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Quincy 453DS80HCB23 QT Pro — 80-Gallon Two-Stage, Horizontal, 230 Volt Three-Phase
There is a trap in this part of the Quincy range and it is worth naming before anything else. The QT Pro 80-gallon two-stage package is sold as several visually identical machines that differ only in two things: whether the receiver stands up or lies down, and what supply the motor is wound for. This one is the horizontal tank on 230 Volt, 3-Phase.
The voltage is not a switch on the side. It is how the motor is built, and it is the single most common reason one of these sits on a pallet for a fortnight waiting for the right unit. Check the panel that will actually feed it — measured, not assumed, and not remembered from the last tenant — before you order.
Two model codes for the same unit
A second thing to settle up front. Two codes are published for this compressor: the title and specification data give 453DS80HCB23, while the manufacturer copy behind this listing gives 253DS80HCB23. If you are matching an existing installation or ordering service parts against a code, ask us to confirm it in writing before you commit — we will have Quincy settle it.
The horizontal layout, and who it suits
Lying the receiver down takes the overall height to about 47" and stretches the footprint to roughly 70" by 23". That is the trade in one sentence: you spend floor to buy headroom. It suits a bay with a low ceiling, a mezzanine overhead, a door track in the way, or a wall run where a long low machine tucks behind a bench and an upright one would not.
It also puts every service point at working height. The sight glass, the belt guard and the drain sit where you can see and reach them, which in practice is the difference between a compressor that gets its weekly check and one that does not.
Site it on a flat, solid, level pad. 660 lbs on four feet finds every high spot in a slab, and a machine that rocks will loosen its own mounts and put vibration through the building. Getting the floor right is the buyer's job and it costs nothing but attention.
What two-stage compression is doing for you
Air enters, gets compressed, passes through a high-efficiency finned intercooler, then gets compressed a second time. Cooling between the stages is the whole point: hot air resists compression, so cooling it first is what lets the pump reach 175 PSI as an everyday working pressure rather than a limit it strains at. It also keeps carbon from baking into the head, which is what shortens valve life on single-stage machines run hard.
The published output is 17.2 CFM at 175 PSI. Note the pair. A flow figure with no pressure attached to it is not a specification, and comparing two compressors on flow measured at different pressures is comparing nothing at all.
Details that decide the service life
Three of them, and none are cosmetic. The connecting rods are two-piece — fewer parts in motion and a straightforward job the day the pump needs attention. The oil reservoir is oversized, which matters for temperature more than capacity: more oil runs cooler and holds its grade longer under continuous work. And the manufacturer states oil carryover under 5 PPM, meaning very little oil mist leaves with the air, which is what you want if the line ever feeds finish work or air tools with tight tolerances.
The motor is an ODP slow-speed design. Turning the pump more slowly is an unglamorous way to buy durability and it works — less heat generated, less wear at the rings and bearings, and a machine you can hold a conversation next to.
Protection you do not have to specify
A factory-mounted magnetic starter with thermal overload comes on the machine, so the contactor and the motor protection are not a separate purchase and a separate mounting job. Low-oil shutdown stops the pump before a lubrication problem becomes a rebuild. An automatic tank drain handles the condensate, which quietly removes the most common cause of a rusted-through receiver: nobody remembering.
Our data does hold an amp figure for this build, but the conductor and breaker your electrician needs depend on the run length and your local code. Give them the real definition of the load — 5 HP, 230 Volt, 3-Phase — and let them size it. If you want the manufacturer's number for a load calculation, ask and we will send it in writing.
Perfect For

Shops on 230 Volt three-phase, common in older commercial and light-industrial buildings.

Low-ceiling installations where an upright 80-gallon receiver simply will not stand up.

Continuous production work — several tools running at once, or one tool running all day.

Owners who service their own equipment and want the sight glass and drain at hand height.

What's in the Box
The compressor complete: heavy-duty QT-5 two-stage industrial pump, cast iron with aluminium head, ODP slow-speed motor, high-efficiency finned intercooler, two-piece connecting rods, oversized oil reservoir, sight glass, factory-mounted magnetic starter with thermal overload, low-oil shutdown, automatic tank drain, enclosed belt guard, and the coded horizontal 80-gallon receiver with relief valves and a 3/4" outlet.
Not supplied: aftercooler, air dryer, filtration, regulation, or any pipework. Dry air is a separate design job.
Specifications
Electrical supply

Rated power
5 HP

Supply
230 Volt AC, 3-Phase — model-specific, not field-convertible

Motor
ODP, slow speed

Starter
Magnetic, factory mounted, thermal overload

Breaker
Consult a certified electrician

Pump and air

Type
QT-5 two-stage, belt drive, splash lubricated

Delivered air
17.2 CFM at 175 PSI

Maximum pressure
175 PSI

Oil carryover
Under 5 PPM, per the manufacturer

Connecting rods
Two-piece

Cooling
High-efficiency finned intercooler

Receiver and size

Tank
80-gallon, horizontal, coded, relief valves fitted

Outlet
3/4"

Drain
Automatic condensate drain

Overall
70" × 23" × 47"

Weight
660 lbs

Certification, stated plainly
The claims this product's data actually makes are two: the receiver is coded to the American pressure-vessel standard and carries relief valves, and the electrical components are UL and CSA recognised. On a vessel holding 175 PSI the first of those is the one that matters most, and it is a real, checkable claim.
What is not claimed anywhere in the data is an independent safety listing of the finished machine as installed. That is a different piece of paper from a component recognition or a vessel code stamp, and some insurers, fleet policies and local inspectors want it specifically for hard-wired equipment. We will not blur the two. If your cover or your sign-off depends on it, raise it with us before you order.
Shipping and receiving
This item ships free within the lower 48 states, so there is nothing to add at checkout.
Decide in advance how it leaves the truck. The driver delivers to the tailgate and no further, so line up a dock, a forklift, or a pallet jack and level ground. If none of that exists at your address, choose terminal pickup and take your own equipment to the carrier's yard. Deliveries to a home address are residential and carry a residential fee — say so at the point of order, not on the day.
Inspect the shipment before you sign anything. Damage recorded on the bill of lading while the driver is standing there can be claimed; damage found after a clean signature usually cannot. Photograph everything and write down what you see, even if you are not certain it matters.
Warranty
A 1-Year factory warranty applies, extending to Quincy's 3-Year "No Bull" warranty. The extension comes with Quincy's own conditions rather than arriving automatically with the machine, so read the warranty handbook linked on this page and check what this model requires before you plan around three years of cover.
Our own standing advice: if the pump misbehaves, do not open it. A pump that has been apart cannot be assessed for the original cause, and that turns a straightforward warranty claim into an argument. Ring us, describe what it is doing, and let it be examined intact.
Brand:Quincy CompressorCategory:Air CompressorSKU:2020040801Tags:Air compressor, Electric Air Compressor, Professional Shop Use Air Compressor, Stationary Air Compressor, Two Stage Air Compressor