Shop air compressor wont put out more than 110 PSI
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09-23-2009, 04:07
Post: #21
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Shop air compressor wont put out more than 110 PSI
At 05:49 AM 9/23/2009, WanderlodgeForum@yahoogroups.com wrote:
>1a. Re: Shop air compressor wont put out more than 110 PSI > Posted by: "jcmace59" jcmace@... jcmace59 > Date: Tue Sep 22, 2009 10:52 am ((PDT)) > >Ed, > >I went way overboard with my shop compressor, but I never have to >worry about lack of pressure or volume. I bought an upright 6hp >175psi twin cylinder machine capable of about 15cfm at 90psi, >IIRC. I have it hard plumbed into the garage, so I have hoses and >air ports in several locations. If you use the sch 80 PVC, it will >handle the normal pressures and is easy to install. Expensive, >slightly, but I'll take it with me to the next house and never wear >it out. I can run anything I want. I probably have ~$1500 in the >total install, including the breaker box and wiring, pvc, hoses, >connections, the unit itself, etc. As far as I'm concerned, it was >(and still is) a very cheap investment that continually pays me >back. And it only takes up slightly more floor space than most roll >arounds, as it sits on a small pallet in the back of the garage. Using PVC for compressed air is not something I'd do nor recommend. In fact, I would strenuously recommend you NOT do that. Compressed air and PVC is a time bomb waiting to go off. Here's what OSHA has to say about it... http://www.osha.gov/dts/hib/hib_data/hib19880520.html Here's a few PVC vendors. Note that both have notations about NOT using PVC for compressed air or gases. http://www.lljohnson.com/Documents/resco...%20Fi\ ttings.pdf http://www.kbico.com/filez_29101/specshe...ule-80.pdf ABS pipe is OK to use. But, not regular Sched 80 PVC. But, its your life and your body parts - not mine. Jonathan Leifheit Gonnabee (someday) |
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09-23-2009, 06:00
Post: #22
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Shop air compressor wont put out more than 110 PSI
No help with the compressor - I have the same problem. My fix is to top the steering tires off with CO2 to 115 lbs. I take the tank with me to top off should it be needed on the road.
Dick Hayden - '87 PT 38 - Lake Stevens, WA
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09-23-2009, 06:05
Post: #23
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Shop air compressor wont put out more than 110 PSI
I have some extensive runs around the farm of air in PVC, and just 1/2" sch40 at that, BUT,
one where it's buried 36" or more underground in ditches between buildings. I used PVC underground
to have no worries about underground leaks from fittings, but everywhere it surfaces I bring
the PVC aboveground it is encapsulated in a larger diameter metal pipe from 24" underground to past
where the fitting converts it to metal pipe. This is done so any shards from a PVC burst will
be encapsulated by the surrounding metal pipe. I have almost 6000 feet of underground runs
done this way around the farm and they work great and are also safe.
Â
Dorn Hetzel
77FC35
Hogansville, GA
On Wed, Sep 23, 2009 at 12:07 PM, Jonathan L <"reck@gojackets.com"> wrote:
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09-24-2009, 12:51
Post: #24
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Shop air compressor wont put out more than 110 PSI
Greg, I read my tire pressure off the gauge above my chair in air conditioned
comfort. The only thump is when I drop my credit card on the counter. Tommy Two Shoes McCarthy 95 PT42 WBSA Aguanga, CA --- In WanderlodgeForum@yahoogroups.com, "gregory O" > > I never used any air other than a shop compressor. I believe tires are good for 7 or 8 years with air and 5 or 8 years with the other promotional stuff. it doesn't matter what you run in them. I bet the folks that run co2 and Nitro replace tread at 5 years anyway, oh yea do oil sampling. folks like that are sticklers so we will never know the longevity of tires run on promo products. ( I rotate a pair'o new steer tires in every 2 years, put the old ones on one side of the drive, then move the old drive off to the tag.) > > tire shops use larger hoses because their impact guns require the cfm (cubic feet of air passed per minute) which is a measure of volumn. if they run the smaller dia hose the guns will starve of air and friction of the tight path of air will reduce the 'working pressure during the volumn demand'. but the pressure will return no matter what the size of i.d. is. > > when I fill up a flat tire I add volume of air by removing the schrader valve out of the stem. this helps open the airway into the tire 5 fold. this will keep the compressor motor running and ensure you get max pressure avaliable. when you get to the top of the max output of a compressor it shuts down at lets say 110. the compressor motor wont turn on until it goes to 85 90ish. that is why you cant get it to max air pressure. "cut out, cut in of the compressor". > when filling the tires and the compressor shuts down because the flow(cfm) is slow remove the air chuck from the tire and bleed the tank until the compressor comes on. When the compressor come on hook up to the tire again. > > truckers dont check pressure every day. they thump their tires with a stick. when you open the valve to check air, there is a chance to get tire rubber in the schrader and the tire will leak. I think tire temp, visual and thump is a better way to check ap. A day or two before a trip I check ap with a gauge then thump them the morning of departure. > Greg ofTim&Greg > 94ptca > |
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10-03-2009, 16:52
Post: #25
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Shop air compressor wont put out more than 110 PSI
Ed,
A lot of shop air compressors have a knob on the control panel that controls a regulator at the outlet of the compressor. Cranking that knob in will increase the outlet pressure up to the pressure in your accumulator tank, on board the compressor. There are several potential issues. You should be certain that the gauge that you are using to set the compressor is good. Make sure that is okay or get another gauge in your outlet connection. Another issue is the maximum set point of your compressor control regulator. Yet another issue is the control pressure range. Most ranges are set at 30 to 40 psi. Your compressor should start about 30 to 40 pounds below the maximum set point pressur. It sounds to me, from hundreds of miles away, like the problem may be the maximum set point of your compressor. There is a small black box in your compressor that contains the control valve. Before you do anything else I would encourage you to make sure the pressure gauge is working properly. IF YOU ARE CERTAIN that the compressor is not coming up to it's design pressure you can adjust the shut off pressure on your air compressor. Typically there is a bolt in the pressure control box that controls the maximum set point pressure. The bolt I am referring to is above a large spring inside the box. Turning the pressure adjusting screw down (clockwise) increases the maximum air pressure on the air compressor. Frequently, one turn equals 10 psi. Regarding dry air. Nitrogen or CO2 are an alternative. Probably a much less costly alternative is to use a "desiccate air dryer" with your air compressor. Because I use compressed air for so many purposes on board using nitrogen just isn't a good option for me. Harbor Freight has a 2" x 36" desiccate dryer that cost $40. It's a 2" pipe with 1/2" connections containing 2.2 pounds of desiccate. If you use a filter to clean up any possible contaminates you can get nice dry air out of a shop air compressor. Good luck on your quest. Eric Perplies currently in Chicago 96' 42' WBWL |
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10-04-2009, 07:09
Post: #26
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Shop air compressor wont put out more than 110 PSI
--- In WanderlodgeForum@yahoogroups.com, "perplies_eric"
> Eric>>> Thanks for the reply. I may try that adjustment thing with the nut. Previously, I emailed support for Porter Cable,the compressor maker. They replied and said my 135psi comp. would only do 110psi due to factory adj.. A couple of days ago I called a local "birder" and he suggested what he had done and that was to put in a"T" prior to the output adj knob which is at max. That did the trick, I can now finess it up to 120psi. That takes care of me at home but what about on the road? The other day at Lowes I saw where Husky has come out with a storage tank with 150psi. I wonder what psi the truck stops have on their compressors? Thanks for the help Ed Gardels 89SP Arlington Texas > Ed, > > A lot of shop air compressors have a knob on the control panel that controls a regulator at the outlet of the compressor. Cranking that knob in will increase the outlet pressure up to the pressure in your accumulator tank, on board the compressor. There are several potential issues. You should be certain that the gauge that you are using to set the compressor is good. Make sure that is okay or get another gauge in your outlet connection. Another issue is the maximum set point of your compressor control regulator. Yet another issue is the control pressure range. Most ranges are set at 30 to 40 psi. Your compressor should start about 30 to 40 pounds below the maximum set point pressur. It sounds to me, from hundreds of miles away, like the problem may be the maximum set point of your compressor. > > There is a small black box in your compressor that contains the control valve. Before you do anything else I would encourage you to make sure the pressure gauge is working properly. IF YOU ARE CERTAIN that the compressor is not coming up to it's design pressure you can adjust the shut off pressure on your air compressor. Typically there is a bolt in the pressure control box that controls the maximum set point pressure. The bolt I am referring to is above a large spring inside the box. Turning the pressure adjusting screw down (clockwise) increases the maximum air pressure on the air compressor. Frequently, one turn equals 10 psi. > > Regarding dry air. Nitrogen or CO2 are an alternative. Probably a much less costly alternative is to use a "desiccate air dryer" with your air compressor. Because I use compressed air for so many purposes on board using nitrogen just isn't a good option for me. Harbor Freight has a 2" x 36" desiccate dryer that cost $40. It's a 2" pipe with 1/2" connections containing 2.2 pounds of desiccate. If you use a filter to clean up any possible contaminates you can get nice dry air out of a shop air compressor. > > Good luck on your quest. > > Eric Perplies > currently in Chicago > 96' 42' WBWL > |
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