Here Inertia base pump installation Inertia bases are used to support mechanical equipment, reduce vibration amplitude, provide for attachment of vibration isolator , prevent differential movement between driving and driven members, reduce rocking by lowering equipment center of gravity, reduce motion of equipment during start-up and shut-down flexible connector , union , balancing cook , strainer , gate valve , supply air , hearing coil , flexible connector , round or rectangular duct transition to vav primary air connection see plan for size , duct transition to vav secondary air connection see plan for size , the device or system of interest is isolated from the source of vibration through insertion of a resilient member or isolation. isolation is a device used for isolating a circuit or equipment from a source of power. An isolation is a mechanical switching device that, in the open position, allows for isolation of the input and output of a device.to operate the relay of circuit breaker. as a substitute for circuit breaker. always independent of the position of circuit breaker. generally on both sides of a circuit breaker.