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ST 250 Cavitation Demonstrator
Education / GUNT Hamburg / Thermal Engineering and HVAC / Sanitary Systems /

The term cavitation is used for the formation of vapour bubbles in flowing liquids as a result of a large partial vacuum.

  The experimental unit contains a venturi tube made of transparent plastic. Cavitation is induced when the pressure at the smallest cross-section drops below the vapour pressure of the water.

  The pressures at the inlet, at the smallest point and at the outlet of the venturi tube are displayed using the dial manometers. The flow rate can be read on a rotameter. The inlet pressure can be preset using a pressure reducing valve.

Learning Objectives / Experiments
- Layout and function of a Venturi tube
- Cavitation processes for varying flow rates
[1] Investigating cavitation in a venturi tube
[2] Venturi tube with 3 pressure measuring connections
[3] Adjustment of flow rate on manual valves
[4] Copper piping
[5] Pressure reducing valve, adjustable
[6] 3 manometers
[7] Bimetallic dial thermometer
[8] Rotameter
Technical Data

Pressure reducing valve: 0.5...2bar, up to 70°C
Transparent Venturi tube

- inlet flow cross-section: d=18mm, taper 10.5°
- smallest flow cross-section: d=3.5mm
- outlet flow cross-section: d=18mm, tape 4°

Measuring ranges 
- pressure: -1...1.5bar
- temperature: 0...60°C
- flow rate: 1000L/h


Dimensions and Weight
l x w x h: 700 x 400 x 930 mm
Weight: approx. 30 kg
Required for Operation
Cold water connection: 2bar
Scope of Delivery

1 experimental unit

1 manual

Order Details
066.25000  ST 250  Cavitation Demonstrator