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The Hope Group Home › Products › Compressed Air › Air Compressors
Rotary Screw
Rotary screw compressors operate on the principle of positive displacement. Filtered air enters the inlet of the airend where two rotors un-mesh. As the rotors re-mesh, the space is reduced on the opposite side of the airend and thus, the air is compressed and moved to the discharge port.

Reciprocating compressors are a positive displacement machine, which means using a piston within a cylinder they increase the pressure of the air by reducing its volume, thus taking in successive volumes of air that is confined within a closed space and elevating this air to a higher pressure

Packaged Air Systems
In recent years, various manufacturers have been stepping up their design and production of "packaged" air systems. It might be more correctly defined as "pre-packaged" systems. These come from the factory with many of the complimentary components for a complete system already mounted on a skid, ready for installation.

Oil-Free compressors are available as rotary screw, piston, and centrifugal designs. The rotary screw utilizes specially designed air ends to compress air without oil in the compression chamber; the centrifugal is oil-free by design with oil lubricated running gear separated from the air by shaft seals and atmospheric vents.

PET Packaged Systems
The Hope Group has over 40 years experience in designing skid-mounted PET package systems to meet a wide range of requirements, including expanded focus on offerings from 1,000 L/M to 40,000 L/M at 40Kg. We have extensive experience with every type of installation, including screw/booster, reciprocating 3-stage, centrifugal, and oil-free screw booster systems.

High Pressure
High-quality high pressure air compressors by Sauer run at ranges from 100 to 5,000 PSI. Engineered for continuous operation in extreme environments, the 3-stage design lowers cylinder compression temperatures, and reduces the pressure ratio per cylinder.


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