Notarealsignguy
Arial - it's almost helvetica
The military did a study with various mixing valves and settings and charted the media usage and productivity. If I ever run across it again, I'll send it. Proper media adjustment is a hard concept to teach employees and it really shouldnt be. They head straight for more is better. Same with painting, they crank the atomizing pressure way up like more noise equals better paint job.Yes, it is a pressure-hold mixing valve. It works incredibly well and saves both time and media.
The main issue I ran into with other pressure-hold metering valves is that they are not suited for recycled media, which is usually fine and dusty. The Schmidt valves would bind up, and the Clemco valves were not really suited for precision flow control.
People usually joke about sandblasting not being rocket science, but it really is. It is 100% reliant upon fluid dynamics: from the moment a single grain of abrasive falls through the bottom of the pot, until it finally strikes a surface. Nozzle technology is a science all unto itself, as there are thousands of variations for every application under the sun.
JB