KROHNE Summit 8800 Vol 2 - Manual (Page 26)

26 www.krohne.com 08/2013 - MA SUMMIT 8800 Vol2 R02 en
SUMMIT 8800 METERING PRINCIPLES 03
3 .3 .2 Venturi nozzle
The venturi nozzle has a trumpet shape restriction ending up in the pipe..
Figure 8 Venturi Nozzle
The main advantage of the venturi nozzle is pressure recovery.
ISA 1932 nozzle
Typically used for high velocity, set by ISO 5167 to determine the flow of fluid.
Long radius nozzle
A variation of the ISA 1932 nozzle, with a convergent section as the ISA 1932 nozzle and diver-
gent section as a classical venturi
Cone or V-cone meter
The shape of the cone is to stable the flow profile in order to accurately measure the fluid re-
gardless of flow properties.
Figure 9 V-cone meter
3 .4 Coriolis meters
The Coriolis effect is the deflection of a fluid by a rotating effect. If the rotation is clockwise, the
deflection is to the left, if counter-clockwise, the deflection is to the right.
Coriolis meters use a vibrating meter tube to generate the rotating effect and measure the de-
flection to calculate the mass passing through the meter.