 While the technology is intended to reduce turbulence and shear, weir-style valves present a number of issues, for example in upstream processing applications they can be difficult to install, prone to leaks, and increase the potential of product contamination.As such, a weirless diaphragm valve technology was developed by ASEPCO valves, part of the Watson-Marlow Fluid Technology Group.Diaphragm valves can be manual or automated.