1. Is Torbar suitable for my application?
Torbar is suitable for gases, liquids and steam. Some
of the many typical applications include water, natural gas,
flue gas, nitrogen, combustion gases, ventilation air, sea water,
cooling water, crude oil, saturated and superheated steam. Possible
pipe sizes range from ½” (13mm) to 6 metres +.
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2. When is Torbar not suitable?
Torbar is not suitable for applications with
dual phase liquids, high viscosities (above 200 cP) or where
fluids do not fill the cross section of the pipe. Pitot tubes
would not normally be used for Custody Transfer applications
or where very high accuracies are required.
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3. What information is required to provide
a proposal for Torbar?
A project questionnaire is available as a download
from the “Brochure” icon
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4. Do you have a local distributor in my area?
A comprehensive list of our world wide agency network
can be found by clicking the “Contact” icon and
viewing the drop-down list next to “Local agents”
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5. Will contamination by particles in the
media affect the performance of Torbar?
In cases where there are high levels of contamination
in the media, we can supply Purge units which blow air back
through the system to keep the sensor holes clear. Contact Torbar
for details.
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6. Averaging Pitot Tubes are available with
a variety of profiles. What profile does Torbar use?
Torbar uses unique profiled flats around the down stream
hole in order to define the separation point at which the flow
lines “break off”. This feature creates a stable
pressure area at the downstream pressure sensing hole maintaining
a more constant flow co-efficient K at high velocities enabling
a wide range of flow measurement (turndown). See brochure Page
2.
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7. Torbar provides secondary averaging –
what is this?
With normal Averaging Pitot Tubes, the sensing hole
nearest to the take off point has the greatest effect leading
to distorted effects in cases of non uniform flow profiles.
Torbar incorporates a secondary internal averaging tube causing
the output to be taken from a more averaged position. This is
particularly valuable where pipework conditions are less than
ideal eg if straight pipe lengths are limited.
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8. What straight lengths will I need?
The recommended pipe lengths are given on Page 12 of
the technical brochure which can be viewed or downloaded by
clicking the “Brochure” icon.
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9. How is Torbar installed?
Full Installation, Operating and Maintenance instructions can
be viewed or downloaded by clicking the “Brochure”
icon.
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10. What benefits does Torbar have over other
Flowmeter types?
Benefits of Averaging Pitot Tubes in general and Torbar
in particular include:-
- Ease
of installation by means of single or double hole insertion
- Wide
range of applications including gases, liquids and steam.
- Low
initial cost
- Absence
of moving parts or wear gives long life and low maintenance
- Low
pressure drop gives substantial energy costs compared to other
devices such as Orifice plates
- Available
for high temperature applications up to 1200° C in exotic
materials.
- Can
be used with square and rectangular ducts
- One
piece design gives high strength and durability
- Secondary
averaging feature gives greater tolerance of less than ideal
pipework layouts.
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11. Can you provide Mass flow results as well as Volumetric
flow?
Torbar can be provided with an integral temperature
sensor allowing the computation of compensated Mass Flow. See
page 16 of the technical brochure which can be viewed or downloaded
by clicking the “Brochure” icon.
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12. Do you have Calculation Software?
Our DP Calculation software can be downloaded by clicking
the “Brochure” icon.
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13. To what standards are Torbars manufactured?
The Torbar Quality Control system is approved to BS
EN ISO 9001:2000 and CE marked in accordance with 97/23/EC PED.
Torbars are manufactured and engineered to stringent routines
including BS, ANSI, ASME, ISO and DIN standards.
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14. Can you provide a retractable version
of Torbar?
Details of retractable versions of Torbar can be found
on Pages 6 & 15 of the brochure.
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