This equipment includes a pneumatic inner cone, in the lift when the play the role of bridge damage, lowered RIBC containers with brass stop valves close together play a role. Take-off and landing by controlling the frequency of cone-shaped valve to control flow.
     In the 80's, because there are many imitators and competitors makes this technology out of the market gradually. It is the traditional discharge valve and a transition, the early equipment is still there are some inherent problems. Ideally, the brass gate valve should be the simpler, the better components, and isolation with the powder flow. However, some companies Matcon and other design components have nearly 100 contacts with the powder flow, easily lead to product contamination and cross-contamination.
     Since many parts are immersed in powder flow, the high probability of failure, and early design of the maintenance required is also very strong. Another major problem is that there may be small cone layer of the movement, destruction of the nozzle and the sealing RIBC.
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