The scope of this document is to summarize the field trial Expro FlowCaT? and Geoservices GEM-Valve? Wireless Electromagnetic Surface Controlled Sub-surface Safety Valve in Fiume Treste field, sud Italyt provide a final technical evaluation. In 2007, COMP started study about existing Valve, have complete knowledge their status worldwide wells make statistic analysis most common failures.The con...

The aim of this paper is to analyze the driving system actuated by a proportional directional control valve on a hydraulic cylinder. In order to evaluate the dynamic interaction between the proportional valve and the cylinder theoretical analysis, numerical simulations as well as experimental test are performed. Coupling cylinder and proportional valve, it is very important to know the ratio of...

Direct pump control of hydraulic systems is more energy efficient than throttle valve based methods to control hydraulic systems. This requires variable displacement pumps that are responsive and capable of electronic control. Such Electronic Displacement Controlled (EDC) pumps tend to be significantly larger, heavier and more expensive than fixed displacement counterparts. In addition, achieva...

We consider a mathematical model for the gas flow through one-way valve and focus on two issues. First, we propose way to eliminate chattering (the fast switch off of valve) by slightly modifying design valve. This mathematically amounts construction coupling Riemann solver with suitable stability property, namely, coherence. provide numerical comparison behavior valves. Second, analyze, both a...

The hot gases produced by the internal combustion engines passes through the exhaust valve and causes high temperatures in the exhaust valve and its seat. To avoid damaging the exhaust valve, heat must be transferred from the valve to its seat during the contact they make at the opening and closing cycle. Heat transfer rate from the exhaust valve to its seat is a function of many factors. One o...