buying a new air compressor
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- This topic has 27 replies, 7 voices, and was last updated 13 years, 4 months ago by Nelson Hays.
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- December 30, 2011 at 4:24 am #34966
[quote=”MoCoke” post=24342]motor speed is 700 rpm, pump would go as fast as the motor turns it so idk. i also looked at some other compressors and motor speed is nearly twice that but the pump was the cheap chinese type. the better pumps have slower speed motors turning them.[/quote]
correct. Slower pump speed = Longer pump life.
Look for amp ratings on the motor to be realistic, and a slow RPM pump.
[quote=”Wydir” post=24350]well I can’t say I have seen a 700rpm motor most are 1750rpm or 3600rpm and the pumps are turning 700rpm
do you have a model number I could just go to grainger and see what motors are on that comp[/quote]
well we use a R717 Refrigrent dryer but I would guess this would not be the route you would take. but sadly them eaton comp people make refrig. dryers for cheap also not sure if you want to stick with them.
I have used Pneumatech dryers in the past they are nice as long as you know the air flow in your building (burned out a few fan motors because of this) and we just ripped it out and threw it away and piped it in to the R717 unit we already had
The old shop I used to work at installed a Kaser compressor may be you might want to check them out.
the comp is on the left side of the pic on the floor and the airdryer sits on top of the tank. Ok the pic im talking about is the 3rd one. The gallery just comes up with my link :compsmash
http://us.kaeser.com/
http://www.pneumatech.com/December 31, 2011 at 6:15 pm #35000dont forget to pipe in and automatic tank drain as well. for the dryer look for one that can handle hotter incoming air temps. this way it can be mounted closer to the compressor. some of the cheaper units cannot and need to be mounted further away to give the air a chance to cool some before going through the unit
January 1, 2012 at 3:43 am #35016I am thoroughly convinced Tsunami makes the best air dryers on the market.
January 1, 2012 at 3:44 am #35017[quote=”ding” post=24379]for the dryer look for one that can handle hotter incoming air temps. this way it can be mounted closer to the compressor. some of the cheaper units cannot and need to be mounted further away to give the air a chance to cool some before going through the unit[/quote]
true, but why fight physics? I say get it as dry as possible before running through any filters.
January 1, 2012 at 4:01 am #35018[quote=”bobwires” post=24396][quote=”ding” post=24379]for the dryer look for one that can handle hotter incoming air temps. this way it can be mounted closer to the compressor. some of the cheaper units cannot and need to be mounted further away to give the air a chance to cool some before going through the unit[/quote]
true, but why fight physics? I say get it as dry as possible before running through any filters.[/quote]
because cooling down through a further length of line doesnt dry it. as the air cools the water condenses and is able to then be removed. so if you can cool it and remove it closer to the compressor then you dont have unwanted water vapor traveling through more of the air line than neededJanuary 1, 2012 at 6:33 am #35021even good dryers don’t work as well when the air is hot. that’s why the fancy pants units have cooling built in.
at first I ran 3 tanks and a cheap water trap. never had any issues with contamination or moisture.
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