Influence of Effective Head on the Characteristics of Flat-Seated Disc Valve : 9th Report, Experimental Research on Disc Valves

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概要

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• The experiments were performed on three flat-seated disc valves, having diameters d of 28.0,30.2 and 38.8 mm, discharging water into the air under a constant head H which was varied from 194 cm to 9 cm. The discharge Q and the lifting force P were precisely measured at each valve lift l. The results show that ; (1) discharge coefficient ∝Q/l√<H> is more markedly affected than the non-dimensional lifting force ∝ P/H by the effective head H ; (2) if the lift l is not so small, the influence of H on Q/l√<H> and P/H becomes very small when H is greater than 194 cm ; (3) four special points are marked on a characteristic curve for H greater than 49 cm. Besides this many unexpected relations are observed.

• 一般社団法人日本機械学会の論文

著者

• OKI Iwao

  Waseda University

• Oki I.

  Waseda University

関連論文

• Characteristics of Disc Valves in Angle-Valve Type Chambers : Experimental Research on Disc Valves, 5th Report
• Experimental Research on Disc Valves : 7 th Report, Experimental Formulae for Discharge and Lifting-Force of Flat-seated Valve
• Some Considerations on the Characteristics of Disc Valves as Disclosed by Our Experiments : Experimental Research on Disc Valves, 6 th Report
• Characteristics of Disc Valves of High-Lift Safety-Valve Type : Experimental Research on Disc Valves, 4th Report
• Influence of Effective Head on the Characteristics of Flat-Seated Disc Valve : 9th Report, Experimental Research on Disc Valves
• Characteristics of Flat-Seated Valves with Broader Seat-Face : 8 th Report, Experimental Research on Disc Valve

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