|
u Thermal
Dispersion Flowmeters:
Thermal Dispersion designs
deliver proven performance and reliability in the harshest
gas environments. The typical sensing element contains two thermowell-protected
Resistance Temperature Detectors (RTDs). When placed in the
process stream, one RTD is heated and the other RTD senses the
process temperature. The temperature difference between the two
RTDs is related to the process flow rate. Based on line size there
may be one or more sensing points in the line. The swirl-free,
repeatable velocity profile created by VORTAB and Vortab Elbow Flow Conditioners
provide the
ideal flow regime for this flow metering technology, which may only
sense flow at one point in the line.
u Ultrasonic Flowmeters:
Ultrasonic flowmeters can be either Doppler effect meters or
time of flight meters. Doppler meters measure the frequency
shifts caused by liquid flow as a signal is reflected off
suspended solids or entrained gas in the fluid. The frequency
shift is proportional to the liquid's velocity. Time of flight
meters use the speed of the signal traveling between two
transducers that increases or decreases with the direction of
transmission and the velocity of the liquid being measured.
The swirl-free, flat, and repeatable flow profile created by VORTAB
and Vortab Elbow flow conditioners provide the ideal flow
regime because the flat velocity profile more closely mimics
and is representative of an average flow rate.
u Turbine Flowmeters:
Turbine flowmeters measure the
rate of flow in a pipe or process line via a rotor that spins
as the media passes through its blades. The swirl-free flat
velocity profile created by VORTAB flow conditioners provides
the ideal flow profile for this flow metering technology. Vortab mitigates rogue vortices from crossing the meter.
u Magnetic Flowmeters: Magnetic flowmeters operate
on Faraday’s Law of Magnetic Induction. This principle states
that a voltage is generated in a conductive medium when it
passes through a magnetic field. This voltage is directly
proportional to the length of the conductor, the density of
the magnetic field, and the velocity of the conductive
medium.
Magnetic
flowmeters generate a magnetic field by passing current through
wires that are mounted outside the pipe. They have
electrodes that detect the amount of voltage as the conductive
fluid passes through this magnetic field. Since this voltage is
proportional to flow rate, magnetic flowmeters use this value to
compute flow rate. Upstream flow disturbances and inadequate
straight run adversely affect performance. VORTAB and Vortab Elbow flow
conditioners provide the ideal solution,
u Pitot Tube
Flowmeters: Pitot tubes
consist of two hollow tubes, where one measures impact
pressure (velocity head plus potential head) and the other
measures static (potential). The swirl-free flat velocity
profile created by VORTAB and Vortab Elbow flow conditioners provides the ideal
flow regime for this flow metering technology.
u Averaging Pitot
Tubes: Averaging Pitot
Tubes work with multiple Pitot Tube sensors and average
multiple sensing points. The swirl-free flat velocity profile
created by VORTAB and Vortab Elbow flow conditioners provide the ideal flow
regime for this flow metering technology.
u Vortex Shedding
Flowmeters: Vortex
Shedding Flowmeters measure the frequency of vortices shed
from a bluff body placed in the flow stream where the
frequency is proportional to material velocity. The swirl-free
flat velocity profile created by VORTAB and Vortab Elbow flow conditioners
upstream of the bluff body provides the ideal flow regime for
this flow metering technology.
|
