Equipment Built Around Cleaner Fuel
CNG Calumet provides economically priced, pre owned compressed natural gas equipment to businesses, industries, and government entities across the country. We help our customers move toward cleaner, more cost efficient fueling operations.
From Frozen Pizza to Fueling Fleets

CNG Calumet began in an unexpected place, a frozen pizza kitchen. Doreen's Gourmet Frozen Pizza faced rising transportation costs and started looking for a more efficient way to keep its delivery fleet on the road. That search led the company straight to compressed natural gas, and its pickup trucks were converted into CNG powered freezer vehicles known as the Green Pizza Machine Fleet.
For a decade the Green Pizza Machine Fleet operated across the Chicago area and earned regular coverage from local news outlets for its commitment to cleaner, more efficient transportation. Grant funding allowed the company to build an in house CNG station using FMQ compression equipment, and in 2014 it opened a public fueling station featuring Ingersoll Rand technology.
A prospective buyer approached about purchasing the pizza business but had no interest in continuing CNG operations. Rather than let that infrastructure sit unused, the owners kept their warehouse and station and shifted their full attention to reselling pre owned CNG equipment at competitive prices.
CNG Calumet brings that same resourcefulness to every customer, helping businesses, industries, and government entities find dependable, cost efficient equipment for their own fueling operations. We remain grateful for the mentorship of Rick Ridenour, Patrick Rodriguez, and Tony Feger along the way.
Our Inventory
Explore our main equipment categories. Hover over a card, or select it, to learn more about each one.
CNG Compressors
CNG Compressors
Used CNG compressors for sale, built to compress natural gas to high pressure for vehicle fueling and industrial applications. Selected for reliable flow rate and horsepower across continuous duty cycles.
CNG Dispensers
CNG Dispensers
Pre owned CNG dispensers designed for fast, accurate fueling at commercial and public access stations, well suited to fleet depots, transit agencies, and retail CNG locations.
Gas Dryers
Gas Dryers
Natural gas drying equipment that removes moisture before compression and storage, helping protect downstream components and support consistent station performance.
Storage Vessels and Trailers
Storage Vessels and Trailers
High pressure CNG storage vessels and trailers for onsite and mobile fuel storage, supporting stations of every size from small fleet yards to large scale operations.
Complete Fueling Stations
Complete Fueling Stations
Turnkey CNG station packages that combine compressors, storage, dryers, and dispensers into a single fueling solution for fleets, municipalities, and industrial users.
Parts and Components
Parts and Components
Dispenser hoses, filter housings, pressure relief components, electrical starters, and other CNG parts to keep existing fueling infrastructure running efficiently.
Why CNG
Six reasons businesses are exploring compressed natural gas for their fueling needs. Hover over a card, or select it, to learn more about each one.
A Cleaner Alternative
A Cleaner Alternative
Compressed natural gas can produce fewer emissions than conventional gasoline and diesel in certain applications. For businesses operating fleets or other fuel intensive equipment, CNG can be an alternative fuel option that supports efforts to reduce emissions.
Built for Fleets
Built for Fleets
CNG is widely used for commercial and fleet applications, including vehicles that travel predictable routes and return to a central fueling location. Dedicated CNG fueling infrastructure can help businesses support their day to day fleet operations.
Potentially Lower Fuel Costs
Potentially Lower Fuel Costs
Fuel costs vary by location, market conditions, and application, but CNG can provide an economical fueling option for high mileage commercial fleets. Businesses can evaluate CNG based on their fuel usage, local CNG availability, and overall operating costs.
Reliable Fueling Infrastructure
Reliable Fueling Infrastructure
A CNG fueling station combines equipment such as compressors, storage systems, dryers, and dispensers to provide a complete fueling solution. Properly selected equipment helps support consistent fueling operations for commercial and industrial applications.
An Alternative Fuel Solution
An Alternative Fuel Solution
CNG provides an alternative to conventional gasoline and diesel for qualifying vehicles and applications. As businesses evaluate different fuel options, CNG can be considered alongside other alternative fuel technologies based on their operational needs.
Equipment That Keeps CNG Moving
Equipment That Keeps CNG Moving
From compressors and storage vessels to dryers and dispensers, CNG fueling infrastructure depends on specialized equipment. CNG Calumet focuses on equipment used throughout the compression, storage, and dispensing process.
Frequently Asked Questions
Answers to common questions about compressed natural gas and CNG fueling equipment.
Compressed natural gas (CNG) is natural gas that has been compressed and stored at high pressure for use as a fuel. CNG can be used in vehicles and commercial fleets as an alternative to conventional gasoline or diesel. A CNG fueling system typically includes equipment for compressing, drying, storing, and dispensing the gas.
CNG can offer several benefits depending on the application, including potential emissions reductions compared with conventional fuels, competitive fuel costs in some markets, and suitability for commercial and fleet operations. CNG is particularly useful for vehicles and fleets that have regular fueling needs and access to dedicated CNG fueling infrastructure.
CNG can produce fewer emissions of certain pollutants than gasoline and diesel when used in appropriate applications. The overall environmental impact depends on factors such as the source of the natural gas, vehicle technology, and how the fuel is produced and transported. CNG is one alternative fuel that businesses can consider when evaluating ways to reduce emissions from transportation and fleet operations.
CNG is used in a variety of commercial and fleet applications, including transit buses, refuse trucks, delivery vehicles, municipal fleets, and other vehicles designed to operate on compressed natural gas. CNG can be particularly practical for fleets that follow predictable routes and return to a central location for fueling.
A CNG fueling station uses specialized equipment to prepare and deliver compressed natural gas to vehicles. Natural gas is compressed, processed or dried as needed, stored in high pressure storage equipment, and then delivered through a CNG dispenser. The specific equipment and configuration depend on the station's capacity, application, and fueling requirements.
A CNG fueling station can require several types of specialized equipment, including CNG compressors, storage vessels, gas dryers, dispensers, valves, controls, and other station components. The equipment required depends on the size and design of the station, the available gas supply, and the fueling needs of the application.
A CNG compressor increases the pressure of natural gas so it can be stored and dispensed for use as a vehicle fuel. Compressors are one of the primary components of a CNG fueling station and are selected based on factors such as required pressure, flow rate, horsepower, and station capacity.
CNG storage equipment holds compressed natural gas at high pressure before it is dispensed to vehicles. Storage vessels and storage systems help provide an available supply of compressed gas and can support the fueling demands of a CNG station. Storage requirements vary based on station design, pressure, capacity, and application.
When purchasing CNG equipment, it is important to consider the equipment's manufacturer, model, pressure rating, capacity, specifications, condition, compatibility, and intended application. Buyers should also consider how individual components will work together within their existing or planned CNG fueling infrastructure.
CNG is used across a variety of transportation, commercial, industrial, and public sector applications. Common examples include fleet transportation, public transit, waste and refuse collection, delivery operations, and other businesses that operate vehicles with consistent fueling requirements. The appropriate CNG equipment depends on the specific application and fueling infrastructure.
Ready to Get Started?
Browse our inventory of pre owned CNG equipment or reach out with any questions you have.
