In a commercial system, the compressor bypass pulley is the heart of the device. When an air compressor in a commercial system is in use, it does not function correctly and there are a number of problems that can occur. They will be addressed in this article; the most common issue is a not working one of these bypass pulleys.
The most typical pulley uses a motor that pushes the pulley to the correct speed and then a belt that is attached to the pulley and pulls it to the appropriate position at which it will work. The standard size is a twelve-toothed disk. The pulley is either manually turned or by a motorized screw drive that turns the pulley on a pulley wheel and controls it from a distance by adjusting the screw. The types of bypasses that are available will allow you to use a screw driven bypass pulley. This type of bypass pulley is attached to the back of the bypass port. There are two types of screw driven bypass pulleys: the automatic screw and the hydraulically driven.
When you are looking for an automatic screw bypass pulley, look for any kind of indicator lights and a serial number. The automatic screw has no lights or indicator lights because the manual rotation is made possible by a motor on the screw that is controlled electronically. Hydraulic bypasses have more lights and an indicator light. The valves are housed in a housing and they have indicator lights on each one. Look for other types of lights and markings if you are using a bypass port. If the ports are left open, there is a chance that an electrical short circuit could occur, which will cause an on/off action to happen. Most compressors with automatic bypass pulleys have a built in protection mechanism that shuts off the engine if a failure occurs.