Water Hammer in Pipes Apparatus MODEL FM 134
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Water Hammer in Pipes Apparatus MODEL FM 134
Sci-tech Water Hammer in Pipes Apparatus Model FM 134 can be used to study water hammer and pressure waves in long pipelines.
Item Description
Water hammer in pipes is a significant problem in engineering as they can cause severe damage to piping, fittings and system components. Water hammer is caused by the inertia effect of the flowing fluid being subjected to an abrupt changes in velocity, e.g. when rapidly closing a valve. Therefore, knowledge about the emergence of water hammer is an important aspect of designing pipework systems. Water hammer is generated by closing a valve at the end of the pipe section. The water hammer is then reflected to the beginning of the pipe as an inverted wave. A pressure vessel with air cushion at the start of the pipe section simulates the open beginning of the pipe, so that there is a clear reflection of the wave. In order to achieve reflection times that are large enough, a 60m long pipe section has been installed, which is shaped as a coiled tube to save space. In experiments, the emergence of water hammer is studied as a function of the valve closing times. The trainer therefore includes two solenoid valves, one with constant closing time and one with adjustable closing time. Optionally resulting pressure oscillations are measured by a pressure sensor and the pressure curve is displayed by the software. A valve is used to adjust the flow rate. System pressure and flow rate are displayed. A safety valve protects the system against overpressure.
Features
Investigation of water hammer and pressure waves in pipes 60m long pipe section
Measuring the velocity of sound in water
Solenoid valve with adjustable closing time
Optional software for displaying the pressure curve
Technical Specifications
Specifications
1. Investigation of water hammer and pressure waves in pipes
2. Pipe section as coiled tube to save space
3. Generation of water hammer via solenoid valve with constant closing time
4. Generation of water hammer via solenoid valve with adjustable closing time
5. Pressure vessel with air cushion reflects the wave
6. Safety valve protects against overpressure in the system
7. Instruments: pressure sensor, rotameter, manometer
8. Representation of the pressure curves and the flow rate with software
9. Optional software for data acquisition via USB under Windows
Technical Specifications
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
Safety valve: 16bar
Pipe section, copper
length: 60m
inner diameter: 10mm
Pressure vessel: 5L
Measuring ranges
pressure: 0…16bar
flow rate: 30…320L/h
Experiments
water hammer as a function of flow rate
water hammer as a function of valve closing time
display pressure curve
determine reflection time
calculation of the velocity of sound in water
Mains Power
220 – 240V 1Ph, 50Hz
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