The vapor-liquid contact and interfacial area on the valve tray were investigated on the basis of the mechanism of bubble deformation and breakage in the turbulent liquid.A mathematical model was proposed to compute the interfacial area on the valve tray.This model was capable of comparing the effects of the different valve configurations on the interfacial area.Based on the study，a new type valve，called guided rhombic valve（GRV），was designed and tested on a test rig with a column inner diameter of 1000 mm.The results showed that the gas-liquid interfacial area of GRV could be remarkably increased.