Quincy Air Compressor 473D80VCB23M QT Max 7.5 HP 80 Gallon Two Stage 230V 3 Phase

The Quincy QT MAX 7.5 HP delivers 22.6 CFM at 175 PSI through a two-stage cast-iron pump feeding an 80-gallon vertical ASME-certified receiver. Its key advantage is the combination of low-oil protection and an extra-capacity oil reserve: the system shuts the compressor down if the oil level falls too low, helping prevent the bearing damage that can result when splash lubrication runs dry. The 230V three-phase motor is suited to commercial shop environments. Note: the unit measures approximately 37" × 24" × 74" and weighs 720 lbs, so verify ceiling clearance, floor capacity, and electrical requirements before installation.

The QT MAX uses splash lubrication rather than the pressure-lubricated system found on Quincy's QP Pro platform, but it is designed to address a different set of maintenance concerns. The larger oil reserve provides additional thermal capacity, helping the lubricant manage heat during operation, while the low-oil shutdown protects the pump when routine oil checks are missed. Its two-stage compression system uses a high-efficiency finned intercooler between stages to reduce the heat of compression, with cast-iron cylinders and aluminum heads for a combination of durability and heat dissipation. An air-cooled aftercooler further reduces discharge temperature, while the automatic tank drain removes condensate from the receiver.

This compressor is well suited to busy automotive repair shops, tire and exhaust operations, and multi-technician service bays that need 7.5 HP of two-stage performance on a 230V three-phase supply. It is especially practical for shops where equipment sees frequent use but maintenance schedules can be difficult to keep perfect. The vertical 80-gallon receiver also keeps the footprint relatively compact, making it a useful choice when floor space is limited but ceiling height is available.

QT MAX vs. QP Pro: The Honest Comparison

Quincy's two 80-gallon platforms use different lubrication systems. The QP Pro uses pressure lubrication with a gerotor oil pump and spin-on filter. The QT MAX uses splash lubrication but adds low-oil shutdown, an oversized oil reservoir, automatic tank drain, and an air-cooled aftercooler.

Choose based on your priorities: QP Pro for sustained heavy-duty operation where pressure lubrication is preferred; QT MAX for shops that prioritize oil-level protection and built-in moisture management.

What the Extra Oil Reserve Does

The oversized oil reservoir provides more than additional capacity. More oil helps absorb pump heat, supporting cooler operation and slower oil degradation.

The result is more stable lubrication between service intervals and better protection for internal components.

Two-Stage Compression & Heat Management

The pump compresses air in two stages, with a high-efficiency finned intercooler between them. Cooling the air before the second stage reduces heat and supports efficient compression to 175 PSI.

Aluminum heads help dissipate heat, while cast-iron cylinders provide durability and dimensional stability.

The air-cooled aftercooler reduces discharge temperature before air enters the receiver, helping moisture condense inside the system rather than throughout the shop piping. The automatic tank drain removes accumulated condensate without relying on manual draining.

Starting & Protection

The factory-mounted magnetic starter provides contactor-controlled starting and thermal overload protection. The pump uses two-piece connecting rods, while the ASME-certified receiver includes the required pressure-relief hardware.

Will It Fit?

The vertical receiver measures approximately 37" × 24" × 74" and weighs 720 lb. Check ceiling height and allow additional overhead clearance for maintenance. Install on a flat, level, load-bearing surface.

This build requires 230V, 3-phase power. Confirm the voltage at your panel before ordering. Have a qualified electrician size the breaker and conductors based on the motor data, run length, installation conditions, and local code.

Electrical work, site preparation, and permits are the customer's responsibility.

Perfect For

• Busy repair shops with extended daily air demand
• Multi-technician service bays
• Tire, exhaust, and general automotive work
• Shops replacing compressors that lacked low-oil protection

What's in the Box

Complete tank-mounted compressor with two-stage cast-iron pump, aluminum heads, 7.5 HP motor, belt drive and guard, finned intercooler, air-cooled aftercooler, automatic tank drain, low-oil protection, magnetic starter, and 80-gallon vertical ASME-certified receiver.

Not included: piping, electrical disconnect, air dryer, or downstream filtration.

Specifications

Certification, Honestly

The receiver is ASME certified, and the manufacturer's data lists CSA marking. These cover different things: ASME applies to the pressure vessel, while electrical markings apply to the motor and controls. Neither certifies the installation itself.

Verify the actual data plate when the machine arrives. If your insurer, inspector, safety officer, or employer requires a specific listing, confirm it before connecting the compressor.

Shipping & Delivery

Ships by freight throughout the lower 48. At approximately 720 lb, plan for a forklift, loading dock, or terminal pickup. Residential delivery carries an additional fee.

Inspect before signing. Check the guards, aftercooler, drain fittings, and receiver bracing. Photograph and record any damage on the bill of lading with the driver present. A clean signed receipt can make freight damage claims difficult.

Warranty

The compressor includes a 1-Year factory warranty and may qualify for Quincy's 3-Year “No Bull” warranty when the manufacturer's conditions are met. These generally include purchasing the required maintenance kit with the compressor and registering the unit. The supplied warranty documentation contains the definitive terms.

Warranty Details