| 摘要 |
<p>The procedure allows for changing products in an installation for projecting a coating product. A conduit (2) supplies a projector (3) with the product. The operation includes a phase of filling the conduit with a new product, whilst the downstream end (T,P) of the conduit is kept closed. The system includes an arrangement of valves (B,B',T,P) enabling the conduit to be filled after evacuation of air from the conduit via a purge valve (P). Supply of the new product is controlled by one of a number of colour valves (C1-n). A flow meter (4) determines the quantity of product to be introduced into the conduit during the filling phase.</p> |
