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Products  |  Fluid Mechanics  |  Fundamentals of Fluid Mechanics  |  HM 150.11
HM 150.11 Losses in Piping Elements, Valves and Fittings Show data sheet (pdf file) Print page
Technical Description

  Flow losses occur during the flow of real fluids due to friction and turbulence (vortices). Flow losses in pipes, piping elements, fittings and measuring instruments (e.g. flow meter, velocity meter) cause pressure losses and must therefore be taken into account when designing piping systems.
  HM 150.11 allows to study the pressure losses in pipes, piping elements and shut-off devices. In addition, the differential pressure method is presented for measuring the flow rate.
  The experimental unit contains six different pipe sections capable of being shut off individually. The pipe sections are equipped with piping elements such as bends, elbows and branches. In one pipe section, different shut-off devices and measuring objects are installed to determine the flow rate. The measuring objects are made of transparent material and provide excellent insight into the inner structure. The pressure measuring points in the piping system are designed as annular chambers. This creates a largely interference-free pressure measurement.
  The experiments measure the pressure losses in pipes and piping elements, such as branches and bends. The opening characteristic of the shut-off devices are also recorded. The pressures are measured with tube manometers.
  The experimental unit is positioned easily and securely on the work surface of the HM 150 base module. The water is supplied and the flow

rate measured by HM 150. Alternatively, the experimental unit can be operated by the laboratory supply.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.


Learning Objectives / Experiments

- pressure losses in pipes, piping elements and

- how the flow velocity affects the pressure loss
- determining resistance coefficients
- opening characteristics of angle seat valve and gate

- familiarisation with various measuring objects for

  determining flow rate:
  * Venturi nozzle
  * orifice plate flow meter and measuring nozzle



* Pressure losses in the piping system1
* Pressure measurement without interaction via

  annular chambers1
* Transparent measuring objects for determining

  flow rate

Available accessories
HM 150 -- Base Module for Experiments in Fluid Mechanics
Alternative products
HM 111 -- Pipe Networks
HM 150.29 -- Losses in Bends and Fittings

[1] investigation of pressure losses in piping elements and shut-off devices
[2] different measuring objects for determining flow rate according to the differential pressure method
[3] six pipe sections capable of being individually shut off, with different piping elements: sudden contraction, sudden enlargement, Y-pieces,
T-pieces, corners and bends
[4] one pipe section to hold interchangeable shut-off/measuring objects
[5] measuring objects made of transparent material: Venturi nozzle, orifice plate flow meter and measuring nozzle
[6] shut-off devices: angle seat valve, gate valve
[7] annular chambers allow measurement of pressure without interaction
[8] 2 twin tube manometers for measuring the pressure difference
[9] flow rate determined by HM 150 base module
[10] water supply using HM 150 base module or via laboratory supply


Technical Data

Pipe section to hold fittings or measuring objects
- 20x1,5mm, PVC
Pipe sections
- straight: 20x1,5mm, length: 800mm, PVC
- sudden contraction: 32x1,8-20x1,5mm, PVC
- sudden enlargement: 20x1,5-32x1,8mm, PVC
- with 2x Y-piece 45 and 2x T-piece
- with 2x 90 elbow/bend: 20x1,5mm, PVC and
  2x 45 elbow: 20x1,5mm, PVC
2x twin tube manometers: 0...1.000mmWC


Measuring range
- pressure: 0...0,1bar


Dimensions and Weight
LxWxH: 1.550x640x1.300mm
Weight: approx. 58kg
Required for Operation
HM 150 (closed water circuit) or water connection and drain 
Scope of Delivery
1 experimental unit
2 shut-off devices (angle seat valve, gate valve)
1 Venturi nozzle, 1 orifice plate flow meter or measuring nozzle
1 set of hoses
1 set of tools
1 set of instructional material
Order Details

070.15011  HM 150.11  Losses in Piping

                                       Elements, Valves and


© 2005 G.U.N.T. Gerätebau GmbH