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http://dx.doi.org/10.14775/ksmpe.2021.20.09.063

Comparison of Loss Coefficient using 1-inch Ball and Glove Valve Opening Ratio  

Kang, Chang-Won (Korea South-East Power Co.)
Yi, Chung-Seob (School of Lift Engineering, Korea Lift Collage)
Lee, Chi-Woo (Department of Automotive Engineering, Gyeongsang National University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.9, 2021 , pp. 63-69 More about this Journal
Abstract
This study aims to determine the flow characteristics of a one-inch small ball valve and glove valve used in industrial plants. The flow was changed through an experimental equipment, and the internal flow characteristics of the valves were compared. Considering the pressure drop, the decrease in the slope of the ball valve based on the degree of the valve opening was relatively greater than that of the glove valve; further, the slope of the glove valve was gentle while the pressure drop was high. The flow velocity of the ball valve remains consistent after the valve was opened by 70%, whereas the flow velocity of the glove valve constantly increased. The valve loss factor of the ball valve was relatively low compared with that of the glove valve. When the valve was opened by 20%, which is the beginning stage of the valve opening, the valve loss factor of the ball valve was high and gradually became low. This is a structural problem of the ball valve, and the loss factor is significant because the flow path installed at the ball valve has a considerably small area. However, the overall loss factor of glove valve is high because it has a complicated structure of flow path.
Keywords
Ball Valve; Glove Valve; Valve Loss Coefficient;
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