Wet and dry abrasive media blasting system

Abstract

A wet and dry abrasive media blasting system comprises a compressed air supply providing a supply of blast air and pot air. The blast air is communicated along a blast air supply line and pot air is communicated along a pot air supply line. A blast pot is configured to receive abrasive media and pot air and release abrasive media at a discharge and into a media conduit which communicated abrasive media to a mixing device. An air pressure amplifier disposed on the pot air supply line is adapted to selectively increase the air pressure of a pot air head creating an over-pressure, such that the over-pressure which is pressure of pot air head less the pressure of the blast air is positive. The blast air and the abrasive media are mixed together in the mixing device to form a blast air media mixture which is communicated to a nozzle and discharged from the nozzle as a blast spray. The system further includes a metering valve disposed on the media conduit, downstream of the discharge, and up stream of the mixing device, the metering valve selectively controls the flow and therefore the amount of abrasive media communicated to the mixing device.

Dependencies are inferred from the claim text.