High output valve for spot or coat application of cold or hot liquid products e.g. paint, oil - has electromagnetic control and two part designed piston with one part fixed during valve operation and other part moves to valve seat under effect or preloading

摘要

The fixed piston (8) in operation is surrounded by an annular chamber (27), connected with a supply duct (26) for the liquid product. The fixed piston itself after the annular chamber has recesses (28, 29) arranged outwards from the centre, open to the outer circumference of the fixed piston and extending to face the endface of the valve piston (9). The recesses in the region of the fixed piston form the passage opening. The valve piston is designed as a sleeve with a taper at its end face region facing the valve seat (12). Its base faces the valve seat. The wall runs inwards and runs outwards in the region of the base. A further annular chamber (36) provided in the vicinity of the valve seat for the product has slots (33, 34, fig 6) which in the region of the piston (9) together with the inner section of the sleeve form the passage opening. ADVANTAGE - Gives large stroke output, smooth discharge and without overheating leading to possible interference.