### How much cfm psi in a can of propellant?

I want to sandblast/etch an image onto acrylic. so i was wondering how close do the specs of canned air get to an actual sandblaster. Ive searched and couldnt find this anywhere. How much cfm and psi is there in a can of propellant. Can anyone help me with this?

Topic by bsmith102   |  last reply

### how much psi does galvanized steel hold, in compresed air?

Looking foward to making a spud gun out of metal, for high psi i know that pcv holds about 40-50 psi i want more bang for the buck EDIT¨: well i whas thinking of making a tube 1" gun of galvanised steel , pvc here is like \$ 2-3 usd a tube that has like 2-3 meters, but i tought i could hold more psi in steel and there fore trow stuff  at long distance

Question by Bhakto   |  last reply

### Can an engine be a High Pressure Compressor? Answered

I have tried this question before but, people pay little attention it seems like.  I know you can modify engines and all that stuff so that they will compress air and all that good stuff, but CAN THEY HANDLE 4500 psi type pressures.  The heads of 4500 psi compressors don't look like the cylinders are much bigger than those on a lawnmower.

Question by jj.inc   |  last reply

Ok, so I need to make a compressor that reaches 4500 psi.  I live in a farm town and my dad has a tractor so I wondered if I took two identical hydraulic cylinders and filled one with what I was compressing, and the other I powered with the tractors hydraulic system, if I would be able to achieve high pressure and fill tanks, assuming the hydraulic pump and cylinders are rated for that pressure.  Or could I just use a hydraulic compressor.

Question by jj.inc   |  last reply

### How much psi can these objects hold...

How much psi can a: 1. Coke Bottle 2. PVC Pipe 3. Metal Pipe safely hold? Is there a formula that I can use to calculate any vessel's psi capacity? Thank You!

Topic by La Tour Rouge   |  last reply

### Large High Pressure Storage Tanks? Answered

I am looking into a green power system but, I would need 4500 psi hydrogen tanks.  They are way to small to be practical, even the large 144 c.f. ones (biggest I could find).  Is there anything special about hydrogen storage tanks, or will any 4500 psi tank work, and does anyone know were to get big ones, like huge.  If not, any ideas on how to fab one.  I know a guy who is high pressure certified so he could weld it, but what thickness of metal is needed for say a 12" diameter tank about 10-15' foot long. (yea, that big)

Question by jj.inc   |  last reply

### I'm going to join two 1.25 litre bottles together for a 80 psi water rocket. Is it ok?

I'm going to join two 1.25 litre bottles together for a 80 psi water rocket. Is it ok or should i make it more longer with a third bottle? what should be the ideal volume of the bottle for good efficiency at 80 psi?

Question by sharath rc   |  last reply

I am planning on making a very high volume compressor from a small engine.  I plan to adjust timing and stuff accordingly.  I just wan't to make sure an engine can handle the pressure.  I assume it can because of the explosions it can contain but I just want to be sure it can handle 125-200psi.  And also, is 2 stage really necessary or can I just push all the air in in one stage with a couple pistons.

Question by jj.inc   |  last reply

I would assume it can't be, but it would be really lucky if a pressure washer could fill an air tank to the pressure the washer is rated for.  So can a pressure washer that says 5000 psi really fill a tank to 5000 psi with the right fittings.  It probably won't be breathable or paint ball worthy but is it plausible.

Question by jj.inc   |  last reply

### What will multiple vacuum pumps do to a vacuum system, namely to PSI?

Long story short, I'm looking to make a vacuum forming table, and have most of the thing designed. However, I am looking to use two (maybe three) cheap vacuum pumps until I have the money to get a decent vacuum pump. I know that the pumps (4 CFM) if stuck in parallel will get me roughly 8 CFM, however, what will that do to the PSI? The pumps have a 90 PSI pull (if thats the right phasing to it) and I'm unsure what grade of pip/tubing to get for this. Thanks in advance!!

Question by DoctorWoo   |  last reply

### A neon with an a/c that just doesn't work, Now what can this girl do to fix?

I have a 05' dodge neon with an a/c that just doesn't work. I bought on of those R-134a kits and checked the PSi like the instructions say to and low and behold the gauge is reading 200 PSi. Now what can this girl do to fix the problem...any helpful tips?

Question by AmberD5   |  last reply

### how many psi can a 5 gallon plastic bucket (found in home depot) can take?

So im doing this for a chemistry project. My plan: to create a cannon with buckets and tubes with ping pong ball. I use dry ice and water to compress gas in the bucket and release the air through the valve. i realized that when i puff air into it and conceal it, (3 to 4 times) the bucket starts to deform.

Question by punch2dface   |  last reply

### Low pressure pneumatic grid (1 to 4 psi) to use small wind, small hydro and small solar power?

I have used low pressure air and a simple "airlift pump"  to cycle water around a "pallet  Garden" since August.  This meant that very little water was being used but the plants were growing really well.   the air comes from an aquarium bubble pump and it is about 1 psi.  The pallet garden is almost 20 ft from the little bubble pump.   Recently I decided to do something similar in my greenhouse, but it is 120 ft from the little pump and there is no electrical socket close.  So reluctantly I bought another 120 ft of 1/4 inch tubing to send the air to the greenhouse.  I didn't expect it to work at that distance.  But it is working great. Why not use air instead of electricity to move the energy from "toy" windmills in gardens? Or from low head small water power?  I bet anyone could make a compressor to make 1 PSI.  It is orders of magnitude easier than making a direct water pump or converting the energy to electrical and then back again in a pump.  An airlift pump is just a vertical tube in the water.    How simple is that!   and it is darn cheap too.  You can use this for pumping water (Highest I ever got was 18 ft with 1 psi) or just bubbling air into a fishpond or to actually move the water in small water features.   Or of course in the pallet garden or in aquaponics.  And even thought this energy is useful at that scale it can never ever be made worthwhile to share it electrically.  But maybe your grid could extend to your neighbours garden too?  You could have an interconnector if you or they have a bit of excess pneumatic power!

Topic by gaiatechnician   |  last reply

### water pump

I have a very strong 18v motor from an expensive cordless drill(clutch went out). I also am in need of a pump to drive some misters, 20+ PSI. Is there a pump I can make or buy to be driven by my motor?

Topic by geckoguykc   |  last reply

Is a possible way to super cool a gas (nitrogen or oxygen) to liquid temperatures by using a sub-zero tank of 5000 psi compressed air to blast that gas over a radiator and therefore cool the gas in the radiator to a liquid, then quickly pump it to a chilled high pressure insulated tank.

Question by jj.inc   |  last reply

### Is a special technique required to apply water-based paint with an air spray gun?

Using 30-40 psi as specified. Using a small, detail gun with compressor.   Finish is rough, flat, rather than glossy.  Spray appears to dry in flight. I varied distance, paint-volume, pressure, and thinned the paint with water.  Nothing is effective.

Question by JonBoy17   |  last reply

### Recommendations for safe pneumatics?

I'm looking for a pneumatic setup for an air tank and a blow gun that is safe enough to use around school kids.  I want to provide pneumatic feedback to give the sensation that they were hit by a small gust of wind.  Safety is the foremost concern on this.  What size tank, psi, and regulator should I use?  Also can this small 'gust of wind' be controlled from a USB port?

Question by codingJoe   |  last reply

### What does osi stand for? Answered

As in, "a 16 osi blower delivers 400 cfm of air through a piping system..." I know that cfm is a way of writing cubic feet per minute. PSI is pounds per square inch. Building systems to move gases and liquids around safely has really had me stumped till now, especially when dealing with HVAC. I'm not familiar with some of these units.

Question by Vorenus   |  last reply

### Any idea for recycling an old compressed natural gas cylinder? Answered

It was in the waste, I recovered it. weights 34 kg (75 pounds) diameter 24 cm (9.4 inches) length 80 cm (31.5 inches) capacity 30 liters (7,9 gallons), working pressure 200 bar (2900 PSI). hemispherical ends medium hard steel Maybe I could make a crucible for melt aluminum, copper, etc, cutting 15 cm from the bottom. But for this it is a little big.  I am waiting some suggestion. Thanks in advance!

Question by rimar2000   |  last reply

### my Vehicle 2007 kia spectra wont start. making a constant noise when trying to start vehicle ?

Recently the vehicle radiator went out and had the radiator replace by a mechanic. Drove the vehicle around for about 90 miles and everything was working fine. one morning I went out to start the vehicle and my ac unit was not blowing any air at all for about 2 mins I turned off the vehicle and let it rest for about a few hours went back out to start the vehicle again and that when the issue started. The engine would not turn. It was making a constant noise when trying to start the engine but would not turn. I had one of my cousin come check it out for me and brought his compression test equipment 3 of the holes only were at 30 psi while the other was hitting 60 psi. During this process oil did not start shooting out until we were on the last valve checking with the test. He checks the timing belt and it seem to be accurate. We measure the "T" and were on perfectly. We could see the red dot through the holes to confirm it was on. My cousin then advise that he needs to replace the valves and take apart the engine. He thinks it may be a bad oil pump that cause the time to jump just wondering if anybody else has any other ideas of what to look for,

Question by anthony.sanchez.90260   |  last reply

### TITAN the HPMWR

TITAN the High Powered Minature Water RocketOk, yeah sure. What the hell is that then?I'ble to follow...If someone can find me a smaller one, i'll beat it.It stands 7 inches high.TITAN flys well over 70 foot and has a alloy chamber capable of withstanding over 250 PSI.Oh how I love compressed air!Don't worry Poseidon is still in the making and will be posted for the "Keep the bottle" contest. There is also another full bore, open throat 5 x 600 ml rocket to come.

Topic by Lftndbt

### Anybody want to model "reflux" in the circulatory system? Physical model or computer pipe model!

My wife just had an amazing success when we went down to Newport Beach, California to get venoplasty to relieve many of  her symptoms following a stroke.  http://www.youtube.com/playlist?list=PLkzXlmAwZTZfQ01RnN-8Ip5lUz0HrNWzN  We pay for national medical insurance in Canada and this treatment is not covered.  (Even though it clearly works, )   One road block is that an expert doctor here could not find any evidence of reflux in blood flow to or from the brain.  (Some MS patients have damaged valves in their neck veins).  Now, given that each heart beat raises blood pressure from 1.5 psi to 2.3  psi about once every second and that valves are actuated by the blood flowing backwards, I find the "expert doctor's" results impossible to believe.  I am not totally without knowlege in that area either because I made a low pressure airlift pump this year  that has a much higher lift submergence ratio than the normal ones.  (The airlift in a bucket one). I was told that the maximum  lift to submergence in these things was probably not much more that 10 to 1 but I managed to get over 20 to 1 lift to submergence primarly by reducing reflux.    Also, I observed that the effects of this reflux can extend conciderable distances from the "valve" itself and are different in small tubes than in big tubes.  Therefore it is possible (Likely even) that a damaged valve in a persons jugular will have its primary effect in a capallery somewhere in the brain up to a foot away from the damaged valve.  So if someone made this model, I think it is likely that they can contribute to the rapid advancement of medical science!   Brian White

Topic by gaiatechnician   |  last reply

### How to compress air into a hollow solid without a valve?

Hi  Really need some help with this one, have searched everywhere but cant seem to figure it out. I know there is probably a very easy solution i'm missing so please help. Basically I want to compress CO2 at around 80 psi into a hollow metal. I have drilled a micro hole and created an opening (about 2mm radius) into the metal. My problem is after I compress the CO2 in there how do I remove the compressor nozzle and seal the hole without the CO2 escaping.  The metal is small and there is no place for a valve. Is there such a thing as a self sealing removable valve? Or could I use a valve  with two openings and pump liquid metal (that would than solidify) and seal the hole so I can remove the compressor?

Question by cnaidoo   |  last reply

### How to use an Compressed Air tank?

I am new to compressed air tanks. I need some details about them. (For an air car actually) 1. How to refill a 4500 psi air tank. 2. How do I know the pressure of air comming out . ( Most Important) Can anybody please provide me a schematic drawing on how do I connect the air tank, the pressure gauges (Gauge 1. which shows the pressure and amount of air in the tank and Gauge 2 which shows the pressure of air comming out)  and the compressor with the copper tubes. I read on a site formula for power of an air engine is HP= PLAN / 33000 where P. Mean effective pressure in pounds per square inch. L. Stroke in feet. A. Piston area in square inches. N. Number of power strokes per minute. How do I get value of N for the formula. Thanks for any help.

Question by flyingdutchmen1659   |  last reply