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Nozzle for viscous fluid

Nozzle for viscous fluid

Nozzle for viscous fluid

(OP)
Any tips or informatin sources for designing a nozzle for viscous fluids.  The requirement is to dispense a thick oil (4,000 cp)with a non-drip shut off.  Flow rate will vary from droplets to volumes of 200 ml/min.  Perhaps the crux is to have the dispensed material exit the nozzle straight without being pulled to one side.

RE: Nozzle for viscous fluid

Google "snuff-back valve". There are many manufacturers.

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