EMCO venturi nozzles and venturi tubes have specific uses and are often used as primary elements in flow measurement of steam, air, liquid, vapor, chemical substances and gas. Venturi nozzles and Venturi tubes applies the Venturi effect, which is the limitation of liquid pressure caused by a narrowed section of a pipe when a fluid flows through it. The design and construction of a Venturi nozzle is based on Bernoulli’s principle and a Venturi nozzle is very stable at high temperature and flow rate. The Venturi effect takes its name after the 18th century Italian physicist, Giovanni Battista Venturi, who is the discoverer of the effect, The way it works is in accordance to the differential pressure principal and in accordance with the ISO 5167-3 standard. The venturi nozzle is available with weld ends or flanged process connection depending on client applications and requirements. Always produced from solid bar the venturi nozzle is well suited for high-pressure steam boiler applications and is often installed in the main steam pipe between the boiler and the steam turbine. It provides accurate flow measurement and induces less permanent pressure loss compared to the ISA1932 flow nozzle.