EMCO ISA Nozzles are used as primary elements in flow measurement of steam, liquid and gas according to the differential pressure principal and in accordance with ISO 5167-3. In the ISO 5167-3 standard the geometry and method of use are specified for nozzles to determine the flow-rate of the flowing liquid in the conduit when the nozzles are inserted in a conduit. The ISA 1932 nozzle is made from a solid bar welded into a pipe section. The fact that it is constructed in this way makes it less material intensive compared to a Venturi Nozzle which is made from solid bar. Providing high accuracy and inducing little permanent pressure loss, the ISA 1932 nozzle has certain advantages which makes it particularly well suited for the following: The Type DES is designed with single pressure tapping, in an all welded construction. Construction with carrier ring also available, ask for ISA 1932 Nozzle type DRS.