Quincy Air Compressor 5 HP 80 Gallon Two Stage 208V 3 Phase

The 5 HP, 230V 3-phase compressor combines a vertical 80-gallon receiver with a two-stage cast-iron pump designed for demanding shop environments. Its standout feature is the stainless steel reed valve system with valve bumpers, which limits how far the reeds can flex on each stroke, helping reduce fatigue-related valve wear over time. The pump runs at 942 RPM and produces up to 175 PSI, while the vertical design keeps the footprint to approximately 37" × 24". Note: this model requires 230V 3-phase power, and the electrical supply, circuit, and installation site should be verified before ordering.

The valve system is supported by graphite cylinder and head gaskets, which maintain a consistent seal through the temperature changes associated with two-stage compression. A fin-and-tube intercooler removes heat between the low- and high-pressure stages, while the mounted air-cooled aftercooler cools the compressed air again before it reaches the tank. This helps move moisture out of the air stream and into the receiver, where it can be drained rather than condensing farther downstream in your piping and tools. The magnetic starter includes thermal overload protection, and a spin-on oil filter and sight glass simplify routine maintenance.

This compressor is well suited to busy automotive service shops, fabrication and metalworking operations, and other commercial facilities that put their compressor through frequent cycles. It is also a practical choice for buyers replacing an older compressor who want a design that specifically addresses valve durability and heat management. At approximately 74" tall and 690 lbs dry, it needs a level, properly anchored slab and sufficient overhead clearance for service access.

Why Pump Speed Matters

Pump speed directly affects how much wear a reciprocating compressor accumulates over time. Lower shaft speed means fewer piston and ring cycles, valve movements, bearing load reversals, and thermal cycles per hour.

A slow-turning, belt-driven industrial pump can also reduce operating noise and heat generation. For a compressor expected to run for years, pump speed is an important part of long-term durability.

Valves & Cooling

Stainless steel reed valves with valve bumpers manage airflow through the pump. The bumpers limit reed travel, helping reduce fatigue at the valve root. Graphite cylinder and head gaskets maintain the seal through the pressure and temperature changes of two-stage compression.

Cooling occurs in two stages:

• Finned intercooler: Removes heat between compression stages and cools the charge before the high-pressure cylinder.
• Air-cooled aftercooler: Reduces discharge temperature before air enters the receiver, helping moisture condense in the tank rather than downstream.

Maximum rated pressure is 175 PSI.

Will It Fit?

• Footprint: 37" × 24", plus service clearance
• Height: 74", plus overhead clearance for servicing
• Weight: 680 lb dry
• Power: 208V, 3-Phase; factory-configured and not field-convertible
• Circuit: Breaker and conductor sizing by a certified electrician
• Air outlet: 3/4" tank outlet

The buyer is responsible for confirming 208V three-phase service, suitable flooring and anchoring, ventilation, and required electrical permits and inspections.

Perfect For

• Shops running compressors throughout the day
• Customer-facing facilities where noise matters
• Two- and three-bay service shops with 208V three-phase power
• Buyers replacing faster-running compressors and prioritizing long-term serviceability

What's in the Box

Complete vertical 80-gallon package including:

• Two-stage cast-iron pump with aluminum heads
• 5 HP industrial motor
• Magnetic starter with thermal overload
• Finned intercooler
• Air-cooled aftercooler
• Stainless steel reed valves with valve bumpers
• Graphite cylinder and head gaskets
• Spin-on oil filter and oil sight glass

Not included: air dryer.

Specifications

Certification, Stated Plainly

The receiver is built to the North American pressure-vessel code and the unit carries a CSA mark. Supplier data also references a North American third-party electrical listing, but we are not claiming that mark because the record is not clear enough to verify. If a specific listing is required by your insurer or local code, ask us to confirm the data plate before ordering.

Two Points to Confirm Before Ordering

Published information differs on two details:

• Lubrication: The manufacturer’s feature list describes a fully pressure-lubricated system with a gerotor positive-displacement oil pump, while the structured specification lists splash lubrication.
• Tank drain: The feature list and detailed specification describe an electronic automatic drain, while a summary field lists none.

If either specification matters to your application, ask us to verify the as-shipped configuration before ordering.

Shipping & Delivery

Ships by freight within the lower 48, crated on a skid. Have a forklift or loading dock ready; delivery is to the tailgate. Terminal pickup is also available.

Residential addresses incur a residential delivery fee. Let us know if your address has commercial receiving.

Inspect the shipment before the driver leaves. Photograph the crate, skid, and sheet metal, and record any damage on the bill of lading before signing.

Warranty

A 1-year factory warranty applies to consumer and commercial use. It can extend to Quincy’s 3-year “No Bull” warranty, including on-site service and labor, when the EWK-4 Maintenance Kit is purchased with the compressor and the unit is registered with the manufacturer.

Warranty Details