless interface to data acquisition sensors.
 
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