Single Stage Air Compressors

Single stage air compressors compress air to final pressure in one piston stroke, delivering a straightforward, cost-effective solution for contractors, DIYers, and specialty applications like fire sprinkler systems. CompressorPros carries electric and gasoline single stage models from 3/4 HP portables to 5.5 HP stationary units across multiple brands. All orders ship free.

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What Are Single Stage Air Compressors?

A single stage air compressor draws in ambient air and compresses it to final pressure in one piston stroke, typically reaching 125-135 PSI. Single stage units are the most common and most affordable type of reciprocating compressor, making them a practical entry point for contractors, home workshops, small maintenance operations, and specialty systems like fire sprinkler air supplies. They serve applications such as framing, roofing, tire inflation, blow-off, and running intermittent pneumatic tools where continuous high-volume and high pressure airflow is not required.

Electric vs. Gasoline

The most fundamental decision when choosing a single stage compressor is the power source.

Electric Single Stage Compressors

Electric single stage compressors run on 115V or 230V single phase power and are the standard choice for shops, garages, and indoor work spaces with reliable electrical access. They produce no exhaust, require no fuel, and are generally quieter than gasoline models. HP ratings typically range from 3/4 to 5 HP, and tank sizes from 20 to 80 gallons. The Quincy 151C60VC 5 HP Single Stage 60 Gallon Air Compressor is a strong choice for a stationary setup.

Gasoline Single Stage Compressors

Gasoline single stage compressors are built for job sites and remote locations without electrical power. They are the go-to for roofing crews, fencing contractors, and mobile service operations. Most gas models use Honda or similar commercial engines for reliable field starting and long run times. The Jenny K5HGA-8P 5.5 HP Honda Gasoline Driven Single Stage Portable Air Compressor is one of the most popular gas-powered portables on the site, purpose-built for contractor use.

Types of Single Stage Air Compressors

Portable Single Stage Compressors

Portable models mount on wheeled carts or frames with handles and are designed to move between work locations. Tank sizes typically range from 5 to 30 gallons, and they are available in both electric and gasoline configurations. These serve contractors, mobile technicians, and anyone who needs compressed air at varying job sites.

Stationary Single Stage Compressors

Stationary single stage compressors mount on vertical or horizontal tanks from 30 to 80 gallons and are intended for a fixed installation in a shop or garage. They deliver higher CFM than most portables and are well-suited to home workshops, small auto repair bays, and light manufacturing stations. The BelAire 6061V 3.5 HP Single Stage 60 Gallon Air Compressor is a representative stationary option for shop use.

Hand Carry Single Stage Compressors

Hand carry models are the most compact single stage units, designed to be lifted and carried by one person. They use small tanks (typically 2-8 gallons) and weigh under 80 pounds. These are practical for trim carpenters, finish nailers, and technicians who need a lightweight, portable air source. The Mi-T-M AM1-HM04-05M 4 HP Gasoline Driven Single Stage Hand Carry Air Compressor is a gas-powered hand carry option for field work without electrical access.

Fire Sprinkler System Compressors

A specialized subset of single stage compressors designed to maintain air pressure in dry and pre-action fire sprinkler systems. These units run on 115V or 230V power, include UL/FM-approved controls, and are built for continuous standby operation. The Jenny K15S-30UMS 1.5 HP Single Stage Fire Sprinkler System Air Compressor is a widely specified unit for this application.

Key Specifications

CFM (Cubic Feet per Minute): Single stage compressors typically deliver 18 CFM or less at 90 PSI depending on HP and pump design. Add up the CFM requirements of every tool you plan to run and select a compressor with at least 50% headroom.
HP (Horsepower): Ranges from 3/4 HP for small hand carry units to 5.5 HP for larger portables and stationary models. Single stage compressors above 5 HP are uncommon because higher-demand applications are typically better served by two stage units.
Tank Capacity (Gallons): Hand carry models use 2-8 gallon tanks. Portables range from 8 to 30 gallons. Stationary single stage units use 30 to 80 gallon tanks.
Max PSI: Most single stage compressors deliver 125-135 PSI. Applications requiring higher pressure (up to 175 PSI) generally call for a two stage compressor.
Voltage: Electric models are available in 115V (convenient for standard outlets) and 230V (required for units above about 3 HP). Gasoline models do not require electrical service.

Brands Carried

Jenny: Broad single stage line including gas portables, electric stationary units, and UL/FM-listed fire sprinkler compressors.
Quincy: Single stage shop compressors known for cast iron construction and long service life.
BelAire: Single stage stationary compressors in the 3.5-5 HP range with vertical and horizontal tank options.
Mi-T-M: Gasoline and electric single stage portables and hand carry units for contractors and field service.
C-Aire: Competitively priced single stage compressors across the small to mid-HP range.
Chicago Pneumatic: Single stage electric and gas models for contractor and light industrial use.

CompressorPros holds direct manufacturer contracts with each brand.

FAQ

What is the difference between a single stage and a two stage air compressor? A single stage compressor reaches final pressure in one piston stroke, typically maxing out at 125-135 PSI. A two stage compressor compresses air twice with cooling in between, reaching up to 175 PSI with greater efficiency under sustained loads. Single stage units cost less and are well-suited to intermittent use; two stage units are the better choice for continuous-duty shop work.

What is the most common mistake when buying a single stage compressor? Buying one when a two stage would be more appropriate. Single stage compressors are designed for intermittent-duty applications with moderate CFM demand. If you plan to run air tools continuously for extended periods, a two stage unit will deliver more CFM per HP, run cooler, and last longer.

How long do single stage air compressors last? With proper maintenance, including regular oil changes, belt inspections, and tank draining, a quality single stage compressor can last 10-15+ years in intermittent-duty service. Aluminum pumps are common on single stage units and are lighter but generally have shorter pump life than the cast iron pumps found on most two stage models.

Can a single stage compressor run a spray gun? It depends on the spray gun's CFM requirement and the compressor's output. Small touch-up guns with low CFM draw can work with a 3-5 HP single stage compressor and a tank large enough to buffer demand. Full-size production spray guns typically require more CFM than a single stage unit can sustain.

Do I need a gasoline or electric single stage compressor? If you have reliable electrical power at your work location, electric is generally the better choice: lower noise, no fuel cost, no exhaust. If you work at construction sites, rooftops, or remote locations without power, a gasoline model is essential.

Does CompressorPros offer free shipping on single stage compressors? Yes. All orders ship free, direct from the manufacturer, on every unit in this category.

Shop Single Stage Air Compressors at CompressorPros

CompressorPros carries single stage air compressors in electric and gasoline configurations, from compact hand carry units to stationary shop systems and UL-listed fire sprinkler compressors. For buyers who need higher PSI or continuous-duty output, two stage air compressors are available. Replacement single stage pumps can be found in the parts section. All orders ship free, direct from the manufacturer.

If you need help deciding between a single stage and two stage compressor for your application, call (803) 339-0445 or email info@compressorpros.com.

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