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Dewalt 2 Stage 80 Gallon Stationary Electric Air Compressor Review

Air Compressor Upgrade

IMG_20160126_102014260When looking for a new air compressor there are a lot of terms that can make the decision a bit complicated.  One of the first issues most see is an oil-free or oil bath air compressor.  The small air compressors that have low performance (cubic feet per minute) are normally oil-free.  The better performing air compressors above the oil free are oil bath single stage units.  Above the single stage units are the two stage units that compress air multiple times before it reaches the tank.  We will discuss this further below.

In this review, we took a look at an affordable, well performing air compressor that would run most anything a large shop would throw at it.  The Dewalt DXCMV5048055 features a cast iron 2 stage compressor pump with hardened steel disc valves, oversized taper roller bearings, fully balanced cast iron flywheel with splash type lubrication and 220v electric motor with thermal overload protection system.

Features

  • Industrial performance delivers maximum CFM @ 175 PSI; provides enough power to operate more than one air tool or device at one time
  • Cast iron, industrial duty, two stage compressor pump with hardened steel disc valves, oversized taper roller bearings, fully balanced cast iron flywheel, and splash type lubrication
  • Industrial class electric motor equipped with pre-wired and mounted magnetic starter
  • Uniquely designed metal belt guard improves compressor pump cooling by as much as 60 degrees F over other belt guard designs
  • Large capacity, 80 gallon ASME certified tank
  • Shipped with synthetic oil for optimum performance and long life
  • Equipped with tank pressure gauge and on/off switch
  • 2 Year Limited Warranty

Single Stage Vs Two Stage

IMG_20160126_094234108It is important to understand the difference between a single stage compressor and a two stage compressor.  In a single stage compressor the air is drawn into a cylinder and compressed in a single piston stoke then the air is sent to the storage tank.  In a two stage compressor, air is drawn into a cylinder and compressed in a single piston stoke, then the air is sent via an inter-cooler tube to a second, smaller high pressure piston and compressed a second time before it is sent to the storage tank.

Don’t confuse the fact that a single stage air compressor can have two or more pistons. Most single stage pumps are twin cylinder design as this is easier to balance than a single piston. If the cylinders are the same outside diameter it is a single stage pump.  In a dual stage pump the first stage cylinder is always a larger diameter. Also a dual stage pump will always have an inter-cooler tube or finned housing attached to the pump to cool the air before being compressed a second time.

Dewalt DXCMV5048055

IMG_20160126_094021893The Dewalt 80 gallon two stage air compressor is a large and heavy unit.  We picked ours up from Home Depot in our dump trailer as it was lower to the ground than our truck bed.  We are also lucky that we had forks available to remove the 471 pound compressor from our trailer.  This is a top heavy unit and not easy to drive around with standing up.  There is little to strap to on top, so think about how you plan to transport this unit.

This unit, along with all oil bath compressors, need a 30 minute break in period where there is no load on the unit.  In our case, the Dewalt did not come with the 3/4″ pipe thread plug, so we ran it with that open to relieve any pressure.  This helps to seat the rings in the piston walls and allow the compressor to perform well after the break in period.  It is important to complete this break in!

IMG_20160126_094118360After the break in, the unit should have a recovery time of about 30 seconds, starting from 145 psi and reaching almost 175 psi before the unit shuts down.  There is no lag or bog in the motor as it reaches 175 psi.  This is the big difference between this two stage compressor and our older single stage.  Besides only reaching 125 psi, our single stage compressor was louder and it would run for long periods to recover.  In some cases, while it was under heavier loads, it would never turn off.  The Dewalt two stage can easily handle the larger loads and also multiple pneumatic tools including sand blasters and air over hydraulic jacks.

Overall, this unit can put out 17 scfm to the tools.  Measuring the air pressure at the end of our 50 foot hose, we found there is about a 20 psi drop.  So tools that are rated for 120 psi will only get the full pressure if our first regulator was set to 140 psi.  The hose will restrict the air pressure a bit, so stepping up to a larger diameter hose is needed, especially when running larger impact wrenches.

Remember to look around at prices and look for deals.  Many store will price match.

PRICING

DeWalt 80 Gallon 2 Stage Air Compressor DXCMV5048055

Dewalt 80 Gal. Stationary Electric Air Compressor Model # DXCMV5048055

DeWalt DXCMV5048055 Two-Stage Cast Iron Industrial Air Compressor, 80-Gallon

IMG_20160126_094312149

Specifications

Drive  Belt Drive
Horsepower  5.2HP
Tank Size  80gal
Power Supply  Electric
SCFM @ 175 PSI  15.8
SCFM @ 100 PSI  17.5
SCFM @ 90 PSI  N/A
SCFM @ 40 PSI  N/A
Pump Speed  610rpm
Tool Length  31.5″
Tool Weight  471lbs
Tool Height  77″
Tool Width  34.75″

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One Response to “Dewalt 2 Stage 80 Gallon Stationary Electric Air Compressor Review”

  1. Adrian Toma #

    Hi, I was wondering if you would be kind enough to email me some Dimensions. I realize the overall dimensions are listed but I believe that includes the compressor up top and the belt cover. I am more interested in what the tank dimensions are so I can see if I can fit it in the corner of my two car garage along with two cars in the garage. Thank you very much and I really appreciate your time.

    April 6, 2016 at 11:04 pm Reply

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