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research-article

Pressure drop analysis of pilot-control globe valve with different structural parameters

[+] Author and Article Information
Zhi-jiang Jin

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China
jzj@zju.edu.cn

Zhi-xin Gao

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China
zhixingao@foxmail.com

Ming Zhang

Hangzhou Worldwides Valve Co., Ltd., Hangzhou 311122, China
392527626@qq.com

Jin-yuan Qian

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, ChinaDepartment of Energy Sciences, Lund University, Lund SE-22100, Sweden
qianjy@zju.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4036268 History: Received January 11, 2017; Revised March 03, 2017

Abstract

Pilot-Control Globe Valve (PCGV) can use the pressure drop caused by fluid flowing through the orifice located at valve core bottom to open or close the main valve using a small pilot valve. In this paper, Computational Fluid Dynamics (CFD) method is adopted to analyze the pressure drop before and after valve core of PCGV and minor loss of orifice under different structural parameters and inlet velocities, and the simulation results show a good agreement with the experimental results. It turns out that the valve diameters, orifice diameters and pilot pipe diameters have great influences on the pressure drop and the loss coefficient. Moreover, an expression is proposed which can be used to calculate minor loss coefficient, then to estimate the pressure drop and driving force of a PCGV within limited conditions. This paper can be referenced as guidance for deciding the dimension of structural parameters and spring stiffness during design process of a PCGV.

Copyright (c) 2017 by ASME
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