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| Structural design and performance research of seven-channel spherical check valve |
| Zhao Fei1, Fu Jie1, Song Wenwu1, Wang Chunzhi2 |
| 1.School of Energy and Environment, Xihua University, Chengdu, Sichuan 610039, China; 2.Chengdu Weisheng Seal Unit Assemblage Equipment Co.Ltd., Chengdu, Sichuan 610039, China |
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Abstract A seven-channel spherical check valve was designed to solve the prevailing problem and to overcome disadvantages of check valves for DN≥200 mm piping system. UG software was used to establish the model of the seven-channel spherical check valve. By using CFD technique, the internal flow of the seven-channel spherical check valve was numerically simulated. On the same water hammer test rig, the water hammers and hydraulic losses of spherical and swing check valves were tested and compared. The results show that the maximum water hammer pressure of the seven-channel spherical check valve is only half of the swing check valve, the closing time of the former is double of the latter, with the same diameter for hard shutdown condition of the pump. In the same throughout flow condition, the hydraulic loss of the former is only 10% of the latter.
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Received: 26 November 2012
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