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Products  |  Thermal Engineering and HVAC  |  Heating and Ventilation in Buildings  |  HL 103
HL 103 Fitting Loss Training Panel Show data sheet (pdf file) Print page
Technical Description

Four measured sections are fitted to the panel, each comprising ten elbows and bends in different layouts. The overall length of each section is the same. It is possible to measure the pressure loss and to investigate the effects of material, surface roughness and flow rate.

  The water flows through a pipe with a valve and flow meter before passing through the measured sections. The section under test is connected with a hose.

Learning Objectives / Experiments
- Flow rate measurement
- Differential pressure measurement
- Effect of material and pipe wall roughness
- Effect of flow rate
- Effect of bend radius

* Investigation of pressure loss in pipe fittings1
* Four different measuring sections with elbows

  and bends1
* Water connections made using quick-release

* Operation independent of mains electricity

Alternative products
HL 102 -- Pipe Friction Training Panel
HL 113 -- Losses in Valves and Fittings Training Panel
HM 150.29 -- Losses in Bends and Fittings
[1] Investigation of pressure loss in pipe fittings such as elbows and bends
[2] 4 different measuring sections, 10 elbows/bends
[3] Pressure measurement with annular chambers with digital differential pressure manometer
[4] Flow rate measurement with rotameter
[5] Water connections made using quick-release couplings
[6] Water feed via pressure reducing valve
Technical Data

Differential pressure manometer with bleed valve

- supply: 9V, battery-powered
Outlet pressure at pressure reducing valve: 0.5...2bar
Pipe sections: measured length: 2300mm
- Pipe section 1: steel, 1/2", 90 elbow
- Pipe section 2: steel, 1/2", 90 bend
- Pipe section 3: copper 18x1mm, 90 elbow
- Pipe section 4: copper 18x1mm, 90 bend


Measuring ranges

- pressure: 0...2000mbar

- flow rate: 150...1600L/h

Dimensions and Weight
l x w x h: 1650 x 140 x 110 mm (panel)
Weight: approx. 52 kg (panel)
Required for Operation
Water connection: 1500L/h, drain
Scope of Delivery

1 trainer

1 connecting hose

1 pressure gauge

1 manual

Order Details
065.10300  HL 103  Fitting Loss Training Panel
© 2005 G.U.N.T. Gerätebau GmbH