No matter how many precautions are taken during assembly and installation or servicing of a system, contaminants such as acid, moisture, resin and wax can find their way into the system. Emerson system protectors provide: Reliable and longer lasting protection by: Shielding compressors and controls from chemical impurities and debris;Keeping the system clean and running at peak efficiency for a trouble-free operation.Wide range of choices Various types of filter drier and hermetic moisture indicators to suit your every need;Other complementary product offerings include accumulators and mufflers.