Maintenance of an AirPrep air dryer

BlastOne’s Master Technician, Kerry Cooper, discusses the maintenance of an AirPrep air dryer

This whole unit in its operational function, you’ll crack that valve at the bottom that. Now, there and let any excessive moisture be dispensed ated through the vents on the bottom of those

So, it’s important I maintain the right amount of air that the compressor has a capacity to deliver to me. Just remember to if I cracked that all the way open and cracked all the way. I’m simulating another exit of air so I could be simulating another blast nozzle losing excessive air and the last thing I need to lose is excessive air if my two compressors are working to the capacity.

So, you only need to have them weep to let the moisture out. So, as far as this unit’s functionality is concerned, that does a lot of things. It just sits here and looks at you like that, but ultimately, it’s an accumulator. It cools the air make sure the moisture is displaced in such a manner that it doesn’t impede the operation of the equipment that I’m trying to utilize and don’t forget that, as far as this regulator is concerned, to run this air motor there is a lye solution valve on the back of this.

Now, with any pressure vessel. there must be a relief valve on this particular unit. There’s a relief valve over the back here. The relief valve is it compromised by anything by moisture and so forth, it’s serviced every 12 months so because it’s a brass housing that will be with no air.

In this particular unit that will be removed from the top of the vessel inspected clean make sure the seats are correct and so forth and replaced. We always use thread tape on any fittings that we use here, primarily because, we don’t want air escaping or leaks.

The other thing to remember, if you don’t put thread tape on these and you have moisture escaping here that’s coming through a small hole, so ultimately, the thing will get hot. So, you leave yourself susceptible to burns and also to impregnation of your skin with that excessive air that may be escaping from those areas.

So, the safety aspect of these things is paramount importance, not to be overlooked, always to be adhered to. It’s written in your JSA. So, if it’s written there, you adhere to it. So, primarily the function of this particular unit is to receive call, dispense a tear after you’ve used this particular unit for six to twelve months.

If you have a compressor that’s in poor repair and making oil pushing oil up into these particular lines, what you will need to do is there’s a hand hole in this particular unit in that there’s bungs bung in the top. All these fittings need to come out and the tap that’s on the bottom of this unit is unscrewed.

So, what you’re doing is you’re removing any fittings that are on this particular unit making sure it’s isolated with no air on it and then we use something like a hot wash unit. So, every short 12 months or a lot sooner than that. If you compress this making oil, you will evacuate this particular pressure vessel by ways of putting a hot wash in there and you’ll be washing, poking the one in there.

In washing this particular unit, you must wear the appropriate PPE. You must wear glasses. You must wear a face shield. Advisor wear earmuffs because the noise of the nozzle poked around there.

How much pressure would I need 20,000 30,000 psi? No, 1,200 psi hot water. There’s more than adequate to wash, cleanse the stainless steel mesh that I spoke of in there and also to wash the walls.

Would I need to recover the water that I wash out of there? Yes, because it may be oily.
So, I’ll make sure that I capture the moisture that’s released from the bottom of this pressure vessel because I’m hot washing. The thing is that the maintenance that’s required.

Also, at that period of time when I wash it out, I check ball valves for their seat can con
centricity around the ball the seals so the taps the handles. Make sure they’re nice and tight. Any gaskets that I may remove because ultimately when you wash this, you will need to take this three return line or the feed line primary feed line into the receiver. You’ll need to take that off now.

Underneath those flanges, there is a clean go right gasket. It’s made of Klinger I to cope with the temperature of the air if it does exceed any temperature and also, it’s designed to the Klinger I. Guess it’s designed to have a configuration in such a way that it copes with the pressure . So, when I remove those flanges and undo those series of bolts to evacuate this particular unit of any oil water and so forth. I’ve checked the repair of those Klinger right gaskets if they need replacing.

Ultimately, you’ll cut some more or you’ll ring the supplier and say, “can I have some more gaskets for this particular unit?”.

So, the gaskets in these particular fittings, as well, they’re checked. To be quite honest with you, every time you undo these units. So, every time I undo this hose I’ll check those gaskets for good repair. It’s a paramount importance that they are checked daily. If they’re removed to ensure that they maintain the full surface the full extrusion of gasket from the parent metal out to the marrying gasket on the other alternate fitting.

So, if you do all of the things that we recommend in relation to taping properly, checking gaskets, whip checks pins, evacuating any excessive moisture, making sure that it’s lubricating, making sure the fins are clear and clean. The fan is spinning, the return air is not hot, all these valves are shut prior to putting air into the machine if you maintain all those vigil aspects of it.

If you maintain a vigil in relation to the aspects of this particular machine, you’ll stay safe. The machine will work towards optimum and more importantly, the job will get done quickly because you’ve got a particular machine here that does a specific job. This specific job is to remove moisture from my primary air. If I’m doing that, that maintains a longevity of the subsequent equipment attached to this particular unit.

So, stay safe, look after the equipment. If you look after it, it’ll look after you and ensure that you do follow any procedure in relationship to this particular unit and thanks for watching.

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