Air Compressor Sales - Service - Parts - Rentals

2708 E. Jensen Ave, Fresno, CA 93706

24 Hour

Emergency Service

(559) 485-3184

Associated Compressor and Equipment

24 Hour

Emergency Service

(559) 485-3184

Pressure Lubricated Reciprocating/Piston Air Compressors

A reciprocating air compressor is a positive displacement compressor that uses a crankshaft-driven piston and cylinder to compress the air. A single-stage reciprocating piston compressor works by drawing the air into the cylinder where it is compressed in a single piston stroke of approximately 120 PSI and then sent to a storage tank. A two-stage compressor includes an additional step where the air is compressed by a second, smaller piston to a pressure of up to 175 PSI.



Our premium, top-of-the-line pressure lubricated piston air compressor is the QR-25. It’s a heavy-duty compressor that is pressure lubricated in all critical areas and delivers up to 25 hp. Available in single- and two-stage versions, the QR-25 is designed to operate at slower speeds and is equipped with intake loaders that minimize work. The rugged cast iron construction ensures a long life expectancy, less downtime and easier maintenance. Other key features include loadless starting, a manually reversible oil pump and rebuildable components. Seen as the industry standard in piston compressor technology, the performance of Quincy’s QR-25 is legendary.

1-25 hp

3-95 acfm, 20-500 psig intermittent

Single & Two Stage

Cast iron full pressure lubricated

5-Year limited warranty



The QP is a two-stage pressure lubricated air compressor featuring a working pressure of 175 PSI for your more challenging air compression applications. Key QP features include a cast iron crankcase, flywheel and cylinder, reliable positive displacement oil pump and high efficiency intercooler. The QP is available in a “standard” configuration Pro Unit, as well as a “fully loaded” Max Unit.

3 to 15 HP

175 PSI Working pressure

Oil filter and pressure gaug

Fully pressure lubricated



Our two-stage splash lubricated QT piston air compressor models are designed to deliver higher volumes of air while also consuming less energy. The special valve design provides the highest possible volumetric efficiency and features super-strong stainless steel valves. The balanced counter-weighted crankshaft ensures smooth operation and fewer maintenance headaches. The cast iron construction also assures a long compressor lifespan. As with our QP line, the QT is available in Pro Unit and Max Unit options.

5-15 hp

17-206 acfm, 175 psig maximum

Two Stage

Cast iron splash lubricated


Climate Control

Our application specific air compressor models include climate control systems that are designed and engineered for efficient and effective climate control in all types of operating environments. The options include Simplex Splash Lubricated Tank-Mount models that include an ASME pressure relief valve, a pressure gauge, a manual shut-off at tank discharge and a manual tank drain. A Duplex Splash Lubricated Tank-Mount model with a Duplex Control Panel and optional dryer is also available.


4-88 acfm, up to 100 psig service

Single & Two Stage

2 ppm carry over factory certified


Single Stage

Our stationary and portable single-stage piston air compressors are ideally suited for commercial compressed air applications and smaller DIY projects. Despite their small size, they feature a rugged cast iron construction that ensures maximum durability. Key product features include a cast iron cylinder and crankshaft, an aluminum head and a fully enclosed belt guard.

2 & 3.5 hp

7.1 to 12.4 acfm

110 to 135 psi

Single Stage

We Offer a Wide Selection of Reciprocating Air Compressor Parts

Associated Compressor & Equipment is your one-stop source for all of the reciprocating air compressor parts you need to keep your unit up and running, whether you need fluid for maintenance, an air compressor piston, pump, belt or other vital part or component.

Contact us to learn more about our tough, tougher and toughest piston air compressor options.

Learn more about properly maintaining your reciprocating air compressor.