Moisture entering the exhaust outlet of a pipe can cause many problems with an engine and its components. This is why many exhaust applications utilize a rain cap to deflect water away from the outlet of the exhaust pipe. When the exhaust pipe is pressurized the rain cap lid opens, allowing the exhaust to escape, then shuts automatically when the exhaust ceases. DME manufactures custom rain caps to suite any application, and has even recently developed a new design for their rain caps which you can read about here.
The rain cap is an extremely effective method of preventing water from entering an exhaust pipe; however it does have a drawback in certain situations. As the rain cap lid closes, the lid may cause a metallic ‘clank’ sound.
Eastern Municipal Water District (EMWD) of Southern California began to receive complaints from nearby residents who were disturbed by the sound of the rain cap lids. Because the prevention of moisture entering the exhaust pipe is extremely important, EMWD contacted DME for assistance. Engineers from DME visited the EMWD facility, and examined the issue.
Once back at the office, DME designed a new solution that not only eliminated the metallic clank sound, but was able to eliminate all moving parts.
DME named the new design a ‘fixed rain shield’, and it works by diverting the water away from the pipe rather than blocking it off entirely. Through a series of openings on the side of the unit, exhaust escapes from the pipe silently. Installation of the fixed rain shield is extremely easy and very similar to the installation of the standard rain cap.
To find out how DME can assist you in supplying products specifically designed to your needs, contact us today!