Design and simulation of low pressure membrane flow valve

WANG Zhaoran

(Ministry of Environmental Protection of the People′s Republic of China, Nuclear and
Radiation Safety Center, Beijing 100082, China)

Abstract: In order to regulate the flow under the particles contained fluid condition, a low pressure membrane flow valve was designed. Firstly, valve core structure was chosen by comparing orifice area among different valve ports. The internal flow field of flow valve was simulated by FLUENT. Threedimensional model was confirmed under the same input and output condition. The flow characteristics of low pressure membrane flow valve under different spool position was simulated by NS equation. The experimental platform was built, and a flow test was done. The results indicate that the regulation accuracy of this low pressure membrane flow valve can meet the general requirements of low pressure flow control. The simulative results experimental results coincide with each other and show good linearity characteristic as well. The results also provide the basis for improving the structure of this membrane flow valve in future work.

Key words: membrane; flow valve; CFD; orifice area; flow rate