The QT Pro 4103DS12HCB23 puts a 10 HP, two-stage compressor on a horizontal 120-gallon receiver, giving you 175 PSI performance in a 55" tall package. Its 78" × 28" footprint makes it a practical alternative to a taller vertical tank when overhead clearance is limited. The pump is cast iron, splash lubricated and belt driven by a 230V, 3-phase motor running at 1,750 RPM, with Quincy rating the pump for 50,000 hours or more. Note: this model requires 230V, 3-phase power.
The low pump speed is a key part of the design. Running at 1,750 RPM reduces piston speed and helps control operating temperatures, which puts less stress on the rings, valves and bearings during extended use. The two-stage pump also passes air through a high-efficiency finned intercooler between stages before reaching its final pressure. Cooling the air between compression stages reduces the work required by the second stage and helps control the heat and moisture entering the receiver.
This compressor is a strong fit for automotive and truck service shops, fabrication facilities, welding operations and light manufacturing that need steady compressed air throughout the workday. The horizontal receiver is particularly useful in converted garages, low-ceiling bays, basements and other locations where a 120-gallon vertical tank will not fit. At approximately 850 lbs, it requires a suitable load-bearing floor and adequate clearance around the pump, belt guard and tank connections. The 1" tank outlet also gives you a solid starting point for properly sized shop piping.
A factory-fitted magnetic starter with thermal overload protection helps protect the motor during overload conditions, while the ASME-certified receiver includes a pressure relief valve. Shop piping, electrical disconnects, filtration and dryers are separate installation requirements. Quincy does not specify a fixed breaker size for this model, so have a certified electrician size the circuit according to your service, conductor run and local code.
Why 1,750 RPM Matters
Horsepower isn't the only factor that determines compressor life. This belt-driven pump runs at 1,750 RPM, reducing piston speed, bearing stress and operating temperatures compared with faster-running consumer compressors.
The pump uses splash lubrication and an extra-capacity oil reserve, helping control heat and extend oil life. Combined with cast-iron cylinders and an aluminum head, Quincy rates the design for approximately 50,000 hours of service life.
Two Stages and the Intercooler
The two-stage pump compresses air in two steps, with a high-efficiency finned intercooler between them. Cooling the air before the second stage reduces the work required to reach 175 PSI, lowers operating temperatures and helps remove moisture before it reaches the tank and air lines.
Starter, Connecting Rods and Tank Safety
A factory-installed magnetic starter with thermal overload protection protects the motor from overload and stalled conditions. The two-piece connecting-rod design simplifies maintenance and rebuilding.
The ASME-certified receiver includes a pressure relief valve and 1" discharge connection. Properly sized shop piping is essential to avoid restricting the compressor's output.
Will It Fit?
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Dimensions: 78" L × 28" W × 55" H
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Weight: 850 lbs
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Power: 230V, 3-phase
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Maximum pressure: 175 PSI
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Tank: 120 gallons
Perfect For
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Automotive and truck shops running multiple air tools and equipment.
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Fabrication and welding shops using plasma cutters and other continuous-demand tools.
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Low-ceiling facilities where a tall vertical compressor won't fit.
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Light manufacturing requiring steady compressed air throughout a shift.
What's in the Box?
The package includes the two-stage cast-iron pump, 1,750 RPM motor, belt drive and guard, finned intercooler, magnetic starter and 120-gallon ASME-certified receiver with pressure relief valve and discharge connection.
Specifications
| Model |
4103DS12HCB23 (QT Pro) |
| Motor |
10 HP, electric |
| Pump speed |
1,750 RPM |
| Pump type |
Two-stage, belt drive, cast iron with aluminium head |
| Lubrication |
Splash lubricated, oil sight glass fitted |
| Maximum pressure |
175 PSI |
| Supply voltage |
230V |
| Phase |
3-phase |
| Magnetic starter |
Included |
| Recommended breaker |
Consult a certified electrician |
| Tank |
120-gallon, horizontal, ASME certified |
| Tank outlet |
1" |
| Length |
78" |
| Width |
28" |
| Height |
55" |
| Weight |
850 lbs |
| Aftercooler / air dryer |
Not fitted |
| Electronic drain valve |
Not fitted |
Certification, Honestly
The receiver is an ASME-certified pressure vessel, and the manufacturer also lists a CSA mark. These certifications cover different aspects of the equipment: ASME applies to the pressure vessel, while electrical markings apply to the motor and controls.
Always verify the markings on the unit's data plate when it arrives. If your inspector, insurer or facility requires a specific listing, confirm it before installation.
Shipping and Delivery
This 850-lb compressor ships by freight to the lower 48 states. Unloading requires a suitable forklift, loading dock or arranged terminal pickup. Residential deliveries may incur an additional fee.
Warranty
The compressor includes a 1-year factory warranty, with eligibility for Quincy's 3-year "No Bull" warranty when the manufacturer's requirements are met. These may include purchasing the required maintenance kit with the compressor and registering the unit with Quincy.
