N/A When purchasing an air compressor, many people often ask:

"Is a rotary screw or reciprocating compressor right for me?"

Today, the choice of air compressors is abundant. A number of factors determine the answer to this question, including the operating requirements, application, and budget.

Ideal for constant-volume applications, rotary screw compressors are used extensively in applications above 30 horsepower and are often limited to a maximum air pressure of 150 psig. Rotary screw compressors typically have a higher initial cost than reciprocating compressors and require costly maintenance programs. Common advantages include a low noise level, low vibration, and 100% duty cycle.

Reciprocating (piston) air compressors are widely considered as 'work-horse' compressors. They may be seen in the corner of the garage, in auto body and tire shops, woodworking facilities, hospitals, construction sites, amusement parks, and industrial facilities. Industrial reciprocating compressors are able to operate in a severe duty environment, have lower initial costs, lower maintenance costs, and are ideal for intermittent duty operation. They save energy in no-load conditions and operate efficiently at partial loads, which results in a higher overall efficiency for many diverse applications. Piston compressors are more forgiving than rotaries and normally operate more dependably in less than ideal conditions.

Historically, it was not possible to provide the benefits of a reciprocating compressor in a low noise application. For this reason, rotary screw compressors have been misapplied in intermittent duty applications, resulting in frequent downtime, inefficient operation, problems with condensate, and higher maintenance costs.

N/A The Engineering Challenges of Quiet Enclosed
Heat Control

The majority of reciprocating compressors’ discharge temperatures can reach a 400º F level or higher. Locating a compressor and motor together in the same cabinet requires a creative heat control solution. The heat from the compressor operation increases the electric motor operating temperature, thus reducing the motor’s service life and long-term reliability.

The Evolution 5 and 7.5 horsepower solution offers two separate cooling circuits with each one pulling cool ambient air. With the electric motor operating in its own isolated area of the package, Evolution ensures the temperatures outlined by the motor manufacturer are not exceeded. Reliability and quiet operation are the result of this impressive engineering solution.

Vibration Minimization

A one-piece powder coated inner base supports both the compressor and the motor. Rubber vibration isolators separate the inner base from the enclosure for maximum noise and vibration control. The sound attenuating enclosure, made of 16 gauge steel with additional foam insulation, enables the compressor package to run quieter. Additional vibration pads between the enclosure and the tank are added for unmatched quiet operation.

Sound Testing

With a commitment to research and development, Champion provides our customers with products which uphold our tradition of quality and proven results. As part of the new product development process, the Evolution has passed extensive design reviews as well as performance, endurance and sound testing requirements.

N/A Competitive Advantages & Customer Benefits

1. Separate compressor and motor chambers with dedicated cooling circuits for cooler operation and longer life.
2. Oil site gauge for ease of monitoring and service.
3. Integrated heavy-duty air cooled aftercooler for up to 65% moisture removal.
4. Filter maintenance indicator provides user-friendly monitoring. The graduated indicator monitors the compressor air filter. The position indicator progressively fills the window as air filter restriction increases and indicates the need for a filter change.
5. Industrial grade compressor incorporates unique features including gasket-less cylinder/head design, stainless steel valve disks and tapered roller main bearings for superior dependability.
6. Innovative belt tensioning system for easy service.
7. Axial flow fan for superior cooling of electric motor.
   • Superior 24-hour service support and genuine replacement parts.
   • Incredible Five-Year warranty.

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• Auto body & tire shops
• Woodworking facilities
• Agriculture
• General Industrial
• Dry cleaning

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• Magnetic starter for thermal overload protection
• Manual tank drain
• Standard start/stop control
• Sound attenuating enclosure for low noise operation
• Front and back panels can be easily removed for fast and easy service access
• Ball valve on crankcase drain for easy maintenance of lubricant
• Package easily fits through a standard 36" door
• 80/20 duty cycle

• Multi-finned cylinders for cooler operating temperatures resulting in long life and consistent performance.
• Two compression rings and one oil control ring to ensure low oil carry-over and provide efficient air delivery.
• Large-diameter finned tubing with the greatest cooling effect between stages for maximum compressor efficiency.
• Pressure relief valves located in inter-stage intercooler and discharge line for safe compressor operation.
• Precision balanced flywheel with cast fan blades for optimum compressor cooling and longer life.
• Removable manifolds for easy serviceability.
• Balanced rugged ductile iron crankshaft with large diameter throws for minimum bearing loads and counterweights to minimize vibration.
• Rugged cast iron oil reservoir with convenient sight gauge glass, corner oil fill boss and large oil drain for user-friendly serviceability.
• A pressure switch allows the compressor to start unloaded every time. This ensures the lowest amount of starting torque is required by the electric motor.

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• NEMA 4 Starter/Pressure switch
• Moisture Separator
• Dual Control
• Low Oil Level Shutdown
• High Temperature Shut Down
• Electric Tank Drain
• TEFC Motors
• Tank Vibration Isolators

N/A Competitive Advantages & Customer Benefits

1. Integral cylinder and head eliminating the possibility of blown head gaskets for leak-free, trouble-free operation.
2. Balanced aluminum alloy first stage piston(s) are weight matched to the cast iron second-stage piston(s) for proper balance and minimized vibration. Unique domed piston design for maximum air delivery and efficiency.
3. Lightweight, high-density, die-cast aluminum alloy connecting rods for minimal reciprocating weight. Precision-bored crankpin bearing and piston pin needle bearing are used to properly distribute bearing loads for longer bearing life than bushings.
4. Industrial grade, reliable, high-flow, low lift disc-type valves are made of corrosion resistant Swedish steel to ensure years of trouble free operation.
5. Tapered roller-type main bearings, providing full contact and support of the crankshaft, ensuring compressor durability and long-life.