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Products  |  Fluid Mechanics and Hydrology  |  Flow in Pipes  |  HM 155
HM 155 Water Hammer Apparatus Show data sheet (pdf file) Print page
Technical Description
The experimental set-up for the investigation of water hammer in pipes is clearly laid out on a laboratory trolley. For reasons of space, the experimental pipe section is of a spiral design. The medium used for the experiments is water. Using solenoid valves, an abrupt change in the flow speed in the pipe can be induced, this initiates a pressure pulse. A pressure vessel with a cushion of air simulates an open ended pipe such that there is a clear reflection of the pressure wave. A pressure transducer measures the pressure wave and converts it into a voltage signal. To make the pressure characteristic visible, an oscilloscope can be connected. The reflection time and closing time of the solenoid valve can be read on the oscillogram. The oscilloscope is not included.
Learning Objectives / Experiments
· Investigation of water hammer and pressure waves in pipes:
- Calculation of the speed of sound
- Determination of the reflection time
- Depiction of the pressure characteristic
· Water hammer as a function of the flow rate
· Water hammer as a function of the closing speed of the solenoid valve
· Preparation of the "water hammer against volumetric flow rate" characteristic curve
· Display of pressure oscillations on an oscilloscope (the usage of a commercially available storage oscilloscope is recommended)
Features
Experimental set-up for the investigation of water hammer in pipes
60m long pipe section
Alternative products
HM 150.15 -- Hydraulic Ram Pump
HM 156 -- Surge Tank and Water Hammer Unit
Specification
[1] Experimental set-up for the investigation of water hammer in pipes
[2] Spiral pipe made of copper, 60m long, id=10mm
[3] Solenoid valve with constant closing time
[4] Solenoid valve with adjustable closing time
[5] Pressure vessel with cushion of air as chamber
[6] Control unit for transformation of pressure pulses into voltage signals
[7] Safety valve 16bar
[8] Variable-area flowmeter 300Ltr/h
[9] Pressure transducer 0..10bar absolute
[10] 230V,~50Hz
Technical Data
Solenoid valve, constant closing time
Closing time: 20..30ms
Operating pressure: 0..10bar

Solenoid valve, adjustable closing time
Closing time: 1..4s
Operating pressure: 0.2...12bar

Variable-area flowmeter 300Ltr/h

Pressure transducer 0..10bar absolute
Dimensions and Weight
l x w x h: 1100 x 750 x 1360 mm
Weight : approx. 130 kg
Connections
230V,~50Hz
Cold water connection 300Ltr/h
Scope of Delivery
1 experimental set-up, complete, 1 instruction manual
Order Details
070.15500 HM 155 Water Hammer Apparatus
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© 2005 G.U.N.T. Gerätebau GmbH