The main consideration in piping for such systems is to provide smooth internal configuration so as to reduce pressure loos at the high velocities involved and to minimize abrasion. Ordinary pipe with threaded fitting, being of smaller diameter than the female thread, presents a discontinuity which increases pressure loss and may be a point of rapid abrasion.
For dust exhaust systems, a good dust collector and primary separator should be mounted ahead of the exhauster to minimize erosion of the precision blades and subsequent loss in performance. Final balance of the system can be achieved by varying the length and diameters of the small flexible hoses.
It must be emphasized that although data are empirical, LVHV systems require the same careful design as the more conventional ones. Abrupt changes of direction, expansions, and contractions must be avoided, and care must always be taken to minimize pressure losses.