Fluidics: The Answer To Problems Of Handling
Hazardous Fluids
Author(s)
V. Tesař
Abstract
Dangerous fluids must be kept within a containment. This may be a problem in
emergency situations which almost inevitably happen from time to time in
mechanical pumps and flow control valves due to material fatigue, seizing, or
screws getting loose. During maintenance and repair the fluid may be exposed. A
solution is offered by no-moving-parts maintenance-free fluidics. Three classes
of devices are discussed: A) passive flow controllers, B) valves controlled by an
external signal, C) fluidic pumps driven by alternating flow.
Keywords: hazardous fluids, fluidics, fluidic pumps, fluidic valves.
1 Introduction: handling dangerous fluids
The essential rule of handling dangerous liquids and gases – hot, poisonous,
chemically aggressive, explosive, radioactive, or biologically pathogenic [1] – is
keeping them inside a protective enclosure. Not always considered is the
permanence of the containment in exceptional situations, such as during
maintenance or repair, which is almost inevitable with classical mechanical
pumps and flow control devices, operating either by motion or by deformation of
their components. They are prone to failures due to material fatigue, worn seals,
seizure damage, or bolts or screws becoming loose.
2 Fluidic devices
A solution offers no-moving-part fluidics, a technique of generating and
controlling fluid flows by phenomena taking place inside cavities with solid
walls. There is nothing that may seize, be worn, or break. As a result, fluidic
pumps and valves need no maintenance and are extremely reliable for long time.
Keywords
hazardous fluids, fluidics, fluidic pumps, fluidic valves
Related Book
Other papers in this volume
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