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Flow Indication & Control |
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The
Parshall flume is one of a large class of open channel
primary elements known as critical flow venturi flumes.
A distinguishing characteristic of the Parshall flume
is the downward sloping invert of the throat. This feature
gives the Parshall flume its ability to operate at higher
ratios of downstream to upstream head than any other
such device.
The Parshall flume manufactured by Eastech Flow Controls
is a monolithic fiberglass reinforced polyester structure
to assure maximum strength and accuracy of dimension
while minimizing installation time. A staff gauge with
1/4" minor divisions in inches is standard. A 2"
NPT stilling well connection is available as an option.
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The Parshall is recommended for
those applications in which moderate concentrations
of sand, grit or other heavy solids exist and fluid
velocities entering the flume are subcritical. The flume
operates with a small energy loss or change in channel
grade, about one-fourth that of weirs having the same
crest length. The flume is ideally suited for fluid
measurement in irrigation channels or sewers. |
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Application
The Parshall is recommended for those applications
in which moderate concentrations of sand, grit or other
heavy solids exist and fluid velocities entering the
flume are subcritical. The flume operates with a small
energy loss or change in channel grade, about one-fourth
that of weirs having the same crest length. The flume
is ideally suited for fluid measurement in irrigation
channels or sewers.
Calibration
The Parshall flume exhibits reproducible head rise/flow
rate characteristics throughout its size range. In order
to assure the accuracy of the device, adherence to all
dimensions for construction as well as free flow hydraulic
conditions is required. |
Manufactured by
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| Company: |
Eastech Flow Controls |
| Products: |
Ultrasonic Flow/Level,Vantage
2200 Series,Open Channel & Level,Ultrasonic
Transit Time,Vantage 4000 Series,Closed Pipe Flow
Meters,Ultrasonic Flow,Accuron 7000 Series,Open
Channel Cartridge Meters,Area X Velocity Flow
Meters,Partially Filled Pipes and Channels,Chartmeter
5000,Flume, Manhole & Parshall,Vantage DDS
Software |
| Website: |
http://www.eastechflow.com/ParshallFlume.asp |
| Tel: |
800.226.3569 |
| Country |
United States |
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Company Info:
Flow Management Solutions Eastech Flow Controls has a long
history of providing innovative flow measurement solutions
for a wide range of applications.
Much of the company's success can be attributed to a combination
of in-depth flow technology knowledge and the continuous development
of sophisticated microprocessors for ultrasonic measurement
of flow. Innovative techniques analyze signal information
from field-mounted sensors that are capable of measuring time
differences to picosecond resolution.
At the Company's 30,000 square foot facility in Tulsa, Oklahoma,
ultrasonic transit-time flow and level meters are manufactured
to cover a wide range of applications that includes open channel,
closed pipe and partially filled pipes. Four distinct series
of flow and level meters provide reliable and accurate flow
data for a wide variety of process control systems. |
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Types of Flowmeters |
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