Veris Accelabar Brochure - Manual (Page 2)

2
No Straight Run Required
The Accelabar can be used in extremely limited straight
run piping configurations. The straight run is integral to
the meter. The stabilization and linearization of the velocity
profile within the throat of
the nozzle eliminates the
need for any upstream run.
Engineering
Specifications
• Low velocity flow rates
• High accuracy:
to ± 0.50%
• Repeatability: ±0.050%
• Verified flow coefficients
• No calibration required
• Extended turndown
• No straight run
requirements
• Low permanent
pressure loss
• Mass or volumetric flow
Actual Application (see data on page 4)
Application: 3” Sch 40 Natural Gas
Operating Pressure/
Temperature: 50 PSIG/70° F
Max/Min Flow Rate: 60,000 SCFH/1,000 SCFH
Flow Turndown: 60:1
Straight Run: 0”
How the Accelabar Works
The Accelabar consists of a unique toroidal nozzle design
and a Verabar
®
averaging pitot. The nozzle has a patented
straight run “settling distance” that accelerates, linearizes
and stabilizes the velocity profile sensed by the Verabar.
The Verabar located within the nozzle accurately measures
and significantly increases the differential pressure output
to increase the operating range (turndown). The Accelabar
has a constant flow coefficient and produces an accuracy
of up to ±0.50%.
Other manufacturers claim high accuracy, but over
a limited turndown.
The Unique Accelabar Flow Meter
The Accelabar is a new and unique flow meter that combines two differential pressure
technologies to produce operating ranges never before attainable in a single flow meter.
It is capable of generating high differential pressures for
measuring gas, liquids and steam at turndowns previously
unattainable — with no straight run requirements.
Stabilizing &
linearization section
Toroidal
inlet
Accelabar
nozzle
RTD
(optional)
Verabar
Diffuser
cone
F LOW
US Patent No. 6,868,741 B2 and various foreign patents pending.