Quincy Air Compressor 120 Gallon Two Stage 230V 3 Phase

The Quincy QP Pro 15 HP two-stage compressor is built for long-term service, with replaceable wear components instead of sealed assemblies that force replacement when they wear out. Its stainless steel reed valves and valve bumpers, spin-on oil filter, graphite gaskets, and gerotor oil pump are all serviceable components, while Quincy rates the pump for 60,000+ hours of life. The 1,750 RPM cast-iron pump sits on a 120-gallon horizontal receiver rated to 175 PSI and runs on 230V three-phase power. Note: this unit draws 42A, so electrical installation should be planned with a licensed electrician before delivery.

The lubrication system is designed for routine service rather than complicated rebuilds. A positive-displacement gerotor oil pump circulates lubricant through the system and allows filtration through a spin-on cartridge, while the oil sight glass makes level checks straightforward. Stainless steel reeds handle the repeated cycling inside the pump, with valve bumpers limiting their movement and helping reduce fatigue. A fin-and-tube intercooler manages heat between compression stages, while the mounted air-cooled aftercooler lowers discharge temperature before air enters the tank. Together, these systems help protect the pump's highest-wear components and support consistent operation over years of use.

The QP Pro is a strong fit for busy automotive workshops, tire and fleet service bays, paint and body operations, and shops that prefer maintaining equipment rather than replacing it. Its horizontal 120-gallon receiver measures 78" × 28" × 55" and weighs 995 lbs, so plan for a level slab, adequate service clearance, and appropriate handling equipment. The 1" tank outlet provides a substantial connection point for the shop air main. This model requires 230V three-phase power and is not intended for single-phase installations.

Reed Valves and Why They Matter

In a reciprocating compressor, the valves open and close on every stroke, operating through millions of cycles in a hot environment where oil mist and compressed air are present. That makes valve durability an important part of long-term pump performance.

Stainless-steel reed valves are designed to resist the heat and fatigue associated with repeated cycling, while valve bumpers limit reed travel and help reduce stress at the flex point. The pump also uses a fin-and-tube intercooler to reduce the temperature of the air between compression stages and a mounted air-cooled aftercooler to lower discharge temperature before the air reaches the receiver.

The goal is straightforward: control operating temperatures and reduce the stresses placed on the valve system during repeated operation.

Filtered Oil, Not Just Oil

The lubrication system uses a Gerotor positive-displacement oil pump, which supplies a controlled flow of lubricant to the pump's critical components. The oil passes through a spin-on oil filter, helping remove contaminants before they circulate through the lubrication system.

The spin-on design also simplifies routine filter replacement. An oil sight glass provides a quick visual check of the oil level, while the low-oil shutoff provides additional protection by stopping the compressor if the oil level falls below a safe operating point.

Will It Fit?

• Floor. 78" long by 28" wide on a level slab. Allow additional working clearance at the service points, including the drain, oil fill and belt guard.
• Overall height. 55".
• Weight. Approximately 995 lbs, delivered on a pallet.
• Electrical supply. 230V, three-phase. Quincy lists a 42 A current draw for this configuration but does not publish a specific breaker size, instead directing buyers to consult a certified electrician. Follow that guidance: conductor length, ambient conditions, installation requirements and local electrical code all affect the appropriate protection and conductor sizing.
• Discharge. 1" tank outlet.

The foundation, electrical feed, disconnect and connection to the shop's compressed-air main are the customer's responsibility. Electrical installation should be completed by a properly licensed electrician in accordance with applicable local requirements.

Pressure and Storage

The compressor is rated for 175 PSI and uses a 120-gallon receiver. The higher tank rating provides additional storage capacity at pressure, while the downstream air system can be regulated to the pressure required by individual tools.

A larger stored-air reserve can help reduce how frequently the compressor needs to cycle when demand fluctuates and provides additional reserve capacity when multiple users draw air simultaneously. The actual performance of the system still depends on compressor output, operating pressure, tool demand and the shop's piping configuration.

Perfect For

• Busy independent workshops with compatible 230V, three-phase service.
• Tire shops and fleet bays with sustained compressed-air demand.
• Paint and body operations that require a steady supply of properly treated compressed air.
• Shops that perform their own routine maintenance and prefer equipment with accessible, serviceable components.

This configuration is not suitable for single-phase electrical service. Confirm the voltage and phase available at your installation site before ordering. Selecting the correct electrical configuration before delivery is far easier than trying to resolve an incompatible power supply afterward.

What's in the Box

The package includes a fully assembled compressor with a cast-iron two-stage pump, aluminum heads, motor, 120-gallon horizontal receiver, magnetic starter, mounted air-cooled aftercooler, high-efficiency fin-and-tube intercooler, spin-on oil filter, stainless-steel reed valves and oil sight glass.

No air dryer is included.

Shop piping, downstream filtration, regulators, the electrical disconnect and electrical feed are not supplied. When the compressor arrives, check the shipment against the packing list to confirm the contents before installation.

Specifications

Certification, Honestly

Our records identify the receiver as built to the ASME pressure-vessel code and list CSA among the unit's marks. These are separate certifications: an ASME pressure-vessel designation relates to the construction and testing of the receiver, not necessarily to the complete compressor assembly.

Insurers, fleet operators and local authorities may have specific requirements for permanently installed equipment, and a certification or listing accepted by one organization may not satisfy another. If a particular listing is required for your insurance, workplace or local code, verify it against the unit's data plate before purchase.

Before You Order — Please Confirm

A few published specifications differ across our available records. Rather than guess, we recommend confirming the following before ordering:

• Lubrication method. The package is described as fully pressure-lubricated, and the feature list states the same. However, one specification field in our catalogue records the oil system as splash lubricated. We cannot resolve that discrepancy from the information currently available, so we will not present either description as confirmed. If the lubrication method matters to your purchase, ask us and we will obtain the factory answer from Quincy.
• Electronic tank drain. Two records indicate that an automatic electronic tank drain is included, while another states that it is not. If you require a factory-fitted automatic drain, confirm the configuration with us before ordering rather than assuming it is included.
• Air delivery. No CFM figure is published on this page. The value in our records is not accompanied by a unit of measure that we can verify, and an airflow rating is too important to guess. Ask us and we will obtain the applicable factory rating.

Shipping and Delivery

The compressor ships by freight to addresses within the lower 48 states, with the current freight cost calculated at checkout based on your ZIP code and delivery address.

This is a 995-lb palletized machine arriving by freight truck. Arrange suitable unloading equipment in advance, such as a forklift or loading dock, or choose carrier-terminal pickup if that better suits your location.

Residential deliveries are subject to an additional residential fee, which will be reflected in the freight quote at checkout.

Before signing the delivery paperwork, inspect the shipment carefully. Walk around the pallet and check the receiver, feet, guards, gauges and cooler fins for visible damage. If you find anything wrong, document it and have the damage recorded on the bill of lading while the driver is present.

Warranty

The compressor includes a 1-year factory warranty, with coverage extendable to a 3-year “No Bull” warranty subject to the conditions specified by Quincy in its warranty handbook.