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h7 experiment

By alpsinth Dec 16, 2013 636 Words
Page 1 of 2


Friction Loss in a Pipe

For direct measurement of friction loss in
a small-bore horizontal pipe, during both
laminar and turbulent flow

• Directly measures friction loss in a small-bore test pipe • Investigates laminar and turbulent flow and the transition point • Shows the critical Reynolds Number and verifies Poiseuille’s Equation for laminar flow • Includes precision valve for precise flow control and a Header Tank for good laminar flow • Works with TecQuipment’s Volumetric or Gravimetric Hydraulic Benches (H1 or H1D) for easy installation

TecQuipment Ltd, Bonsall Street, Long Eaton, Nottingham NG10 2AN, UK T +44 115 972 2611 • F +44 115 973 1520 • E • W An ISO 9001 certified company

Page 2 of 2


Friction Loss in a Pipe



The Friction Loss in a Pipe apparatus allows students to
study the change in the laws of resistance for laminar to
turbulent flow and find the critical Reynolds number. The
apparatus shows the flow transition point from laminar to
turbulent, and is ideal for demonstrations as well as
student experiments.

Study of friction loss in a pipe, including:

The equipment is a small-bore, straight test pipe on a base
plate. It works with TecQuipment’s Gravimetric or
Volumetric Hydraulic Benches (H1 or H1D, available
Static pressure tappings upstream and downstream of the
test pipe connect to a water manometer and a pressure
gauge. The back panel holds the pressure gauge and a
water manometer with calibrated scales. The water
manometer measures lower differential pressures in the
laminar and lower turbulent flow regions (just above the
critical Reynolds Number). The pressure gauge measures
higher pressures in the turbulent flow region. The water
manometer includes an air valve and hand-pump. The
hand-pump adjusts the datum of the water manometer
where necessary. A valve at the downstream tapping
allows students to isolate the water manometer during the
higher flow tests. A precision needle valve downstream of
the test pipe accurately controls flow rate.
To perform experiments, students stand the apparatus on
the hydraulic bench and fit the Header Tank (supplied). For
low flow rate experiments, the Header Tank supplies the
test pipe. For higher flow rate experiments, the hydraulic
bench supplies the test pipe directly. Students set the flow rate, measuring it by timing the collection of water in a
measuring vessel (included).
Students take readings of temperature from a thermometer
and readings of head from the manometer or the pressure
gauge. They then use the results to produce charts to help
compare actual results with theory.

Standard Features
• Supplied with a comprehensive user guide
• Two-year warranty
• Manufactured in accordance with the latest European
Union directives

• Investigations of laminar and turbulent flows
• Demonstration and measurement in the change of the
laws of resistance (friction factor) from laminar to
turbulent flow
• Finding the critical Reynolds Number
• Verifying Poiseuille’s Equation and the coefficient of viscosity for water in the laminar flow region

Essential Base Unit
• Gravimetric Hydraulic Bench (H1)
• Volumetric Hydraulic Bench (H1D)

Essential Services
Water supply:
From the hydraulic bench (H1 or H1D)

Operating Conditions
Operating environment:
Laboratory environment
Storage temperature range:
–25°C to +55°C (when packed for transport)
Operating temperature range:
+5°C to +40°C
Operating relative humidity range:
80% at temperatures < 31°C decreasing linearly to 50% at

Main Unit Nett Dimensions (assembled):
1000 mm long x 800 mm high x 200 mm front to back
and 6 kg.
Header Tank Nett Dimensions (assembled):
400 mm high x 250 mm outside diameter and 800 mm
overflow/support pipe. Combined 5 kg.
Total Nett Weight: 12 kg
Approximate Packed Dimensions and Weight:
0.2 m3 and 15 kg
Test pipe internal diameter (nominal): 3 mm
Water manometer range: 0 to 530 mm water
Pressure gauge range: 0 to 6000 mm water

TecQuipment Ltd, Bonsall Street, Long Eaton, Nottingham NG10 2AN, UK T +44 115 972 2611 • F +44 115 973 1520 • E • W An ISO 9001 certified company

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