accelabar brochure-yoko 1-07.pdf
Transcript of accelabar brochure-yoko 1-07.pdf
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No Straight Run RequiredThe Acce la ba r c a n be us ed in extreme ly limited s traight
run piping co nfigura tions. The s traight run is integral to
the me ter. The s ta biliza tion a nd linea riza tion o f the veloc ity
profile within the throat of
the nozzle eliminates the
need for any upstream run.
EngineeringSpecifications Low velocity flow rates
High acc urac y:
to 0.50%
Repeata bility: 0.050%
Verified flow co efficients
No ca libration req uired
Extended turndown
No s traight run
requirements
Low permanent
pres sure los s
Mas s o r volumetric flow
Actual Application (see d ata on page 4)Application: 3 S ch 40 Natural Ga s
Operating Pressure/Temperature: 50 P S IG /70 F
Max/Min Flow Rate: 60,000 S C FH/1,000 S CFH
Flow Turndown: 60:1
Straight Run: 0
How the Accelabar WorksThe Acc elaba r cons ists of a uniq ue toroida l nozzle des ign
and a Verab ar ave ra ging pitot. The nozzle has a pa tented
straight run settling distance that accelerates, linearizes
a nd s tab ilizes the velocity profile s ense d by the Verab ar.
The Verab ar loca ted within the noz zle ac curately mea sures
a nd significa ntly increas es the d ifferentia l pres sure output
to increa se the ope rating ra nge (turndow n). The Acc elaba r
has a constant flow coefficient and produces an accuracy
of up to 0.50%.
Other manufac turers claim high accurac y, but over
a l imited turndow n.
The Unique Accelabar Flow Meter
The Accelabar is a new and unique flow meter that com bines two d ifferential pressure
techno logies to prod uce op erating ranges never before attainable in a single flow m eter.
It is capab le of generating high d ifferential pressures for
measuring gas, liquids and steam at turnd owns previously
unattainablewith no straight run requirements.
Stabilizing &linearization section
Toro ida linlet
Accelabarnozzle
RTD(optio
Verab ar
Diffusercone
FLOW
US Pa tent No. 6,868,741B2 a nd various foreign pa tents pending.
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Verabar Provides the Accuracy
The proven tec hnolog y of the Verab a r ma kes
the Accelabar work. It accurately measures the
flow ra te w ithin the noz zle. Its uniq ue b ullet s hape ,
constant flow coefficient, solid one-piece construction,
non-clog design and signal stability make it the
only design capable of producing the overall
performance.
Verified Accuracy andFlow Coefficients
Empirical test data from independentlab oratories verified a n a nalytica l mode
and flow coefficients as constant and
independent of Reynolds Number
and within 0.75% of the predicted
value over a flow turndow n of 65:1
(se e a ctua l tes t). This eliminat es
the need f or cal ibrat ion.
0.500
0.490
0.480
0.470
0.460
0.450
0.440
0.430
0.420
0.410
0.400
Published Flow Coefficient: 0.4568Reynolds Number Range: 6,517 to 438,160Flow Turndown: 65 to 1DP Turndown: 2,293 to 1 (0.111 H2O to 255.51 H2O)
FlowC
oefficient
(K)
Flow TestAccelabar Flow Meter
Flow Coefficient vs. Reynolds NumberDate 8-21-02
Accuracy0.75%Flow Turndown 65:1
0 50 100 150 200 250 300 350 400 450
Reynolds Number 1,000
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Comparative Analysis vs. Other Flow MetersThe Acce la ba r fills the ne ed not pres ently be ing filled
by other flow meters for applications that:
Do not have sufficient velocity to produce a read ab le
signa l or sufficient turndo wn Req uire the highes t ac curac y over an extended range
Have little or no s traight run piping b efore the meter
The Acc elaba r performa nce
cha rac teristics far exceed
those of other DP meters,
vortex meters and many
other flow meters.
These c harts show the actual
performance characteristics
of the Accelabar versus other
flow meters b as ed on the
follow ing flow co nditions :
Accelabar Increased VelocityFluid Velocity Pipe Line vs. Accelabar Throat
Flow TurndownAccelabar vs. Vortex
Flow TurndownMaximum & Minimum
Minimum Straight Run Requirements
Permanent Pressure Loss
DP at Maximum FlowInches H2O 3 Natural Gas 60,000 SCFH
Fluid Natural Gas
P ipe S ize 3 S ch 40
Ma x Flow 60,000 S CFH
S G 0.6
P res sure 50 ps ig
Tempera ture 70 F
P ip e Line Ve lo c ity 74 ft/s ec
Flow Conditions
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Accelabar Model Selection1. Furnish your flowing co nditions. A flowca lculation is req uired to d etermine the
DP a nd ve rifica tion o f the op erating limits.
Each meter size has a s tandard beta rat io
sized for the optimal operating range.
The ma ximum ope rating limits a re de ter-
mined by the Accelabar flow calculation.
2. If your flow ing c onditions e xcee d the operating limits, a larger or sm aller mod el (meter size) must be s elected.
Ready to InstallThe Acc elaba r is a co mplete flow meter
rea dy to insta ll. It comes co mplete with
single or dual transmitters depending on the
turndow n req uirements .
An op tiona l RTD is s upplied in a Thermo w ell
for dynamic c ompens a tion (req uired for use
w ith multiva ria ble trans mitter).
Specifications
Chart A
Meter SizeVerabar Face to Face L*Sensor 150# 300# 600#
3 (75mm) -05 1/2 13.78 14.53 15.28
4 (100mm) -05 1/2 15.15 15.90 17.65
6 (150mm) -10 1 19.15 19.90 21.90
8 (200mm) -10 1 21.40 22.15 24.40
10 (250mm) -10 1 23.15 24.40 27.65
12 (300mm) -10 1 26.17 27.78 29.67
AF FlangedModel
Single Transmitter
Dual Transmitter
Flowing Conditions
*Density is not required for steam applications.
General Data Fluid Parameters Ma ximum Norma l Minimum Units
Ta g number Flow Ra te
P ipe s ize &sc hedule or Pressure
exa ct ID &wa ll thicknessTem pe rature
Fluid na me: Dens ity*
Accuracy Repeatability Sensor, Body & Flange
to 0.50% 0.050% 316S S
Acce lab ar flow nozz le
Graphitepacking
Pa cking follower
Weld ne ckRF flange
Verab ar
Trans mitter
RTD(optional)Retaining
plate
Manifoldhead
L
* Face to fac e dimensions nominal. Custo m lengths a vailable.
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Installation Orientation
Direct Mount Remote Mount
Trans mitter
Trans mitter
Verab ar
Gas
Mount totop of pipe
Steam& Liquid
Mountto
bottomof pipe
Gas
Mount to top of pipe
Steam & Liquid
Mount to bottom of pipe
Instrument tubing&fittings not included
Instrument tubing&fittings not included
Trans mitter
Trans mitter
Verab ar
Manifold
Manifold
Fill tee(steam only)
Instrumentvalves
Verab ar
Manifoldhead
Verab ar
Manifoldhead
6315 Monarch Park PlaceNiwot, CO 80503 USA Phone: 303-652-8550Fax: 303-652-8552 VB-7100F (6/08)
E-Mail: cont [email protected] Website: www.veris-inc.c om Printed in USA
True Perform ance in Flow M easurement
ISO 9001 Cert ified
160 Steam
160 Steam
Gas 160
Gas 160
Dual Transmitter
Transmitter Selection
Accelabar accuracy is percentof rate. The Acc elab a r maintains
a constant flow coefficient over
a w ide range o f flow rates and
differential press ures .
DP transmitter accuracy is
percent of scale. While mos t
Acc elaba r insta lla tions a re eq uipped
with one DP tra nsmitter, s ome ap plica tions req uiring superior ac curac y
over an extreme DP turndown may require a dual DP transmitter
installation.
Single Transmitter