Two-phase flow is a flow that is composed of several combined substance that is liquid and gas. Two phases flow phenomena can be a lot we encounter in nature, e.g. exhaust gas smoke, fog, rain, cloud, snow, and so on, while applying for a corporate environment or industry, the flow of the two phases can be encountered on the equipment in the form of heat exchangers, boilers, nuclear reactors, piping systems, geothermal, natural gas liquefaction, and others. The purpose of the two phases flow research is to know the value of fraction vacuum on characteristics of the flow pattern bubbly, plug, slug-annular, annular, and churn and also to know the speed, length, and frequency of the pattern of bubbly and plug in two-phase flow with a slope of 50 on the capillary pipes horizontal. Data retrieval in this research was conducted in four stages (on the basis of fluid it works), with the viscosity of the air-aquades +40% glycerin, air-aquades + 50% glycerine, air-aquades + 60% glycerin, and air-aquades + 70% glycerin. Testing is done to determine the fractional vacuum by using the method of digital image processing with MATLAB application program R2014a. In the process of data capture, air compressor function provides air pressure. Air compressor is equipped with a water trap and air dryer for the guarantee that the air coming into the system is pressurized dry air without water content. Press vessels (pressurized tanks) made from stainless steel, used as a pneumatic pump, to drain the fluid goes into the mixer without pumped, with the aim of avoiding the effects of pulsation. For video streams, used high-speed camera brands Nikon type J4, with a speed of 1200 fps and a resolution of 640 x 480 pixels.. Research conditions are adiabatic. An experiment conducted on gas superficial velocity (JG) with intervals of 0.025 – 66.3 m/s, and liquid superficial velocities (JL) 0.033 intervals – 4.935 m/s. Based on the research results obtained that the superficial gas velocity high then the value of the fraction vacuum obtained will increase, otherwise the higher speed of the liquid fraction of the value of superficial platitudes that are retrieved will be increasingly decreased. On bubbly flow pattern and plug are strongly influenced by the viscosity of the fluid. That is because the higher the viscosity of fluid flow pattern speed then the bubbly and the plug will increasingly decline, instead of declining viscosity so bubbly flow pattern speed and the plug will progressively increase. The length of the pattern of the bubbly and plug are affected by the increasing value of vacuum homogeneous fraction (β), the length of the pattern will experience an increase. On the frequency of occurrence of the bubbly and plug obtained a frequency is high enough, it would result in the value of the fraction vacuum generated considerable increases