Quincy Air Compressor 120 Gallon Two Stage

The Quincy QP Pro 10 HP two-stage compressor is built around the components that do the most repetitive work inside a reciprocating pump: its stainless steel reed valves with valve bumpers. The valves flex with every revolution, while the bumpers cushion their movement to reduce impact and fatigue. Cast iron cylinders, aluminum heads, and graphite cylinder and head gaskets add heat-resistant construction around the valve assembly. The compressor uses a 120-gallon vertical receiver rated to 175 PSI and operates on 230V three-phase power. Note: the approximately 75" overall height requires adequate ceiling and delivery access.

The fully pressure-lubricated bottom end uses a Gerotor positive-displacement oil pump to feed the crankshaft, bearings, and connecting rods. Unlike splash lubrication, this system allows the oil to pass through a spin-on filter, continuously removing contaminants before they circulate through the pump. An oil sight glass makes routine level checks quick, while the belt-drive layout keeps common service points accessible. The graphite gaskets also help maintain a reliable seal through repeated heat cycles, supporting consistent compression and reducing the gradual pressure loss associated with gasket deterioration.

The QP Pro is suited to professional automotive shops, service facilities, fabrication operations, and other workshops that need a durable two-stage compressor for regular compressed-air use. Its vertical receiver keeps the floor footprint to roughly 40" × 30", making it easier to fit along a wall, but the approximately 75" height makes ceiling clearance important. The unit requires 230V three-phase power and includes a magnetic starter; have a certified electrician determine the appropriate breaker and conductor sizing for your installation. Because the available airflow specification is not accompanied by a verifiable unit, it should be confirmed for the exact build before ordering.

Valves, Bumpers and Gaskets — The Unglamorous Part

A reed valve is a thin, flexible strip of steel with no bearings and no adjustment points. It opens under pressure and snaps closed again through millions of operating cycles. Two things eventually work against it: fatigue at the flex point and impact when the reed reaches the end of its travel.

Stainless steel helps resist fatigue and maintains its spring characteristics in the hot, humid environment around the cylinder. Valve bumpers address impact by cushioning the reed as it opens and closes, reducing the repeated metal-to-metal shock that can accelerate wear.

Neither feature is exotic, but both contribute to maintaining valve performance over the long term.

The graphite cylinder and head gaskets serve a similar purpose. Graphite handles repeated heat cycling better than many conventional composite gasket materials, helping maintain a reliable seal around the valve plate. A deteriorating head gasket may not produce an obvious failure; it can instead show up gradually as lost efficiency and reduced available pressure.

Pressure Lubrication Underneath

Below the valve deck, this machine uses a fully pressure-lubricated system. A Gerotor positive-displacement oil pump supplies oil to the crankshaft, bearings and connecting rods rather than relying solely on splash lubrication inside the crankcase.

Because the oil is circulated under pressure, it can also pass through a spin-on oil filter, helping remove contaminants before they reach critical components.

An oil sight glass provides a quick way to check the oil level. Combined with the spin-on filter and belt-drive arrangement, the system is designed around straightforward routine maintenance that can be handled as part of normal shop service.

Airflow: What We Will and Will Not Print

Our specification record contains a delivered-air figure for this pump at 175 PSI, but the figure is recorded without a unit of measure. We do not publish a performance number that we cannot independently verify from the available documentation, so there is no airflow figure listed on this page.

If compressor sizing is close for your application or tool list, contact us before ordering. We will confirm the applicable factory airflow figure for this exact configuration in writing.

Will It Fit, and What About the Electrical Supply?

This configuration uses a vertical receiver, keeping the floor footprint relatively compact at approximately 40 inches by 30 inches. The trade-off is height: the unit stands approximately 75 inches tall and weighs about 850 lbs.

Before ordering, check the available ceiling height as well as every doorway, shutter and overhead track along the route from the delivery point to the installation location. The installation area should have a level, solid floor with adequate clearance around the compressor for cooling airflow and access to service points such as the drain and oil sight glass.

Verifying the floor, clearances and access route is the customer's responsibility. A few minutes with a tape measure before delivery can prevent a very expensive installation problem later.

Electrical supply is 230V, 3-phase, with a magnetic starter fitted. Quincy does not publish a specific breaker size and directs customers to consult a certified electrician. The appropriate conductor and breaker sizing depends on the actual installation, including the length of the electrical run and applicable local code.

Have the electrical requirements confirmed before the compressor arrives rather than assuming an existing three-phase circuit will be suitable.

Specifications

Perfect For

• Shops with sustained air demand — sanding, blasting or paint-booth applications — where reliable valve performance matters over long operating periods.
• Workshops with 230V, 3-phase power already available and properly configured for the compressor.
• Tight floor plans where a vertical receiver is the practical way to get 120 gallons of storage capacity into the available space.
• Owners who expect to keep their equipment for years, with routine maintenance treated as part of the cost of ownership.

This configuration is not intended for single-phase service. If your building does not have compatible three-phase power, the compressor cannot simply be adapted with a basic plug or voltage converter. Choose a configuration that matches the electrical service available at the installation site.

What Is in the Box

The compressor is delivered factory assembled, with the two-stage pump, stainless-steel reed valves, graphite gaskets, motor, belt drive and belt guard mounted on the 120-gallon vertical receiver. The magnetic starter, spin-on oil filter and oil sight glass are fitted, and warranty documentation is included with the unit.

You will need to supply the electrical feed and disconnect, piping downstream of the 3/4-inch tank outlet, downstream filtration or drying if required for your application, anti-vibration pads, and replacement oil and filters for future maintenance.

Certification, Stated Honestly

The certification record for this compressor identifies an ASME-rated tank and lists UL and CSA marks. These certifications describe the equipment as manufactured and evaluated by the applicable certification bodies.

They do not certify the installation. Whether the electrical supply, disconnect, protection, ventilation and other installation details meet local requirements must be determined by a licensed electrician and, where applicable, the local authority having jurisdiction.

If your insurer, inspector or other authority requires specific compliance documentation, request it before purchase. We can obtain the applicable documentation from the manufacturer rather than leaving a compliance question until after installation.

Shipping and Delivery

Freight is available to the lower 48 states, with the shipping cost calculated at checkout based on the ZIP code and delivery address you provide. Residential deliveries are subject to an additional residential fee. Commercial delivery locations equipped with a suitable dock or forklift may be more practical, while terminal pickup is another option when the destination cannot accommodate freight unloading.

Plan the unloading arrangements in advance. The carrier's delivery point and available services depend on the shipment, but an approximately 850-lb compressor requires appropriate mechanical handling equipment. Arrange a forklift, loading dock or terminal pickup rather than relying on manual unloading.

Inspect the shipment before signing for delivery. Check the crate, receiver, pump, motor, guards and gauges for visible damage. If you find any damage, document it and have it recorded on the bill of lading while the driver is present.

Warranty

This model includes a 1-year factory warranty. The warranty documentation supplied with the compressor defines the coverage, exclusions and any registration requirements. If you would like to review the applicable terms before ordering, ask us and we can provide the documentation.

If a problem occurs, contact us before opening, dismantling or attempting repairs on the pump, motor or starter. Unauthorized disassembly can affect warranty eligibility. Keep the components intact, retain any removed parts and photograph the issue so the manufacturer can properly evaluate the claim.