Hey there, if you’re here, chances are you’ve got an explosion-proof fan you need to store – maybe you’re a maintenance tech stowing one for a rig shutdown, a plant manager prepping for a new project, or just someone who’s got a spare unit waiting for when the old one craps out. As a guy who’s been supplying these bad boys for over a decade, I’ve seen way too many customers mess up storage and end up with a fan that won’t work when they need it most. One time, a refinery client stored a new explosion-proof (EXP) fan in a damp corner of their tool shed, and by the time they pulled it out for a emergency ventilation job, the motor windings were corroded so bad it shorted – cost ’em a week of downtime and a new motor. That’s the last thing anyone wants, right? So let’s break down exactly how to store an EXP fan the right way, no fancy jargon, just real-world tips I’ve picked up. Explosion-proof Fan
First, let’s get one thing straight: explosion-proof fans aren’t your run-of-the-mill box fan. They’re built for volatile environments – think oil refineries, chemical plants, grain silos, anywhere there’s a risk of flammable gases or dust. That means they have specialized parts: sealed motors, explosion-proof enclosures, spark-resistant blades, maybe even grounding cables. Messing up storage can compromise those critical features, so every step matters.
Let’s start with pre-storage prep, because you can’t just toss a fan in a closet and call it a day. First thing: clean it. Dirt, oil, or dust buildup isn’t just messy – for EXP fans, dust can get into the motor housing and trap moisture, or leave conductive residue that could cause a spark when you turn it on later. Here’s how to do it right: unplug it (obviously, even if it’s new), then wipe down the exterior with a dry, lint-free cloth. For stuck-on grime, a tiny bit of mild detergent and water works, but make sure you don’t get water near the motor’s terminal box – that’s the explosion-proof enclosure, and getting water in there can break its seal. For the blades, if they’re metal (most EXP fans use aluminum or steel for spark resistance), use a soft brush to get between the fins – no harsh scrubbing, you don’t want to bend or nick them (a bent blade throws off balance, which can damage the motor later). Also, if it’s got a grounding cable or other wiring, check for frays or cracks in the insulation. If you spot anything, tag it and get it fixed before storing – don’t just hide a defective fan, that’s a fire waiting to happen.
Next, you need to inspect the explosion-proof enclosure specifically. That’s the heart of why it’s explosion-proof – those enclosures are designed to contain any internal explosion so it doesn’t ignite the surrounding area. If the seal is broken, if there are dents that warp the housing, or if the threads on the terminal box are stripped, that’s a huge no-go. Run a quick check: make sure all the enclosure bolts are tight (but don’t over-tighten, that can crack the housing), and wipe the sealing surfaces with a dry cloth to get rid of any dust that could keep the seal from closing properly. If you find damage here, either fix it (your EXP fan supplier can help with that) or don’t store it – you might as well scrap it, because it won’t meet safety codes when you need it.
Now, the storage location. This is non-negotiable for EXP fans. I’ve seen people store them in unheated garages, basement corners, even outside under a tarp – that’s a disaster waiting for a spark. Here’s what you need: first, a climate-controlled, dry space. Temperature should be between 32°F (0°C) and 104°F (40°C) – avoid extreme heat or cold, because extremes can warp metal parts or dry out gaskets. Humidity is the big one – you want relative humidity below 60%. Too much moisture causes corrosion, especially on the motor’s internal windings and the spark-resistant blades. A dry, climate-controlled warehouse is perfect, but if you don’t have that, even a well-ventilated, above-ground storage room with a dehumidifier works. No basements, no tool sheds, no outdoor spots – period.
Then, how you position the fan matters too. Don’t lay it flat on the ground, especially if it’s got a motor – laying it on its side can cause oil in the motor’s bearings to drain unevenly, leading to premature wear. The best position is upright, like it’s mounted on a wall. If you need to stack it with other equipment, put it on top of a solid crate or pallet, not directly on the floor, and never stack heavy stuff on top of it. One customer once stacked a 50-lb air compressor on a spare EXP fan – crushed the blade housing and bent the impeller, so they had to buy a new fan. Dumb, but easy to avoid. Also, keep it away from any chemicals or volatile materials – even if it’s not running, fumes from paint, solvents, or gasoline can seep into the enclosure and damage the internal parts. So store it in a clean, empty space, no other hazardous stuff around it.
Now, protecting the parts that can get damaged. Let’s talk about gaskets and seals first – those rubber or silicone parts that keep moisture and dust out of the explosion-proof enclosure. If they dry out or crack, they lose their sealing ability. To keep them in shape, wipe them with a light coat of petroleum jelly (the plain kind, no added fragrances or chemicals) before storing. That keeps them flexible, not brittle. For the blades, if they’re made of aluminum (most are), cover them with a soft, breathable cloth – not plastic, because plastic traps moisture. Plastic can also leave static, which might cause a spark when you uncover the fan later. And if the fan has a motor air vent (some EXP fans have them for cooling), plug it with a small, dry cotton ball or a piece of breathable tape – that keeps dust and bugs from getting inside. If you skip that, dust builds up in the vent and can block airflow when you use the fan, making it overheat.
What about if you’re storing the fan long-term, like 6 months or more? Then you need to do a few extra steps. First, rotate the impeller every 30 days. That means turn the blades by hand a quarter turn – this keeps the motor bearings from rusting up and the impeller shaft from sticking. If you leave it sitting for months without touching, the metal parts can seize together, and you’ll have to take it apart to free it, which risks damaging the explosion-proof enclosure. Also, for the motor, if it’s got a grease fitting, add a tiny bit of motor grease every 3 months – check the fan’s manual for the right type, because EXP motors use specific grease that doesn’t leave residue. One thing I’ve learned: don’t just rely on the manual – a lot of customers don’t read it, so I always tell my clients to write the grease type and rotation schedule on a sticky note and tape it to the fan. That way, no one forgets.
Another thing to watch for: pests. Mice, bugs, even birds can make a home in stored fans, especially if you’re in a rural area. Mice love to chew on wiring insulation, and a chewed wire is a fire hazard when you turn the fan on. To keep them out, stuff small wire mesh into the air vents (make sure it’s not too tight, so air can still circulate) and seal any gaps around the fan’s base with a thin layer of caulk. No need for poison – mesh works way better, and you don’t have to worry about dead rodents rotting inside the fan.
Now, what about when you’re ready to pull it out of storage? Don’t just hook it up and flip the switch. Do a quick check first: remove any covers, wipe off the gaskets, make sure the impeller still spins freely (no sticking), and check the explosion-proof enclosure for any corrosion or damage. If you did all the storage steps right, it should work like new, but if you skipped even one (like storing it in a damp shed), you might spot that corrosion before it’s too late.
Let me hit on a few common mistakes I see all the time, because those are the ones that get people in trouble. First, storing an EXP fan the same way as a regular fan – that’s a huge error. Regular fans can handle a little dampness, but EXP fans’ critical parts can’t. Second, ignoring the enclosure – I can’t stress this enough. If the enclosure seal is broken, the fan is useless for hazardous areas, even if it looks fine otherwise. Third, using plastic covers – trust me, plastic traps moisture. Breathable cloth is the way to go. And finally, long-term storage without rotating the impeller – that’s how you end up with a dead motor when you need it most.
Now, I’m not here to lecture – I’m just a guy who’s sold these fans for years and has seen the good, the bad, and the ugly of storage. The thing is, when you store an explosion-proof fan right, it’ll last way longer than a regular fan, and you won’t have to drop cash on a new one when you need it. Plus, it’ll keep your worksite safe when you put it to use.
If you’ve got a fan that’s going into storage, or you’re looking for a new explosion-proof fan that’s built to hold up when you need it, don’t hesitate to reach out for a chat. We can answer any questions you’ve got about storage, maintenance, or picking the right fan for your job. We’re not just suppliers – we know the ins and outs of these things, and we’re here to make sure your equipment works when you need it, no surprises.
Roof Ventilator References
- National Electrical Code (NEC) Article 500: Hazardous (Classified) Locations
- OSHA Guidelines for Selection, Installation, and Maintenance of Explosion-Proof Equipment
- Manufacturer’s Technical Manual for Explosion-Proof Ventilation Fans (Generic Industrial Grade)
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