Hydraulic Air Compressor for Service Truck

Two-Stage Compressors

Stellar Two-Stage Air Compressors are an ideal choice for service trucks, offering ample power and compressed air to help you get the job done and boost your productivity and profitability. You can easily operate your essential pneumatic air tools with these versatile, practical, reliable units.

Stellar offers a complete lineup of mobile hydraulically driven two-stage air compressors, as well as single-stage air compressors and rotary screw air compressors. Stellar starts with the highest-quality and longest-lasting compressor pumps available and uses the latest technology to build dependable and easy-to-maintain systems for your work trucks. Rugged and consistent for smooth operation and long life, Stellar’s service truck air compressors (formerly American Eagle branded) have more than 20 years of proven efficiency and durability. You simply can’t go wrong with a Stellar Hydraulic Air Compressor for service trucks.

First-Rate Features

All Stellar Two-Stage Hydraulic-Driven Air Compressors are designed for general compressed air needs and include the following features:

• Cast-iron, one-piece cylinder and head design with no head gaskets to fail
• Domed head design for high efficiency
• Cast-iron crankcase for durability
• Reliable, high-flow disc valves for trouble-free performance and long life
• Heavy-duty, fully balanced pistons, crankshaft and fan bladed flywheel for smooth, cool operation
• Heavy-duty crankshaft main roller bearings for long life
• Oil level sight glass for easy visual check
• Intercoolers for cooling between stages for increased efficiency and life
• High-capacity hydraulic oil cooler and fan for cooler operation
• Canister-type air filters for high capacity and easy changing
• Model 46P includes a durable and attractive white painted steel cover
• The cover features a hinged lid for quick access to all maintenance points
• Five-year limited warranty on compressor (pump) for peace of mind
• Optional hydraulic oil reservoir and/or air tank

Single-Stage Vs. Two-Stage Air Compressors

If you’re debating between a single-stage and two-stage hydraulic air compressor for service trucks (also known as a dual-stage air compressor), you might be wondering what the difference is between the two. The key distinction is the number of times that air gets compressed between the inlet valve and the tool nozzle. The air is compressed one time in a single-stage compressor and two times in a two-stage compressor for twice the pressure. Therefore, two stage compressors are normally used where higher pressure is required.

• A single-stage compressor draws air into the low-pressure cylinder with a piston and compresses it just once at roughly 120 psi per stroke. The compressed air is then sent to a storage tank where it is used to power pneumatic tools and other small-scale applications.
• A two-stage compressor works in the same way, but it has two cylinders for holding compressed air so the compression process is repeated twice. Unlike a single-stage compressor, the air is not transported to a storage tank. Instead, it is sent into a smaller high-pressure cylinder, where a second piston compresses it at approximately 175 psi. From there, the compressed air passes to a storage tank after it has been cooled, where it is reserved for high-pressure applications.

Without a doubt, two-stage air compressors produce higher air power, which makes them the go-to option for large-scale operations and continuous applications. And because two-stage compressors are better able to maintain pressure over extended periods of time and are faster at refilling, they are also more efficient. This means they use less energy to get the job done.