Should both internal and external vibration isolation be used in a single application?
It is possible that the internal springs could resonate with the external springs. This could cause damage to the systems. If the application is near a very vibration sensitive area, the internal isolators should remain locked down, as they are when they are shipped. A good rule of thumb is that you can use one or the other, but not both. See “The Pitfalls of Combining Internal and External Vibration to Packaged Air Handling Systems”, also located in the VISCMA Articles of Interest section. 14) Why should I use vibration isolators? All mechanical and electrical equipment generates vibration. Even a small amount of vibration energy traveling through the structure can: • Create unacceptable noise levels in commercial buildings, schools, auditoriums, etc. For example, government standards now require quieter environments for school children to enhance learning. • Affect sensitive equipment such as in hospitals, laboratories and high tech manufacturing facilities. • Lead to damage to the e
