FLOW NOZZLES. INTRODUCTION. It’s a venturimeter without it diverging cone. Principle behind flow nozzles is same as in case of orificemeter and venturimeter – Bernoulli's principle. Made of generally gun metal, stainless steel or monel metal. Flow Meters. Orifice Meters Venturi Meters
mass in = mass out
b.) Bernoulli’s Eqn.
Total energy/ pressure is constant throughout