doiSerbia

Experimental and numerical research of the flow inside the control valves trim

Ilić Dejan B. (Hydraulic Machinery and Energy Systems Department, Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia), dilic@mas.bg.ac.rs
Janković Novica Z. (Hydraulic Machinery and Energy Systems Department, Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia)
Čantrak Đorđe S. (Hydraulic Machinery and Energy Systems Department, Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia)
Savić Ljubomir R. (VLL Solutions, Vienna, Austria)

In this paper are presented desing, testing and numerical analysis for two manufactured control valve trims. Valve trim is consisted of cage or dick stack, plug, stem and seat. Size from app. 15.88 mm (0.625 in) up to 101.6 mm (4 in) is suitable for 3-D metal and plastic print, what is presented in this paper. Selective laser melting 3-D metal printing is applied on the disc presented in this paper. Even better material properties from rest of the valve parts could be obtained. This is of great importance for valve retrofitting. In this paper is presented, also, new developed channel geometry, what is followed by various fluid-flow phenomena. Measurement results for second prototype manufactured by 3-D printing using plastics are presented in details. Here is shown, in short, procedure for determination of KV values of the test valves according to the EN 60534-2-3, Industrial-process control valves – Part 2-3: Flow capacity – Test procedures. In addition, some aspects of CFD calculations are presented.

Keywords: control valve, trim design, standardized test procedure, 3-D modeling, 3-D metal and plastic printing, CFD