Dosch - Model (ISA 1932) EDUB 800 / EDUA 800 - Weld-in Nozzle
From Flow - Differential Pressure Flow Elements
Weld-in ISA 1932 nozzles are used as flow elements for flow measurement of aggressive and non-aggressive gases, steam and liquids.
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Design
Weld-in ISA 1932 nozzles are mainly used for high pressure, high temperature applications, especially in power plants.
The pressure tappings can bedesignedassingle bore holes (EDUB800) or as a ring chamber(EDUA800). If requested, we can weldinlet and outlet pipe sections to the nozzle. These pipe sections are usually provided by the customer. The weldingseamsare mechanically processed in order to meet the surface roughness requirements of the respectivecalculation standard.
Advantages
Weld-In flow elements are the recommended choice for high pressure and high temperature applicationsbecause they minimizeleakage.
The single bore tappings (EDUB800) are easy to clean and thus suitable for process fluids which may accumulatedirt,become resinous or for plants which are not operating constantly. The ring chamber design (EDUA 800) ensures that the pressure values are averaged over the cross section. This results in a steady measurement signal.
Measuring Uncertainty
Approx..0,8% -1,2% of the dischargecoefficient C, depending on the application.
Pressure Loss
The pressure loss depends on the diameter ratio β(d/D) and amounts toapprox.30 -80% of the differential pressure.
Nominal Diameter (ISO 5167)
DN 50 to DN 500 / 2“ to 20“ (if requested other sizes are possible)
Pressure Rating
PN 40 toPN 400 / 150# to2500# (ASME)
Connection Type
Weld preparation according to EN ISO 9692 (DIN 2559), ASME B16.25 or customer standard.
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