Experimental Study on Performance Characteristics of High Speed Air Valve for Water Works

급수용 급속공기밸브의 성능특성에 관한 실험적 연구

  • Lee, Sun Kon (Department of Mechanical Engineering, Inha University) ;
  • Kaong, Sae Ho (Department of Mechanical Engineering, Incheon National University) ;
  • Yang, Cheol Soo (Department of Mechanical Engineering, Incheon National University) ;
  • Woo, Chang Ki (Department of Mechanical Engineering, Incheon National University)
  • 이선곤 (인하대학교 기계공학과) ;
  • 강세호 (인천대학교 기계공학과) ;
  • 양철수 (인천대학교 기계공학과) ;
  • 우창기 (인천대학교 기계공학과)
  • Received : 2013.07.24
  • Accepted : 2014.09.19
  • Published : 2014.10.31


When the fluid energy convert into kinetic energy due to water hammer, the propagation velocity of pressure wave appear. The propagation velocity of pressure wave(1050 m/s) of very fast could be damage to the pipeline system. If the occurrence of water hammer is due to down-pressure, the faster the air exhaust or supply device is needed. it is high Speed Air Valve. In this paper, Each 3.12, 3.13, 3.72, $3.74kg/cm^2$ pipeline pressure were setting, and then executed pressure rapid drop for obtaining a high Speed Air Valve Operating time and pressure change data. the result was that pipe line pressure stabilization time were each 0.98, 1, 1.22, 1.25 sec. In other words, that pressure drop experimental results pipe line pressure was equal to atmospheric pressure without negative pressure After about one second. The study result would be useful to pipe line system stability design because this data could be foresee pressure stabilization time.


  1. K.-Y. Kim, "Waterhammer in the Transmission Pipeline with an Air Chamfer" The Korean Society of Mechanical Engineers, Vol. 26, Issue. 2, pp. 177-183, 2002.
  2. S. K. Lee and Cheol Soo Yang, "Water-hammer in the Pump Pipeline System with and without an Air-Chamber" Journal of the Korean Society of Safety, Vol. 26. No. 1, pp. 1-7, 2011.
  3. J. E. Hodgson, "Pipeline Celerities", M.S. Thesis, University of Alberta, 1983.
  4. S.-G. Kim and K. B. Lee "Water Hammer in the Pump Pipeline System with an Air Chamber", Journal of Energy Engineering, Vol. 16, No. 4, pp. 187-193, 2007.
  5. E. B. Wylie and V. L. Streeter, "Fluid Transients in Systems", Prentice Hall; 1 Edition, pp. 464, 1993.