Motor Guard plasma air filter

/ Motor Guard plasma air filter #1  

J_J

Super Star Member
Joined
Sep 6, 2003
Messages
18,973
Location
JACKSONVILLE, FL
Tractor
Power-Trac 1445, KUBOTA B-9200HST
Regarding the Motor Guard M-50 air filters, with the 623 element, has anyone used these filter assembly's for their filtration with plasma or painting? The replacements cost anywhere from $5 to $30 each. The question is, if there is moisture in the air from the tank, is there supposed to be another unit in front of the Motor Guard filter to remove the moisture. The point to make here is that if the Motor Guard filter is the only filter in the system, it looks like the paper element would absorb any water/oil, and clog up or cause the element to swell and block incoming air. It does have a water drain on the bottom. I don't have the instructions for this filter, and was thinking some of you might be using or have used it before, and do you think this is the best filter for plasma cutting? I tried a small desiccant filter but the blue crystals turned pink fairly quick.

Another option I was thinking of is that Harbor Freight pipe filter, about 36 in long and 2 in ID with the blue desiccant crystals. The replacement crystals are readily available. Has anyone used this assembly?

Desiccant Air Dryer
 

Attachments

  • MG1.jpg
    MG1.jpg
    8.6 KB · Views: 270
  • A filter.jpg
    A filter.jpg
    9.6 KB · Views: 499
/ Motor Guard plasma air filter #2  
I use the HF drier pictured...works great. I bought a spare charge of desiccant so if one charge is in the oven drying I can work with the other.
 
/ Motor Guard plasma air filter #3  
JJ

Read the manual (online) on the dessicant dryer. You'll find it still needs a particulate filter.
 
/ Motor Guard plasma air filter #5  
JJ sorry to change the subject here but I just wanted to squeeze in to say congrats on being the "Member of the Month". I've always enjoyed you posts and appreciated your knowledge. :thumbsup: Cheers, Paul
 
/ Motor Guard plasma air filter #6  
Regarding the Motor Guard M-50 air filters, with the 623 element, has anyone used these filter assembly's for their filtration with plasma or painting?
Yes.

The replacements cost anywhere from $5 to $30 each.
There are other, cheaper "elements" that you could use ...... :rolleyes:

More on that in a moment ..... :D

The question is, if there is moisture in the air from the tank, is there supposed to be another unit in front of the Motor Guard filter to remove the moisture.
I dunno about "supposed to be" ...... but I have a Schrader filter/water separator installed on my shop air line, after it comes off the compressor .... I'm sure it helps to keep the M/G cleaner (and drier) ....

The point to make here is that if the Motor Guard filter is the only filter in the system, it looks like the paper element would absorb any water/oil,
That's absolutely the general idea ..... ;)

and clog up or cause the element to swell and block incoming air.
I think that it would take quite a bit to actually "clog" them up .....

I'm fairly certain that water or oil wouldn't do it .... :D

Although the issue that you would likely run into is the filter becoming so saturated that it passes some small amount of moisture or oil ..... which, of course, would be a bad thing for a plasma ....

It does have a water drain on the bottom.
Huh ?

Water drain on an M-50 ? ..... don't think so .... :confused2:

I don't have the instructions for this filter, and was thinking some of you might be using or have used it before, and do you think this is the best filter for plasma cutting?
For the money, a Motor Guard M-50 is hard to beat .....

I actually own three of 'em ..... one is stock, and is used on my plasma cutter .......

The other two are specially modified for a slightly different purpose :D ..... bypass fluid filtration ..... I use one to filter motor oil and the other to filter automatic transmission fluid, on my Dodge Sprinter van.

I've also seen them used as a coolant (antifreeze) filter on vehicles ...

Back when the founders of Motor Guard were actually involved in the business they used to sell and promote the filters for this purpose (oil filtration) .... the current management frowns on the idea .... must be all "the filtering oil with toilet paper" jokes and ribbing ....

I've used a variety of different "filter media" with the two that I'm using for bypass fluid filtration ..... you would likely be familiar with these other brands of "filter media" when used for a different purpose (ie. blowing your nose or wiping your hiney :laughing:) ...

Scott 1000 single-ply is pretty good ..... about 70 or 80 cents per roll at Walmart .....

What you want is a roll that is dense and very tightly wrapped ...... the stuff you know as "cheap TP" that feels about like sandpaper when you wipe is great ..... avoid the "floofy" stuff the wife buys .... not dense enough and not usually tightly wrapped ....

Those brown paper towels you find in wash rooms would be absolutely great .... but they're not made in the correct size .... too big of a pain (and too much waste) to unroll and cut them down to the correct size.

BTW, longest run on my Sprinter's oil sump using the Motor Guard/TP filter was over 50,000 miles on before complete change out (using Mobil 1 0w40 Synthetic) .... oil was still good and could have gone longer :thumbsup: (according to Blackstone Labs)

On the filter used for the engine oil, I usually changed out the filter "elements" every 3K to 5K miles (diesels being very dirty) and added a little make up oil (1/2 quart) ..... on the one for the transmission, I ran the element until I changed it .... usually somewhere between 60K and 80K miles ;)
 

Attachments

  • IMG_0009.jpg
    IMG_0009.jpg
    97.4 KB · Views: 504
  • IMG_0037.jpg
    IMG_0037.jpg
    96.4 KB · Views: 413
Last edited:
/ Motor Guard plasma air filter
  • Thread Starter
#7  
rswyan,

Thanks, that was very informative. This is the kind of post /answer that a person would like to receive. Informative with actual use and experiences. Thanks again.

So I am thinking, a water separator first after the tank, then the desiccant filter, and then a particulate filter.
 
/ Motor Guard plasma air filter #8  
Thanks, that was very informative. This is the kind of post /answer that a person would like to receive. Informative with actual use and experiences. Thanks again.
JJ,

You're quite welcome - glad to be of service. ;)

So I am thinking, a water separator first after the tank, then the desiccant filter, and then a particulate filter.
The M/G will act as a desiccant, by virtue of the fact that a dry element (made from wood pulp) will absorb water - up to a point - that point being where the filter's ability to capture additional moisture is diminished by what it already holds. I'd imagine that this is true of any desiccant filter, and probably why M/G recommends changing them as often as they do.

Absolutely nothing wrong with your plan - for me it would be a cost vs. performance issue: which element, acting as a desiccant, can I replace the cheapest ?

(70 cents for a roll of TP is pretty cheap ..... ;))

No experience with the HF unit, but reading the manual they say to "replace the desiccant every 6 months, or as needed depending on use" ....

Desiccant cost is $5 ..... and every six months wouldn't be bad ...... but ......

Considering where you live, you might have to replace it more often ...... :D

Having said that, also considering where you live, having both might be a very good idea :thumbsup:
 
/ Motor Guard plasma air filter #9  
Here are some pictures of the air dryer I built for my plasma, also use it for painting. ;)

50-feet.jpg

Intercooler.jpg

Temptest.jpg

Aftercooler.jpg

Temptest2.jpg
 
/ Motor Guard plasma air filter #10  
Shield ARC!!
I'm from GA. I can recognize a cleverly disguised still when I see one!!!:laughing:
 
/ Motor Guard plasma air filter #11  
Oops! Mark I'm from Arkansas, does that tell you anything? :laughing:
 
/ Motor Guard plasma air filter #12  
Shield,

Curious about the containment of your coils in the trashcan - is the purpose of the can just to protect the copper tubing ?
 
/ Motor Guard plasma air filter
  • Thread Starter
#13  
Is the purpose of the copper coil just to radiate the heat, or are you using something else to cool the air? Is the air temp 42 degrees, only with air moving through it?

Question on the plasma cutter. How do you trigger your plasma cutter on? Do you use the electronics board in the plasma cutter, or use a two wire setup on the trigger of the torch head that go to a relay on the stepper motor control box? Do you use the hand or machine torch head?

I have the Lincoln Pro-Cut 55 and I may be using the wires that go to the hand torch. If I use the machine torch, I will have to go into the plasma cutter to find the two wires that trigger the cutter on and run two wires to the plasma table control box. The table I have can be a 4' x 4' for portability, or a 4' x 8' for full length sheet stock.
 
/ Motor Guard plasma air filter #15  
J J, Mornin'.

I have a hypertherm plasma torch. The welding shop recommended a motor-guard filter in the line to remove particulate and moisture. I installed it as they recommended.
Since the original install, I installed a transmission cooler in the air line and a water separator canister downstream of the cooler but all is ahead of the filter.
The trans cooler removes quite a bit of water, saving the motor-guard filter some extra work.
Seems to work well.
One more thought. I use a dedicated air hose from the filter to the plasma. Wouldn't want dirt etc. to get in the torch from a dirty air hose.
 
/ Motor Guard plasma air filter
  • Thread Starter
#16  
rswyan

Do you have the M-50, and did you cut the TP filter down to fit. The 623 filter is smaller than the 723 used on the latest version.

It is just amazing what one can find out, just by asking. Thanks, to those of you that contribute to the knowledge base of others.
 
/ Motor Guard plasma air filter
  • Thread Starter
#17  
JJ sorry to change the subject here but I just wanted to squeeze in to say congrats on being the "Member of the Month". I've always enjoyed you posts and appreciated your knowledge. :thumbsup: Cheers, Paul

Thanks for the complement.

JJ
 

Marketplace Items

2017 Ford F-150 Pickup Truck (A61573)
2017 Ford F-150...
2019 Chevrolet Silverado 1500 Crew Cab Pickup Truck (A61573)
2019 Chevrolet...
2003 Chevrolet Kodiak C4500 Flatbed 503372 (A62613)
2003 Chevrolet...
John Deere 2750 Tractor (A64047)
John Deere 2750...
2004 Chevrolet 1500 Silverado Truck (A63116)
2004 Chevrolet...
2022 John Deere X730 Lawn Mower (A63116)
2022 John Deere...
 
Top