DUAL-PRESSURE PNEUMATIC SYSTEMS

The source of air in a typical pneumatic system is an electrically driven air compressor. Most pneumatic systems can be serviced with a compressor sized under 10 horsepower. The most efficient air compressors in this size range are piston-style reciprocating units.

Regardless of the design of the compressor, the need for clean, dry, and oil-free air is essential to ensure that the air lines, controllers, switches, relays, restrictors, and other components in the system remain clean and operate satisfactorily. For this reason, a number of related devices, such as coalescent filters and refrigerated driers, are necessary in a system to remove any oil vapors and dirt particles and to dry the air. Even the use of oil-less air compressors does not guarantee that oil will not be present in the system. Often, the compressor intake air may con~ oil vapors that can pass through the compressor and condense into harmful droplets in the system if removal devices are not employed.

TO UNDERSTAND MORE ON THIS SUBJECT, GO TO THE ONLINE STORE AND OBTAIN YOUR COPY OF TECHNICAL INSTITUTE MANUAL 3.

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