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Old 02-26-2006, 10:30 PM
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air compressor filter - pressure rating?

Hello All,

My new air compressor is a 175psi 2 stage unit. I went out looking at filter/regulator setups this weekend and didn't end up buying anything because everthing I saw was rated for a max pressure of 160 psi. Many of the units seemed to have a filter-regulator-filter setup. In theory the second filter (after the regulator would be OK), but the first would see the full 175psi from the compresssor. What the heck are you guys using?

Thanks,

Chris

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Old 02-27-2006, 06:46 AM
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I ran into the same situation. I ended up going with a filter rated at 150 on a compressor putting out 170. I just keep my fingers crossed.
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Old 02-27-2006, 05:06 PM
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You could always turn the pressure cutout down to a reasonable pressure. These high pressures are just a means of giving inflated CFM ratings. If you figure it out, unless you have a huge tank, 175 psi will only give you a minute or so of extended use time over 125 psi. 125 is a normal pressure cutout level. 175 will also make for extended run time to refill the tank with the motor under heavy load which means less motor life.
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Old 02-28-2006, 03:47 PM
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Don't worry about it those pressure ratings are max outlet the inlet pressure will be fine, there are many thousands of those things running on 175 (and even higher ) PSI with no problems. What brand/model did you get?
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Old 03-01-2006, 07:44 AM
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I'd say, base your purchase based on the working pressure of your tank. Max pressure for a compressor is the limit that the tank and compressor can take, not the working pressure. I have a 5HP, 60 Gal unit with a working pressure of 90 lbs, and a max pressure of 175lbs. , and go with that. If the working pressure is 175, then there are a bunch of commercial units out there that you can get for it.
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Old 03-12-2006, 08:17 PM
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All - I ended up with a Milton unit from Northern Tool for $69 or so - it is a combo filter and regulator and has a maximum inlet presure rating of 225psi.

Thanks!
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