The Difference Between A Single Stage And A Two Stage Pump

[@puntagordy]

Very informative. I think it is great that good people just like you share how to, DIY etc. on yt. I gather so much information for the need to do list. Thank you again.

[@AirCompressorPartsOnline]

+puntagordy Thank you for the positive feedback. That's what we're all about, and there will be much more to come in the future. Cheers!

[@johnyates1627]

Great explanation in a brief amount of time! Thanks!

[@johnsmith-qz4bv]

can u use the single stage pump on a 60 gallon compressor....?..

[@AirCompressorPartsOnline]

You sure can. There are many different sizes of single-stage compressors, from the smallest oil-free unit to large, v-twin (or tri-piston) pumps. Of course, if the pump is a very small direct-drive oil-bath or oil-free unit you won't want to install it on a 60 gallon tank, but any belt-driven oil-bath piston pump can be installed on a tank of that size.

[@johnsmith-qz4bv]

@@AirCompressorPartsOnline ok great thank you

[@staticxmako]

hey i have a 180gal 200psi tank i just bought its a saylor beal. and it hit over 200 unless the gauge is off...anyway i just bought it i think it might be from 1972 it doesnt look all thaaaat old but is that tank still safe to use to 200 psi? water drains a little orange but not brown

[@AirCompressorPartsOnline]

Thanks for the comment! As long as your tank holds pressure and you have no pinhole leaks, it [should] be safe to use. I can't speak to the integrity of the tank for 100% certainty as I can't see it, but I would certainly keep the pressure under 200 PSI just to be safe. Most tanks can handle this pressure but giving the age, I can't be certain. If the unit pressurizes past 200, I would replace the on/off pressure switch, as most two stage units are set for a max pressure of around 175 PSI.

[@Aalsayyed]

ahmed alsayyed 1 second ago i have 2hp motor and would like to buy air compressor pump, what will be pump size that compatical with the motor

[@ilyashoshana3950]

Looking to buy 5 HP 80 gallon air compressor but quiet one , what is your recommendation?

[@AirCompressorPartsOnline]

Thank you for the question! There aren't many very quietly operating 5 hp 80g oil-bath compressors out there to be honest. California Air Tools does manufacturer an oil-FREE stationary air compressor and the noise level on their compressors is very low, but the oil-free unit may not provide enough CFM for our application, so it really depends on the CFM demands of your compressor. For oil-bath units, you should be able to purchase a noise-shielding cover for it, which is usually available as an accessory. It's essentially a ventilated, sound proofed box that covers the entire motor and pump. You can see an example of a unit like that at the below link: www.maxtool.com/products/belaire-qp318ve-208-230-volt-5-hp-80-gallon-vertical-electric-air-compressor

[@davidharris7618]

Dumb question. I have a V pump. Does that mean it's a 2 stage? Also I'm looking to replace it. Do I have to use the same brand because it's been discontinued. What has to match up. And how do I know horse power. I have a Campbell Hausfeld HS750000P right now. I know this an old thread. Thanks for any help. Or I need a piston or valve rebuild kit which I cant find. One of the rubber seals is broke.

[@AirCompressorPartsOnline]

Thanks for the question! Just because a pump is a v-twin doesn't necessarily mean it's a 2-stage pump, no. Your particular model pump, however, is a 2-stage v-twin pump. You are correct that the replacement pump is obsolete. I'm not sure of a model that will bolt right on, so you may want to contact Campbell's air compressor division at 800-543-6400. They may be able to recommend a replacement that will be similar to the original in size and output. You don't have to install a Campbell Hausfeld pump, of course. Either way you'll want to make sure the new pump ideally has the same exhaust outlet size, a similar flywheel diameter and a similar CFM output as the original.

[@YouSpamTard]

I cant pump up pressure. I think I got a hole in the tube that goes from the low side to the high side. I hear it leak and I put a rag on it and the noise goes away. I have not removed it yet to see if there is a hole in the tube or a gasket leak. I will squirt some soap on it tomorrow. What is that cooler thingy on the intake side. I want one of those. I just have an air filter set up in that location.

[@AirCompressorPartsOnline]

+YouSpamTard That's an Aftercooler and typically all two-stage pumps will have a finned Aftercooler to aid in cooling down the air before it reaches the tank. Many manufacturers offer Aftercooler options for air compressors, whether it be a bolt-on kit that connects directly to the head, or a Belt Guard-mounted option. Something like this, for instance: www.grainger.com/category/air-and-water-aftercoolers/air-compressor-accessories/pneumatics/ecatalog/N-ae5

[@rotarycomptech]

How can you possibly say that a two-stage air compressor will as you put it recycle quicker Then a single stage air compressor when the overall displacement is larger in the single-stage machine then the 2-stage machine case in point in a two stage air compressor the capacity of the machine is only the displacement of the low pressure piston does this make sense to you? Also maximum interstage pressure is only 45 PSI not 70 check it for yourself with a gauge

[@GruvenHaus]

No matter your displacement every pump of a single stage is going to give you about 100psi at best before transferring to the tank. A 2 stage is going to take that 100 psi pump and hit it one more time in the smaller chamber and push it out to the tank at 175psi

[@allb4dinner962]

i have the compressor on the left what size electric motor would i need to run that

[@AirCompressorPartsOnline]

You can run this pump with a 1 to 3 horsepower electric motor. Typically, a 1.5 HP to 2 HP is used, as the higher horsepower motor will give you more torque and hence more CFM delivery (due to it spinning at a higher RPM). Hope this helps!

[@allb4dinner962]

Thank you for your fast response much appreciated :)

[@gergemall]

Air Compressor Parts Online , Thank you

[@510Redneck]

I have a U.S. general Compressor in a garage I purchased... long story short it stopped building air, ripper her apart and the "stainless valves" are worn down. My question is where do I buy the darn little things? I never thought in my life it would be so hard to find a few small pieces of spring steel to get me up and running again, until now. lol Any help would be appreciated since my tire machines etc. currently run off of it. I'm looking to upgrade sometime this year with a new pump etc. but need to get myself back up and going in this location for the time being since I'm currently in the middle of a pretty major truck build for a unaware veteran returning home soon. Again, any help would be appreciated in this concern (finding said stainless spring steel "valves" to buy). If you can link me to someone to buy these little parts it would be GREAT! Thanks~ Red

[@AirCompressorPartsOnline]

+510Redneck I'm sure we can help you find these Reed Valves. Do you have a model# on your air compressor? It should start with a "US" and look something like "US6580V2" or "US660V". It would be on a decal, most likely on the air receiver. If you don't see a model# then you can email us a few photos of the pump itself to [e-mail]. We'll do what we can for you!

[@510Redneck]

Air Compressor Parts Online Sorry for the sluggish response, been super busy and somehow missed this reply until now. Its the US660V, which for some reason I forgot to mention it seems (scatter brained). Relevant question: You are affiliated with mastertoolrepair right? or no? Again (just so we are on the same page), what I'm searching for is just the 4 small spring steel "stainless steel valves" that sit inside of the valve body (which is still in good shape). Said "stainless steel valves" have worn down and I'm merely searching for replacements and spare ("valves") for the future, as I will be putting this one (the 660V) in a different building after I "upgrade" to a better pump in the near future where this one is currently residing. Thank you for your reply.

[@AirCompressorPartsOnline]

We are affiliated with Master Tool Repair, yes (ACPO is a sister company). The Valves you need would be cheap enough to purchase, but they're not available separately I'm afraid. The "B3800" pump on this unit is made by ABAC/IMC (now under Chicago Pneumatic's wing). The Valves are only available in a "Valve Plate Kit" which is part# 9428001 and sells for around $54. It includes Valve Plates with Valves pre-installed, and upper and lower Valve Plate Gaskets. You may be able to contact Chicago Pneumatic to obtain individual Valves but I don't think they're offered like that. Thanks for the question and let me know if there's anything else I can do!

[@510Redneck]

Air Compressor Parts Online Ok cool, that's what I thought after a bit of research into the companies profile etc. I did order the valve plate kit from MTR and currently awaiting its arrival. I only wish that I could get some spare "valves" for future maintenance of said compressor, that way for 1) I could keep her performing well while in use without unexpended downtime occurring.. and 2) keep from obtaining valve plate damage which results in having to buy a lot more than needed *if* able to properly maintain said unit. BUT with all that being said I understand how some manufactures work and its no fault of yours that the parts are not supplied to you in such a manner (or even available for that matter). Regardless, thank you for your help and I will be buying more parts from you guys in the future simply due to your efforts in assisting me... You will be at the top of my list to check with first in anything compressor from here on out. I will let you know how the "valve plate" goes.. thx again... Peace

[@AirCompressorPartsOnline]

That is how the parts business works sometimes, you're right. It's too bad the manufacturer doesn't offer small components like the Valves separately as we would gladly offer them and it would be a very cheap repair, but as you stated it's only offered in an assembly. Either way I really appreciate you giving us your business and for the kind words. We do what we can. Thanks and good luck with the repair and we'll be here for your future air compressor repair needs!

[@carlsaberhagen628]

3:20-3:34 for the answer to the "difference between a single stage and a two stage." You're welcome.

[@happydays454]

Carl Saberhagen ok so that's tha actual definition

[@happydays454]

Carl Saberhagen that's not its copressed twice smart guy

[@lexidecimal9941]

Hi there, very informative thank you. Would either of those models be a good piece to consider adding to my truck as a permanent fixture? Mainly, during long runs, I really have no way of properly and quickly to fill up my tires. it's a 1 ton dually pickup and heaven forbid i need to top up 4, 6 or 7 tires on in the middle of nowhere with nothing but the 'cough' heavy duty box store brands? They need 80psi, one time when one was real low, i am quite sure after 30 minutes of nearing 70psi is why that compressor died. Much obliged. also, id like to know what you might recommend for such a solution to invent.

[@AirCompressorPartsOnline]

Thanks for the comment! When choosing a gas-powered air compressor for a service truck, I always recommend a two-stage pump. This will give you higher CFM and higher PSI. I'd recommend a unit that puts out at least 15 SCFM if not more. A 13 HP or 18 HP gas engine would be necessary to push a two-stage pump that puts out the CFM you need. I'd recommend brands like Jenny , Quincy, Ingersol Rand or Rolair as these are heavy-duty units made for the jobsite and service vehicles.

[@lexidecimal9941]

Wow, glad to read that, Ill check out those brands and consider the space and power requirements incorporating your suggestion. I had a good deal to be made on a Schulz MSL 10 MAX. Thank you kindly for replying to my question. Glad you are still around!

[@All2Skitzd]

Fix the leaks and you don't have to top up 7 tires in the middle on nowhere

[@josephpuchel6497]

Hello Excellent video tutorial.

[@AirCompressorPartsOnline]

Thank you!

[@engineeryaqoob4358]

Any guys have compressor which has inout for pump.

[@juliusbenzonan8723]

Just want to ask another difference between single stage with two or more cylinder and a multi-stage with two or more cylinder is their size in piston, since in a larger piston large volume of air is suck having a low pressure, and goes into an intercooler then to a smaller piston to compress the cooled compressed air to higher pressure. in single stage no matter how many pistons a compressor have as long as it have same size of pistons it can't compressed further to a higher pressure. Hoping for your reply thanks.

[@AirCompressorPartsOnline]

That's a good insight Julius and yes, you are correct. In 99% of two-stage units, there is a low pressure piston (at least one, depending on how many pistons it has) and a high pressure piston. the HP piston is smaller and the LP piston is larger. For S.S. pumps, the pistons are generally all the same size. Thanks for the comment!

[@georgespangler1517]

When you look at the picture,,I have the smaller unit,,,but it has 2 pistons doing the same thing as the one big piston on unit on right,,making the same amount of air,,,, but unit on right has little piston to boost up to higher pressure,,,, my unit will make 155 lbs of pressure,,,at 11 CFMS at 90 psi,,, and is smaller and quieter and cheaper to run,

[@dginta7932]

Awesome information, thanks.

[@AirCompressorPartsOnline]

We appreciate it and thank you for watching!

[@michaelfrancis3261]

So the two stage is better, I need something for spraying cars Auto body work. The one I have right now is a single stage and it won’t keep up with my spray guns. Thanks for the video.

[@randyexel3655]

Can anyone out there give me a lead on how sells internal components, I get directed , to all the same sites over and over , need dimension of big end and little I.D. and C/C of the rod length Thanks for anyone reading this Randy Carburetor

[@defaltoption]

what is the ratio between the large cylinder and the small one or dose it mater

[@AirCompressorPartsOnline]

Good question! I'm sure it does matter, and this spec will be determined by the manufacturer when designing and building the pump. It's not a set standard for every two-stage pump, as manufacturers have their own reasons for determining piston diameter, length, etc.. Many pumps I've seen have a high pressure piston that is roughly 1/3 the size of the larger, low pressure piston. That's a good question to ask the manufacturer if you have a specific pump in mind!

[@defaltoption]

I am looking to build a two stage silent compressor using two fridge compressors. I am guessing to get them to work efficiently in tandem it would be ideal if the output of the first compressor was equal to or slightly less than the second compressor after its compression stroke. I am using a plasma and other tools in a residential environment and need high output but obviously low noise. in hind sight the first compressor will expand to match the second cylinder so it is really only crucial to ensure there is no back pressure in the first cylinder to cause stress but the second is still small enough to retain the bulk of the work the first has already done???. so a small priming tank would be enough to ensure both didn't work against each other. I am not sure I may have answered my own question but please rip it to bits if I am wrong

[@GasserGlass]

Do you sell compressors?

[@AirCompressorPartsOnline]

We do sell compressors in various brands, but we mainly deal in Coleman Powermate, BelAire/IMC, Jenny (Emglo) and Rol-Air.

[@24cata24]

i m pretty sure that ''intercooler'' tube does nothing it s just a pipe doesnt even have fins and its to short to cool incoming hot air .. air to air heat exchanger doesnt work that way

[@AirCompressorPartsOnline]

You're right about this particular two-stage pump and about "air-to-air" cooling. The manufacturer calls the tube an "intercooler" but it's essentially just a transfer tube, transferring the air from the low pressure chamber to the high pressure chamber of the pump head. The "aftercooler" on this two-stage pump does have fins, but for heat dissipation only. If the user wants to effectively cool the compressed air before it reaches the tank, one would have to install a belt-guard mounted aftercooler, a liquid-cooled stand-alone aftercooler or something similar.

[@williamsantiago7303]

Great video buddy, thank you for making it. I would like a stand up 60 gallon compressor but I don't know which one to go with when it comes to 2 stage or 1 stage. I'll be using it for air tools on engines filling tires and occasionally using a air sander or bead blasting engine parts and sometimes painting with my air spray gun but mostly I'll be using it for impact tools and tires. Can anybody point me in the right direction if I should go with the 2 or the 1 at stage.

[@chrishayes5755]

pretty sure all that matters is the tank capacity and the CFM rating. any 60 gallon tank unit should probably suit your needs.

[@randyexel3655]

I own the that exact same pump got it new on an Air America made by DeVilbiss , 27 years old , has been a charm, replaced the reed plate and gaskets , upper end GASKETS needed 😊for that job, reeds had no lite passing Thur ,cleaned with de carbonizer , perfect.That was 6 years ago, been my best buddy.started getting louder , bottom end more so, then upper ,pulled the pump drained the oil thur the paint strainer , normal discoloration, always use wolfs head air comp. 10w30.needs to come apart , and before I open her up, want to be sure parts are somewhat available, well I have called many of the repair and sales and they say bearings obsolete, don’t want to get into cam bearing substitute, if I get lucky and find something close, specifications appear to-be non extent , So What I’m saying is HELP PLEASE Randy Carbeutor

[@smkyg]

single stage pump has more cfm than two stage pump. all piston are working to deliver air, rather than two stage pump that several piston suck air from atmosphere. single stage has equal size of pistons. I HAVE EXPERIMENTED IT WITH JUST THE PUMP(same size pump and number of piston) AS MANIPULATED VARIABLE. two stage does filled the tank slower. do your research first before arguing with me.

[@bosshawg7427]

People often fall for marketing tricks and don't consider apolication. The average user has little to no need for 2 stage, yet they think it's better for them when it's just better for the manufacturer to make more money.

[@randyexel3655]

P/S the two stage pump

[@georgespangler1517]

No!! You get more CFMs from a single stage because you have 2 pistons working together,, a single stage will run smoother and quieter and even cooler then 2 stage, due to not pumping the air twice, best to buy single stage for all around use,,,mine was set at 155 and I turned it down to 130 psi,,,all I will ever need and it will extend pump life because it cuts the time to fill the 60 gallon tank by almost 2 minutes, more CFMs is more important than crazy high 175 psi pressure, unless your filling big truck tires,,,

[@AirCompressorPartsOnline]

You do have a point, George, and thank you for the comment. For most applications (especially weekend warrior types) a single-stage compressor is sufficient. Yes, a two-stage compressor operates at a higher PSI and generally, two-stage pumps DO produce more CFM, but there's a catch: at lower pressures, single-stage units usually do product more CFM but at higher pressures, two-stage units product more CFM. It also depends on the number of pistons each pumps has, and the size of them (as well as the horsepower of the motor running the pump). Bottom line, it's really a matter of the particular application one will be using the compressor for.

[@georgespangler1517]

@@AirCompressorPartsOnline l I have a 60 gallon single stage 2 pistons with 3.7 hp in my shop. 11.5 CFM does ok for most of what I do and electric tools have come far and even better than air tools now,,,, but I picked up a vintage speedair 4 cylinder Smith pump single stage with 8 hp gas engine,,,monster puts out 36 cfms,,, I restored it. like new payed 100 bucks and in research found out American eagle still makes the compressor pump and it's 6000 dollars to buy it now,,,lol. Love those finds

[@AirCompressorPartsOnline]

@@georgespangler1517 You got yourself a find there indeed, wow. American Eagle is still around, certainly and I'm familiar with the Smith pumps as many were used on the older Sanborn compressors.

[@daveengstrom9250]

Far TOOOOOOOOOO wordy.