Method of control of rate of delivery of powder carried by an air jet, uses solenoid valves in main air inlet and in dilution air inlet, controlled by a regulator which uses a formula to compute allowed air flows

摘要

The regulation is provided by two proportional solenoid valves (12,13) one at the main air inlet (7) and the other at the dilution air inlet (8). The solenoid valves are controlled by a regulator (11), using a set value for powder flow (Dp) and determining flows of injection air (Dai) and dilution air (Dad), using the formula Dp = A