Countermeasure of water hammer in pressure-reducing pipeline system using surge relief valve

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Countermeasure of water hammer in pressure-reducing pipeline system using surge relief valve

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Transaction of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
No. 200, published on Apr. 25, 1999

Transaction of The Japanese Society of irrigation, Drainage and Reclamation Engineering irrigation, Drainage and Reclamation Engineering

Countermeasure of water hammer in pressure-reducing pipeline system using surge relief valve

Reprinted from Transaction of the Japanese Society of Irrigation, Drainage and Reclamation Engineering No. 200


Countermeasure of water hammer in pressure-reducing pipeline system using surge relief valve

Hitone Inagaki

Research Student of the United Graduate School of Agricultural Sciences, Kagoshima University

Kunio Ogura

Yokota Mfg. Co., Ltd.

Noriaki Tsunoda

Crown Engineering Co., Ltd.

Fumiyoshi Kondo

Faculty of Agriculture, Miyazaki University


Abstract (Original text)
We conducted a field test on a pressure-reducing pipeline system equipped with a new type of automatic control valves for field irrigation, and verified its pressure reducing function, reproducing the results of measurement by simulation using a mathematical model. The simulation of generating status of water hammering pressure brought about by the operation of a diversion device at the end of pipeline revealed that the rapid closeout of the terminal valve propagated pressure wave upstream through the automatic control valves. As a countermeasure for restraining the water hammering pressure, the installation of a surge relief valve was studied. As a result, it was found effective to install the surge relief valve at the end of the pipeline for the downstream side of a pressure-reducing valve (automatic control valve), and it was found effective to additionally install it at the upstream side of a pressure-reducing valve. It was also found that the size of the surge relief valve requires about the same level as the main pipe in terms of diameter.

Key words:

Automatic control valve, Pressure-reducing pipeline system, Surge relief valve, Mathematical model, Simulation



For details of this new type of automatic pressure control valve, please refer to Constant Pressure Valve UFSP type.


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