Long Radius Nozzle

Long Radius Nozzle

Long radius nozzles are used as flow elements for flow measurement of aggressive and non-aggressive gases, steam and liquids.

Long radius nozzles consist of a rounded inlet section and a cylindrical throat. The rounded inlet section has the shape of a quarter ellipse. The pressure tappings are situated in the pipe at 1D in front of and 0,5D behind the nozzle (D=pipe inner diameter). Usually, they are manufactured on site. This long radius nozzle type is designed to be mountable between flanges.

ISA-1932-NOZZLE

The ISA 1932 Nozzle is used for high velocity, non-viscous, erosive flows which would wear or damage an orifice plate. Typically nozzles have a larg capacity and well accuracy with high velocity flows.The required straight inlet section is much less than an orifice and the discharge coefficient of the nozzle is such that a nozzle can measure approximately 55% higher flow rates than an orifice plate with a similar beta ratio and design differential pressure. ISA 1932 Nozzles have a smooth centrical inlet leading to a throat section with sharp outlet. The length of the ISA Nozzle depends on the Beta-Ratio. The lower the ratio the less the length. The ISA 1932 Nozzle can also be clamped between flanges (within the bolt circle). Also the opportunity of a complete meterrun with a weld-in ISA 1932 Nozzle is possible. All design alternatives can be achieved with annular-chambers.