Annular gap nozzle for viscous fluid metering has circular section flow channel with defined flow resistance

摘要

The annular gap nozzle for viscosity metering uses a circular section flow channel (4) formed between a sleeve (6) and inner core (5). Fluid is fed to and from the channel by a bore (1) in an insert (2) above the channel. The flow resistance in the channel is greater than that in the feed and return passages above it.