A tip component of a powder blasting device comprising a powder delivery portion and a detritus evacuation portion (evacuator tube) which may be formed as a single unit. The powder delivery portion comprises a mixing chamber, an inlet port and an outlet port. A gas delivery conduit extends to the inlet port. A discharge conduit extends through the outlet port and is movable to selectively seal powder within the mixing chamber. The detritus evacuation portion comprises an elongate tube. An adapter component comprises a pressurized-air delivery portion and a vacuum portion, formed as a single unit. A pressurized air source provides pressurized air to a pressurized-air delivery portion of the adapter component; and a vacuum source provides vacuum to a vacuum portion of the adapter component. An evacuator handpiece may be disposed between the vacuum portion of the adapter component and the evacuator tube of the tip component.