Quincy QGS 50 HP Tankless Rotary Screw Air Compressor with Integrated Dryer

The single most useful thing to know about this machine before you buy it is how it arrives wired. Quincy ships part number 4152016908 configured for 460V-3, with a conversion kit for 230V-3 supplied in the crate. Both voltages are covered by one part number, the changeover is a documented kit rather than a factory order, and the work must be done by a licensed electrician. That one fact decides your installation timeline more surely than any performance figure on the page, because it means you are not waiting on a different SKU if your building runs the other supply.

Beyond that, this is a 50 HP gear-driven rotary screw package with an integrated refrigerated air dryer, rated for a 100% duty cycle and supplied without a receiver tank — it is designed to be plumbed into air storage you already own or are buying separately.

Will It Fit? Siting and power

Floor and access. The cabinet measures 71.3" long, 32.7" wide and 61.3" tall and weighs 1,437 lbs. That is a rigging job, not a two-man lift, and it needs a level pad plus service clearance on the panel sides — the doors are hinged and the panels detachable specifically so a technician can reach the filters and the fluid sight glass, which only helps if you have left room to open them.

Electrical. The motor is listed as 230/460 Volt AC, 3-Phase. Quincy does not publish an amp draw or a recommended breaker size for this unit — the specification literally says to consult a certified electrician — and we are not going to invent either figure. Your electrician sizes the feeder and the overcurrent protection from the nameplate on the machine in front of them. Bring them in before delivery day, not after.

Heat and ventilation. A 100% duty cycle machine is designed to run continuously, and everything it consumes leaves the cabinet as heat. Plan the room's ventilation for a compressor that never cycles off rather than one that runs a third of the time. Confirming the site is suitable is the customer's responsibility, and it is far cheaper to establish before the crate arrives.

Tankless, and why that is a choice rather than an omission

Tank size on this unit is listed as 0 Gallons and no receiver is included. That is deliberate. A rotary screw running at a genuine 100% duty cycle does not need a large receiver to survive the way a piston compressor does; the receiver's job shifts from protecting the pump to smoothing demand spikes and giving the dryer somewhere to work from. Shops that already own a receiver, or that want to size one for their own peak demand rather than accept whatever comes bolted to the skid, are better served buying the two separately. If you do not have a receiver, budget for one — a tankless package plumbed straight into the shop main is not a complete air system on its own.

Gear drive and the integrated dryer

Two design decisions here are worth explaining rather than listing. The pump is gear driven, not belt driven. There are no belts to tension, re-tension or replace on a schedule, and no slip losses between motor and airend — on a machine expected to run continuously, a maintenance task you never have to perform is worth more than a task you can perform quickly.

The refrigerated air dryer is integrated into the package rather than bolted on downstream. Compressed air carries the moisture that was in the ambient air, concentrated; left in the line it rusts pipework, ruins tool internals and wrecks a paint job. Drying at the source means the moisture is removed before it can travel, and an integrated unit is one enclosure, one power connection and one set of service access to keep track of. The unit also carries an aftercooler, an oil sight glass, low-oil shutdown on both engine and pump, and a spin-on fluid filter.

Control is by the Infologic2 Basic Controller, which is programmable, supports auto-restart, and can network up to six QGS units — relevant if this machine is the first of a pair. The display panel reads out pressure, temperature and dewpoint, so the dryer's actual performance is visible rather than assumed.

Perfect For

• Production shops running air all shift. The 100% duty cycle rating is the specification that matters, and it is what separates this from a large piston compressor.
• Facilities that already have air storage. Tankless means you are not paying twice for a receiver.
• Buildings on either 230V or 460V three-phase. The conversion kit is in the crate.
• Paint, blasting and instrument air. The integrated dryer is doing real work in all three.

What's in the Box

Quincy lists the following as supplied with this package: the gear-driven QGS rotary screw compressor, the Infologic2 Basic Controller and display panel, the 100% duty cycle TEFC motor, the integrated refrigerant air dryer, and the 230V-3 conversion kit for a unit shipped wired 460V-3. No receiver tank is included. Installation, wiring and commissioning are not included and are your electrician's and installer's work.

Specifications

Two rows above are printed as bare figures with the unit in the row label, because that is exactly how the manufacturer's own spec sheet records them.

Certification, stated honestly

The specification sheet records an ASME certification for this unit. It is worth being precise about what that normally covers: ASME coding applies to a pressure vessel, and this configuration ships without a receiver tank. If an ASME-coded vessel is something your inspector or insurer will be asking about, the question belongs to whichever receiver you plumb this into, and we are happy to confirm what the certification on this SKU actually refers to before you order. Beyond ASME, our product data records no independent electrical or equipment safety listing for the packaged machine. If your jurisdiction, insurer or corporate standard requires an independent third-party listing on installed shop equipment, verify it before purchase rather than at inspection.

Shipping and Delivery

This unit ships as freight within the lower 48 states, and freight is quoted live at checkout from your delivery address rather than estimated on this page. At 1,437 lbs it is a dock-or-forklift delivery: you must be able to receive and unload it, or take collection from the carrier's terminal. A delivery to a residential address carries a residential fee, shown at checkout where it applies. Inspect the crate before you sign and record any damage on the bill of lading at the point of delivery — signing a clean bill of lading makes a concealed-damage claim very difficult, and a few photographs taken before the driver leaves cost nothing and settle most disputes.

Warranty

Quincy's published cover for this unit is 1 Year consumer and 1 Year commercial as standard. An extended 3 Year factory warranty is available, and the True Blue 5-Year warranty applies when the machine is commissioned by a Quincy authorised start-up. That last condition is not a formality — the longest term on offer is tied to who performs the start-up, so decide about commissioning before the machine is energised rather than afterwards. Whatever the term, do not disassemble the airend, the dryer circuit or the motor before a claim has been opened and assessed; a stripped assembly is routinely treated as an unverifiable fault. Keep your commissioning paperwork and fluid change records together, because both get asked for.